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Modem Burst Speeds???

706 Views 1 Reply 2 Participants Last post by kiwiguy, Apr 11, 2004

scmazter

Discussion Starter · Apr 11, 2004

Yo, it was either this or hardware, but I think posting it here is better.

Anyway my modem usually connects at 48,49,50 and 52 Kb/s.
The theoretical maximum speed I can download with is 8KB/s, but you know how if u're starting to download something off a server (eg. patch for starcraft), in the first one or two seconds the speeds can be insane, like 60KB/s. And it actually works, because it says (62/180kb), so in the first second it actually downloads data at that speed.

So my question is, why can't it always download stuff at that speed? Is it just a data burst mode kinda like DMA???

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kiwiguy

· #2 · Apr 11, 2004

Before Windows can report the speed, it downloads a bit at normal (full speed), then does a calculation of the speed.

In other words it does some pre-caching of the file.

Then it carries on loading the file and reports the speed but includes the portion already cached, so it just looks like its running fast.

Its only that its counting the portion pre-loaded in the equation. It happens on broadband as well, giving "impossible" starting speeds.

The true speed is not what is reported.

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