General Discussion
  >> Fibre Broadband


Register (or login) on our website and you will not see this ad.


  Print Thread
Standard User mrnelster
(member) Wed 06-Apr-11 21:10:01
Print Post

Am I doing this speed calc correctly?


[link to this post]
 
My speed tests always come back between 1.5 and 2Mbps.
But downloads always seem very slow on my PS3.

58MB file = 20 mins

58 x 1024 = 59,392 Bytes
Change to bits
Multiply by 8 = 475,136 bits
Change to bits per minute
Divide by 20 = 23,756.8 bpm
Change to bits per second
Divide by 60 = 395.946667 bps
Change to megabits per second
Divide by 1000 = 0.396Mbps

At 1.7Mbps I would expect it to take approx. 4.66 minutes.

My PS3 reports the same speedtest results as my PC. My friends PS3's all download the same files very quickly and with respect to their speed test averages, so I dont think it is PSN network capacity/contention.

Could BT be causing my problem?

Ta.

Knowing how it works is completely different to understanding how it works.
Standard User XRaySpeX
(knowledge is power) Wed 06-Apr-11 21:35:39
Print Post

Re: Am I doing this speed calc correctly?


[re: mrnelster] [link to this post]
 
Yes, all your numbers are correct but your units, between "Bytes" & "bps", are K (1000) too small, e.g.
In reply to a post by mrnelster:
58 x 1024 = 59,392 Bytes
should read
58 x 1024 = 59,392 KBytes


1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU BB => 2010: Orange 19 Meg Tweaked / 16 Meg Untweaked LLU BB
Standard User mrnelster
(member) Wed 06-Apr-11 23:50:10
Print Post

Re: Am I doing this speed calc correctly?


[re: XRaySpeX] [link to this post]
 
I've got you. Thanks. smile

Something strange going on then?

Knowing how it works is completely different to understanding how it works.


Register (or login) on our website and you will not see this ad.

Standard User Dash
(learned) Thu 07-Apr-11 13:53:14
Print Post

Re: Am I doing this speed calc correctly?


[re: mrnelster] [link to this post]
 
You're getting a suspiciously slow 50KB/sec (compared to your predicted 217KB/sec)

Not being familiar with the world of the PS3 - where are you downloading this file from? How is your PS3 connected to your router? Can you download this file independently on your PC and if so, what speed do you see there?


Is BT screwing with you? Well it's BT, so highly likely.

Edited by Dash (Thu 07-Apr-11 13:55:27)

Administrator MrSaffron
(staff) Thu 07-Apr-11 17:22:21
Print Post

Re: Am I doing this speed calc correctly?


[re: mrnelster] [link to this post]
 
Connected via wireless or ethernet?

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User nahwiseup
(committed) Thu 07-Apr-11 17:35:01
Print Post

Re: Am I doing this speed calc correctly?


[re: mrnelster] [link to this post]
 
I use this calculator to cheat when I am too lazy to work it out:

http://www.dslreports.com/calculator

ADSL24 FTTC (Fibre 30 PRO)

My online photos!
http://jim-cara.fotopic.net
Standard User mrnelster
(committed) Thu 07-Apr-11 21:36:03
Print Post

Re: Am I doing this speed calc correctly?


[re: Dash] [link to this post]
 
In reply to a post by Dash:
You're getting a suspiciously slow 50KB/sec (compared to your predicted 217KB/sec)

Not being familiar with the world of the PS3 - where are you downloading this file from? How is your PS3 connected to your router? Can you download this file independently on your PC and if so, what speed do you see there?


Is BT screwing with you? Well it's BT, so highly likely.


Hi

Its via the Playstation network so I'm not too sure. I am connected wirelessly, but in the same room and the PS3 reports the same speeds under test as my PC does.

I know wireless connections aren't foolproof but for normal downloading it shouldn't slow down like that.

The set up was identical on Sky and never suffered for downloading. Fluctuations in gaming latency yes, but not for downloads.

Knowing how it works is completely different to understanding how it works.
Standard User mrnelster
(committed) Thu 07-Apr-11 21:40:02
Print Post

Re: Am I doing this speed calc correctly?


[re: nahwiseup] [link to this post]
 
In reply to a post by nahwiseup:
I use this calculator to cheat when I am too lazy to work it out:

http://www.dslreports.com/calculator


Really useful tool. Thanks for that. smile

Knowing how it works is completely different to understanding how it works.
Standard User RobertoS
(sensei) Thu 07-Apr-11 22:05:30
Print Post

Re: Am I doing this speed calc correctly?


[re: mrnelster] [link to this post]
 
In reply to a post by mrnelster:
The set up was identical on Sky and never suffered for downloading. Fluctuations in gaming latency yes, but not for downloads.
Maybe lots of neighbours have started using or increased their wireless usage since then. I just started up InSSIDer 2 and can see ten active routers plus mine. During the daytime or if I move closer to the front of the house I can often see 20 or so.

If you haven't used such a tool, download this one. It also gives you a graph showing which are overlapping with your channel. If a lot, you can see the best spot to change to.

Edit - now 15 plus mine. Not moved.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

Edited by RobertoS (Thu 07-Apr-11 22:29:17)

Standard User RobertoS
(sensei) Thu 07-Apr-11 22:09:51
Print Post

Re: Am I doing this speed calc correctly?


[re: mrnelster] [link to this post]
 
Not being awkward, but am I missing something here?

What has this got to do with Fibre Broadband? Your profile sats BT Total Opt 3 up to 20Mbps, but if that's not of date and you are on FTTC/Infinity these are atrocious speeds.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.
  Print Thread

Jump to