Am I doing this speed calc correctly?

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.

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

I've got you. Thanks.

Something strange going on then?

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)

Connected via wireless or ethernet?

I use this calculator to cheat when I am too lazy to work it out:

http://www.dslreports.com/calculator

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.

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.

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.

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

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.