SLOW SPEED ON XP PC BUT FULL SPEED ON W7 PC

Hi I was wondering if anyone else had this problem???

After recently upgrading to Plusnet Fiber optic plus I was hugley dissapointed not to recieve the full speeds that I had been promised

To cut a long story short I discovered that I could only recieve speeds of over 30mbps on a pc using windows7 and on my main pc which uses XP the speed seems to be capped at 16mbps.

I would be hugely grateful if someone could suggest how I can adjust my lan setting to fix this problem (if indeed that is the cause)

Thanks in advance

Probably your RWIN, use Tcpoptimizer to adjust http://www.speedguide.net/downloads.php

Is this wired or wifi?

Edited by BatBoy (Thu 23-Feb-12 20:24:58)

How is the XP machine connected to the router - ethernet cable or wireless? Try again with a cable if it is currently wireless.

Additionally you may benefit from optimising your TCP/IP stack parameters. This is a link to one of several freely available tools that can help with that http://www.speedguide.net/downloads.php

Be sure to read some of the documentation linked from that page before proceeding with it.

It's a wired connection

ethernet cable directly from the router...

Edited by Tipper2772 (Thu 23-Feb-12 20:28:56)

What sort of processor and memory? If a really old and low spec PC it may not manage higher speeds

i know this may sound a bit stupid but do you have spotify installed on your xp computer and not your windows 7 computer...

the reason i say this is that it happend to me. i was getting a full 50mb on my computer then after installing spotify i was only getting a maximum of 23mb this carried on for 2 weeks until i realised, uninstalled spotify and tada back up to 50mb.

In reply to a post by MrSaffron:

What sort of processor and memory? If a really old and low spec PC it may not manage higher speeds

It's a pentium 4 with 4gb of ram installed - Pakard bell imedia 2005 ( I'm thinking it should be ok)

In reply to a post by azzercam:

i know this may sound a bit stupid but do you have spotify installed on your xp computer and not your windows 7 computer...

the reason i say this is that it happend to me. i was getting a full 50mb on my computer then after installing spotify i was only getting a maximum of 23mb this carried on for 2 weeks until i realised, uninstalled spotify and tada back up to 50mb.

nope - nothing streaming or using bandwidth..(that i can think of)

In reply to a post by BatBoy:

Probably your RWIN, use Tcpoptimizer to adjust http://www.speedguide.net/downloads.php

Is this wired or wifi?

I tried this tool with optimum settings at 40mbps and rebooted (it seems to have made it a little worse )

« SpeedGuide.net TCP Analyzer Results »
Tested on: 2012.02.23 15:51
IP address: 46.208.xx.xxx
Client OS/browser: Windows XP (Firefox 6.0.2)

TCP options string: 020405ac0103030401010402
MSS: 1452
MTU: 1492
TCP Window: 1027840 (NOT multiple of MSS)
RWIN Scaling: 4 bits (2^4=16)
Unscaled RWIN : 64240
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 41114kbps (5139KBytes/s)
BDP limit (500ms): 16445kbps (2056KBytes/s)
MTU Discovery: ON
TTL: 52
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)


these are the results of the analyzer

What does http://speedtester.bt.com say for the XP computer?

In reply to a post by Tipper2772:

« SpeedGuide.net TCP Analyzer Results »
Tested on: 2012.02.23 15:51
IP address: 46.208.xx.xxx
Client OS/browser: Windows XP (Firefox 6.0.2)

TCP options string: 020405ac0103030401010402
MSS: 1452
MTU: 1492
TCP Window: 1027840 (NOT multiple of MSS)
RWIN Scaling: 4 bits (2^4=16)
Unscaled RWIN : 64240
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 41114kbps (5139KBytes/s)
BDP limit (500ms): 16445kbps (2056KBytes/s)
MTU Discovery: ON
TTL: 52
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)


these are the results of the analyzer

BDP limit (500ms): 16445kbps (2056KBytes/s)

This figure seems to be the speed that it is capped at!.. can I change this manually?

In reply to a post by BatBoy:

What does http://speedtester.bt.com say for the XP computer?

it giving me speeds of 11mbps (max is 38) traffic managment?

earlier it was 33 using the thinkbroadband meter! (on the w7 pc) (16 on Xp)

Edited by Tipper2772 (Thu 23-Feb-12 21:18:02)

You could try swapping the network cables between the 2 PCs?

In reply to a post by BatBoy:

You could try swapping the network cables between the 2 PCs?

I only have one network cable.. I usually run the laptop (w7) wirelessly I tried it in both to test lan connection already. (thats when I realised that I was actually recieving over 30mbps from plusnet)

lol

In reply to a post by Anonymous:

BDP limit (500ms): 16445kbps (2056KBytes/s)
This figure seems to be the speed that it is capped at!.. can I change this manually?

You don't need to! That's not a limiting factor. It's for a round trip of 500ms, a long way away! You've also got:

BDP limit (200ms): 41114kbps (5139KBytes/s)

for a round trip of 200ms, nearer, but nowhere as near as the speedtesters you use.

I've got identical figures on my XP and I get speedtests of 18 Meg on my ADSL2+ line:

TCP options string = 020405ac0103030401010402

MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.

MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.

Default TCP Receive Window (RWIN) = 1027840
RWIN Scaling (RFC1323) = 4 bits (scale factor: 2^4=16)
Unscaled TCP Receive Window = 64240

For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values that might work well with your current MTU/MSS:
63888 (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)

bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 41114 kbps (5139 KBytes/s) @ 200ms
Your TCP Window limits you to: 16445 kbps (2056 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 48 hops
TTL value is ok.

Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349) = 00000000 (0)

In reply to a post by XRaySpeX:

In reply to a post by Anonymous:

BDP limit (500ms): 16445kbps (2056KBytes/s)
This figure seems to be the speed that it is capped at!.. can I change this manually?

You don't need to! That's not a limiting factor. It's for a round trip of 500ms, a long way away! You've also got:

BDP limit (200ms): 41114kbps (5139KBytes/s)

for a round trip of 200ms, nearer, but nowhere as near as the speedtesters you use.

I've got identical figures on my XP and I get speedtests of 18 Meg on my ADSL2+ line:

TCP options string = 020405ac0103030401010402

MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.

MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.

Default TCP Receive Window (RWIN) = 1027840
RWIN Scaling (RFC1323) = 4 bits (scale factor: 2^4=16)
Unscaled TCP Receive Window = 64240

For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values that might work well with your current MTU/MSS:
63888 (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)

bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 41114 kbps (5139 KBytes/s) @ 200ms
Your TCP Window limits you to: 16445 kbps (2056 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 48 hops
TTL value is ok.

Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349) = 00000000 (0)

Thanks for the info

Been trawling the web most of the night trying to figure it out Would an older network card "Realtek RTL8139/810x Family Fast Ethernet NIC" be compatable with fiber speeds - I can't seem to find much info about it??? Anyone?)

In reply to a post by Tipper2772:

Been trawling the web most of the night trying to figure it out Would an older network card "Realtek RTL8139/810x Family Fast Ethernet NIC" be compatable with fiber speeds - I can't seem to find much info about it??? Anyone?)

Should be fine. That's a 10/100Mbps interface card.

Take a look at the LEDs available on it - if it has one marked 100M then make sure it becomes lit on plugging in the cable (otherwise it is handshaking at 10Mbps).

If you have problems with it, it may be worth tracking down an updated driver. Shouldn't be necessary though.

Try disabling your Anti-virus protection while doing a speed test.

In reply to a post by dieselglider:

Try disabling your Anti-virus protection while doing a speed test.

Disabling anit-virus and firewall had no effect on speedtest

In reply to a post by GeeTee:

In reply to a post by Tipper2772:

Been trawling the web most of the night trying to figure it out Would an older network card "Realtek RTL8139/810x Family Fast Ethernet NIC" be compatable with fiber speeds - I can't seem to find much info about it??? Anyone?)

Should be fine. That's a 10/100Mbps interface card.

Take a look at the LEDs available on it - if it has one marked 100M then make sure it becomes lit on plugging in the cable (otherwise it is handshaking at 10Mbps).

If you have problems with it, it may be worth tracking down an updated driver. Shouldn't be necessary though.

Only available leds are on the back next to the plug one green and one yellow with no markings - green lights up when I insert the ethernet plug and yellow flashes when i'm d/loading. I am reaching speeds over 10mbps sometimes.... 16mbps max

I am considering updating the driver - would it really make a difference though?

A friend of mine suggested it may be caused by the router - I cant find settings that would account for this though ( and wouldn't that affect the other pc i connected too? (windows 7 pc connected to the router with the same ethernet cable gave speeds of 33mbps)

Edited by Tipper2772 (Fri 24-Feb-12 14:24:45)

Check that the network card is set for FULL duplex, and review any other settings it may have.

The router does not know or care what is on the end ... there is a data stream across an Ethernet connection and provided the two ports talk to each other, OS is irrelevant..

In reply to a post by MHC:

Check that the network card is set for FULL duplex, and review any other settings it may have.

Linkspeed/duplex was set to "auto negotiation", I changed this to "100mbps full duplex",
I also noticed a setting "Optimal performance" which was set to disabled - I also enabled this setting and rebooted my pc..... No change in the speed of my connection

Time the time taken to transfer a large 300MB file across the local LAN, if that is close to 60 Meg or faster, then the network card is fine.

Not sure if it was on here, or on the BT care forums, but somebody was getting differing speeds depending on which ethernet port on the HH3 they used, unlikely as it may sound.

In reply to a post by MrSaffron:

Time the time taken to transfer a large 300MB file across the local LAN, if that is close to 60 Meg or faster, then the network card is fine.

I don't think I can do this test at the min.. I only have one pc connected to the lan by ethernet and no spare cable...

In reply to a post by dieselglider:

Not sure if it was on here, or on the BT care forums, but somebody was getting differing speeds depending on which ethernet port on the HH3 they used, unlikely as it may sound.

I used the same ethernet port on the router to connect the w7 pc which gave 30mbps+speeds...

What about copy from one PC (XP) using cable, via the hub, then wireless to the other PC (Win7)?

Yes, my crusty old XP machine (now sadly no longer with us) would never show more than 16 meg on a through out speed test, absolutely fine using a hard wired Win7 machine. I suspect that the dear old thing just wasn't up to the job. It used to do everything else dog-slow as well.

If you wanted to throw some money at it, you could splash out on some more RAM, that would be a start.

In reply to a post by MHC:

What about copy from one PC (XP) using cable, via the hub, then wireless to the other PC (Win7)?
[/quote


ok... just did this through the workgroup and got speeds of 4.8MB/s which is 38mbps, I'm guessing that means the nic card is ok? Hmmmm....

What else??

In reply to a post by Zarjaz:

Yes, my crusty old XP machine (now sadly no longer with us) would never show more than 16 meg on a through out speed test, absolutely fine using a hard wired Win7 machine. I suspect that the dear old thing just wasn't up to the job. It used to do everything else dog-slow as well.

If you wanted to throw some money at it, you could splash out on some more RAM, that would be a start.

I'm starting to think you are right, But what actually causes it? I have 4gb of ram in this pc (although it can only use 3 I think) It pretty usable, not that slow at all otherwise.

In reply to a post by Tipper2772:

I'm starting to think you are right, But what actually causes it? I have 4gb of ram in this pc (although it can only use 3 I think) It pretty usable, not that slow at all otherwise.

What specification is the XP machine? How is the network port connected? Is it on the motherboard or a card? If a card, what type of connector? How old is the machine? What is the CPU ?

In reply to a post by jchamier:

In reply to a post by Tipper2772:

I'm starting to think you are right, But what actually causes it? I have 4gb of ram in this pc (although it can only use 3 I think) It pretty usable, not that slow at all otherwise.

What specification is the XP machine? How is the network port connected? Is it on the motherboard or a card? If a card, what type of connector? How old is the machine? What is the CPU ?

Packard Bell NEC Packard Bell Computer PB34225401


Windows XP Media Center Edition Service Pack 3 (build 2600)
3.05 gigahertz Intel Pentium 4
16 kilobyte primary memory cache
1024 kilobyte secondary memory cache
64-bit ready
Not hyper-threaded

Board: NEC COMPUTERS INTERNATIONAL GA-8I915PMD
Bus Clock: 133 megahertz
BIOS: Award Software International, Inc. 10g 11/25/2005

3072 Megabytes Usable Installed Memory


The network card seems to be part of the motherboard
Realtek RTL8139/810x Family Fast Ethernet NIC
I'm not sure what you mean by the connector.. it just seems to be a small plastic black box thats attached to the motherboard - the socket protrudes out the back of the pc from this.

Pretty old pc - never had any problems with it up to now.

Maybe fire up Task Manager or System Monitor and see if anything starts hogging CPU or memory when carrying out a large download.

Beyond that it's into the realms of checking for network errors, retransmissions, collisions etc.

Some MS guidance on that approach here:

http://www.microsoft.com/resources/documentation/win...
http://support.microsoft.com/kb/148942/EN-US

Definitely a strange one.

to rule out an OS issue, try booting up from a HBCD, hiren boot disk, or a linux ubunto and do a speed test from there.

In reply to a post by Zarjaz:

Yes, my crusty old XP machine (now sadly no longer with us) would never show more than 16 meg on a through out speed test,

My XP does speedtest faster than !6 Meg. Not much faster, admittedly, but sufficient; that's cuz I'm limited by my ADSL2+ copper line, but not by XP.

OK, but I was just empathizing with the OP, as have seen exactly the same symptoms with my kit.
Coincidence then that he happens to have a very old PC also, which also runs XP like mine did.

My machine would happily show 'accurate' tests when I was on G.DMT.

Thanks for all the help/suggestions ppl

Things seem to have taken an even stranger turn tonight...

Just out of curiosity I did another speed test tonight on the thinkbroadband page.. speed = 33mbps!! (1st time ever)

Checked with the thinkbroadband software I have on my pc speed = 16mbps roughly same as usual

Checked on the thinkbroadband website still = 33mbps?

Finally checked speed on speedtest.net = 11mbps??

Can anyone explain WTH is going on here? lol

Check speedtester.bt.com - the ADSL & FTTC Diagnostic, not the beta.

I seem to have the same issue. I just had FTTC installed so have moved from around 6meg to 37meg. Previously I didn't notice much difference in internet connection between my two laptops (Dell D400 running XP and HPG61 running 7) but now while the HP connects at full speed the Dell only manages half. Some of that I put down to a slow g wifi connection but even when wired to the router its slower than the HP.

Alex

In reply to a post by Tipper2772:

Thanks for all the help/suggestions ppl

Things seem to have taken an even stranger turn tonight...

Just out of curiosity I did another speed test tonight on the thinkbroadband page.. speed = 33mbps!! (1st time ever)

Checked with the thinkbroadband software I have on my pc speed = 16mbps roughly same as usual

Checked on the thinkbroadband website still = 33mbps?

Finally checked speed on speedtest.net = 11mbps??

Can anyone explain WTH is going on here? lol

Can you explain those two in more detail? Which test? which software? provides links to teh results.

In reply to a post by MHC:

In reply to a post by Tipper2772:

Thanks for all the help/suggestions ppl

Things seem to have taken an even stranger turn tonight...

Just out of curiosity I did another speed test tonight on the thinkbroadband page.. speed = 33mbps!! (1st time ever)

Checked with the thinkbroadband software I have on my pc speed = 16mbps roughly same as usual

Checked on the thinkbroadband website still = 33mbps?

Finally checked speed on speedtest.net = 11mbps??

Can anyone explain WTH is going on here? lol

Can you explain those two in more detail? Which test? which software? provides links to teh results.

http://www.thinkbroadband.com/speedtest/results/id/1...

http://www.speedtest.net/result/1800445753.png

BT speedtester 13mbps D/L 1.75 mbps U/L

Software is thinkbroadband tbb meter "test = 10mb from multable threads = 7mbps D/L

All these test within 5 mins of each other tonight... on XP pc

?????????????????????????????????????????????????????

In reply to a post by BatBoy:

Check speedtester.bt.com - the ADSL & FTTC Diagnostic, not the beta.

BT speedtester 13mbps D/L 1.75 mbps U/L

It points to network issues!

As for te TBB meter, can you get the EXACT wording, which will be similar to:

tbbMeter last testfile result

You downloaded for 8.0seconds using 0 threads
The file downloaded at a rate of 1310.7KB/sec (10.486Mbps)
The amount downloaded was 10.5MB

Please make sure you use the correct upper and lower case letters too:

b - bits
B - Bytes
M - Mega

reading your line:

Software is thinkbroadband tbb meter "test = 10mb from multable threads = 7mbps D/L

actually says 10 milli bits at 7 millibits per second.

Now I I know that milli bits are not used and it should be Mega, then I also know the fiiel 10 10 MegaByets - so do I assume that you are (incorrectly) using b for Bytes in both case, which would means you achieved 7MB or 56Mb per second. Can you see how important use of b/B or m/M is?

In reply to a post by MHC:

It points to network issues!

As for te TBB meter, can you get the EXACT wording, which will be similar to:

tbbMeter last testfile result

You downloaded for 8.0seconds using 0 threads
The file downloaded at a rate of 1310.7KB/sec (10.486Mbps)
The amount downloaded was 10.5MB

Please make sure you use the correct upper and lower case letters too:

b - bits
B - Bytes
M - Mega

reading your line:

Software is thinkbroadband tbb meter "test = 10mb from multable threads = 7mbps D/L

actually says 10 milli bits at 7 millibits per second.

Now I I know that milli bits are not used and it should be Mega, then I also know the fiiel 10 10 MegaByets - so do I assume that you are (incorrectly) using b for Bytes in both case, which would means you achieved 7MB or 56Mb per second. Can you see how important use of b/B or m/M is?

Yeah.. sorry my mistake.. thanks for pointing that out

10 MB test

You downloaded for 10 seconds using 0 threads
the file downloaded at a rate of 1048.6KB/sec (8.389Mbps)
The amount downloaded was 10.5MB

Network issues? How can I resolve this?

The TBB speedtest and speedtest.net issues are almost certainly down to congestion somewhere in the network and only your ISP can help there. You have proved it is not your PC, cable, network card.

The TBBmeter test - that is an oddity that some seem to suffer from at times - there is a thread in TTTS about it. The figures I quoted were actuals from my PC - but immediately before, I was seeing ~37Mbps on BT, BT Beta, TBB Java and Flash, and speedtest.net, all were giving fairly close readings but the TBBmeter test is often way, way out for me.

In reply to a post by MHC:

The TBB speedtest and speedtest.net issues are almost certainly down to congestion somewhere in the network and only your ISP can help there. You have proved it is not your PC, cable, network card.

The TBBmeter test - that is an oddity that some seem to suffer from at times - there is a thread in TTTS about it. The figures I quoted were actuals from my PC - but immediately before, I was seeing ~37Mbps on BT, BT Beta, TBB Java and Flash, and speedtest.net, all were giving fairly close readings but the TBBmeter test is often way, way out for me.

If that is the case - why is my Windows 7 laptop giving me speeds of +30Mbps on all sites?

Your MTU on XP is 1492. Is that the value TCPOptimizer suggested?

As an outside chance it might be worth trying MTU=1500 on XP.

As a matter of interest TCPOptimizer sets my XP to MTU=1500, but my stupid new Orange BrightBox router limits MTU <= 1492. However I notice no degredation from that.

BT specifically state that on their services it should be 1492 and not 1500. A 2701 Business hub will auto set itself to 1500 on an ADSL line but 1492 on VDSL.

Just a thought worth trying?

But you're saying that MTU is determined by router and so will affect XP and W7 equally?

Could be confirmed by running SG TCP/IP Analyzer from W7 PC.

Edited by XRaySpeX (Tue 28-Feb-12 00:36:45)

No, I was referring to the routers MTU which can also be altered. Your PC should be set with an equal or lower MTU - on XP you set it on Win7 the OS sorts it out.

In reply to a post by MHC:

Your PC should be set with an equal or lower MTU - on XP you set it on Win7 the OS sorts it out.

Yes, exactly!

I've just noticed:

In reply to a post by Tipper2772:

TCP Window: 1027840 (NOT multiple of MSS)

That's because OP's RWIN is multiple of MSS = 1460 corresponding to MTU = 1500. That's a clue

Looks like I'm on the right track only in reverse .

The OP's XP has MTU = 1500 with corresponding RWIN set by TCPOptimizer but his router has MTU = 1492, violating the rule you just stated. What he should do is get TCPOptimizer to set XP's MTU = 1492 with corresponding RWIN (1045440 I compute).

Edited by XRaySpeX (Tue 28-Feb-12 01:03:53)

In reply to a post by Zarjaz:

Yes, my crusty old XP machine (now sadly no longer with us) would never show more than 16 meg on a through out speed test, absolutely fine using a hard wired Win7 machine. I suspect that the dear old thing just wasn't up to the job. It used to do everything else dog-slow as well.

If you wanted to throw some money at it, you could splash out on some more RAM, that would be a start.

Just to throw a spanner into the works

now i am not sure how relevant this is,but i have a few machines here. 2 of them are win xp pro with 2gb of ram and p4 2.6GHz .

both systems can max out my 100Mb connection without any issues.

hope this helps regarding the question: are xp systems compatible with modern day connections


edit: just did a quick speed test using one of the xp pro systems .

http://speedtest.e-capture.net/

Your Result:
Download Speed: 96456 kbps (12057 KB/sec transfer rate)
Upload Speed: 7046 kbps (880.8 KB/sec transfer rate)
28 February 2012 04:26:39

Edited by djfunkdup (Tue 28-Feb-12 04:27:42)

Just to double check can you post a screenshot of TCPOptimizer and DRTCP, you will need to change the drop down to your wired network card. Mine are below for comparison.

I'm on xp and have been getting full speed with these settings for 16 months now:
TCPOptimizer Screenshot
DRTCP Screenshot

No matter how slow your pc/laptop is, it's probably faster than the modem which is capable of pushing 100Mb, so I'd say it's unlikely to be a lack of horse power. A rubbish / faulty network card or borked drivers is more likely imo.

Just a thought - you haven't got any banking software protection?
I was running RAPPORT and the XP system slowed down massively - removed it and suddenly the whole computer cam alive again, and XP equalled my Windows 7 results.
Cheers

In reply to a post by meteosat:

Just a thought - you haven't got any banking software protection?
I was running RAPPORT and the XP system slowed down massively - removed it and suddenly the whole computer cam alive again, and XP equalled my Windows 7 results.
Cheers

Same here as I bank with Cahoot and I received an e-mail some time ago saying that I can download RAPPORT for free.

I had it installed for quite a while until it started slowing down my internet browsing so I ditched it.

I thought you may have been on to something here..

But after changing my tcp settings there is absolutely no change in speeds

« SpeedGuide.net TCP Analyzer Results »
Tested on: 2012.02.29 14:16
IP address: 91.125.xxx.xxx
Client OS/browser: Windows XP (Firefox 6.0.2)

TCP options string: 020405ac0103030401010402
MSS: 1452
MTU: 1492
TCP Window: 1045440 (multiple of MSS)
RWIN Scaling: 4 bits (2^4=16)
Unscaled RWIN : 65340
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 41818kbps (5227KBytes/s)
BDP limit (500ms): 16727kbps (2091KBytes/s)
MTU Discovery: ON
TTL: 52
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)


http://www.thinkbroadband.com/speedtest/results/id/1...

http://www.speedtest.net/result/1804857163.png

if anything they are slightly worse...

My routers MTU is set to 1492

(XP pc)

I'll do the W7 in pc tests in a following message..

« SpeedGuide.net TCP Analyzer Results »
Tested on: 2012.02.29 14:43
IP address: 91.125.xxx.xxx
Client OS/browser: Windows 7 (Firefox 10.0.2)

TCP options string: 020405ac0103030201010402
MSS: 1452
MTU: 1492
TCP Window: 66792 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16698
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 2672kbps (334KBytes/s)
BDP limit (500ms): 1069kbps (134KBytes/s)
MTU Discovery: ON
TTL: 116
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

http://www.thinkbroadband.com/speedtest/button/13305...

http://www.speedtest.net/result/1804915761.png

(W7 PC)

In reply to a post by meteosat:

Just a thought - you haven't got any banking software protection?
I was running RAPPORT and the XP system slowed down massively - removed it and suddenly the whole computer cam alive again, and XP equalled my Windows 7 results.
Cheers

I used to use Rapport - but i havn't since last year

I hesitate to repeat it, but I suspect there's something amiss with the one machine giving the problems, nothing any more sinister than that.

Clearly I was misleading in mentioning that my old XP machine showed similar issues, and that some readers thought I was pointing the finger at the OS itself. I wasn't.

I posted TCP optimiser settings

Any suggestions?

Your settings seem ok so now you need to rule out the OS completely.

Download linux, boot it from a cd or usb stick and run a speed test.

http://www.ubuntu.com/download/ubuntu/download

So did I

In reply to a post by Tipper2772:

But after changing my tcp settings there is absolutely no change in speeds

Presume you rebooted XP before doing speed tests? Think TCPOptimizer tells you to.