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pci e bus/ gpu question

post #1 of 15
Thread Starter 
a pci-e x16 bus has a transfer rate of 4 GB/s, how much of that does your latest gpu's use and were do you find that info for specific cards?
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post #2 of 15
You shouldent worry, PCI-E X16 2.0 is doube bandwitch of 1.1
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post #3 of 15
Quote:
Originally Posted by drewfus View Post
were do you find that info for specific cards?
You don't.
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post #4 of 15
Thread Starter 
Quote:
Originally Posted by Sanders54 View Post
You shouldent worry, PCI-E X16 2.0 is doube bandwitch of 1.1
lol, i know, but its funny it seems like such a simple question and its the second time iv posted this yet no body knows the answer and i just think its info that should be known for grins.
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post #5 of 15
Thread Starter 
Quote:
Originally Posted by Blameless View Post
You don't.
elaborate please
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post #6 of 15
It's an essentially unanswerable question.

Asking how much of the PCI-E bandwidth is being used is like asking how much memory bandwidth a given system/CPU uses.

The only real answer is somewhere between zero and the maximum bandwidth the device supports. On all but the slowests PCI-E 16x cards, you will probably saturate the bus...for fractions of a second at a time.
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post #7 of 15
Thread Starter 
Quote:
Originally Posted by Blameless View Post
It's an essentially unanswerable question.

Asking how much of the PCI-E bandwidth is being used is like asking how much memory bandwidth a given system/CPU uses.

The only real answer is somewhere between zero and the maximum bandwidth the device supports. On all but the slowests PCI-E 16x cards, you will probably saturate the bus...for fractions of a second at a time.
+rep for the best answer iv been given , but it still seems that this would be
able to be determined/ measured , i mean i think every one would agree that a 8800 ultra uses more of the bus than a 8800gs , so with that being said knowing there is a difference , some how you should be able to measure the difference , one would think at least?
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post #8 of 15
i think the only way to get a ruff idea of how much is being used is to set the frequency at different amounts(1x,4x,8x,16x) and bench them
post #9 of 15
Quote:
Originally Posted by Sanders54 View Post
You shouldent worry, PCI-E X16 2.0 is doube bandwitch of 1.1
Not like we maxed out 1.1 Yet.....


PCIE 2.0 shows an average of 4% gain over pcie 1.1 from the benches i saw.
post #10 of 15
Even some of the best cards today really aren't impacted by PCI-E x8. In SLI tests on a 650i board I think the biggest difference was about 8 FPS but that's going based on a very foggy memory.
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