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Will a graphics card with pcie 2 0 lose any performance when plugged into a pcie

Last response: in Graphics & Displays
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April 5, 2010 8:09:08 AM

Hello,
i am looking at buying an nvidia geforce 220 0r 240 GT or 9400 GT, my mother board has only pci express but these cards specify pci-express 2.0.
I know they will work with my connection but will there performance be reduced by connecting via pci-express instead of pcie 2.0.
If the performance is reduced i might aswell buy the cheapest?
a b U Graphics card
April 5, 2010 8:19:19 AM

A PCI Express 2.0 lane, IIRC, simply has double the bandwith of a PCI Express 1.1 lane. I doubt that either a GeForce 9400GT, GT 220 or GT 240 would use the bandwith of a PCI-e 1.1 16x lane, so, you would not find any performance loss - with those cards. I suggest you get a GeForce 9600GT instead of either of those cards.
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a c 84 U Graphics card
April 5, 2010 9:00:18 AM

http://www.techpowerup.com/reviews/NVIDIA/GTX_480_PCI-E...
if gtx480 loses 2% of performance when in a x8 2.0 (=x16 1.1), those cards won't lose anything
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a c 152 U Graphics card
April 5, 2010 9:06:39 AM

An HD5870, a very fast card, runs identically at x8 mode in a x16 PCIe version 2 slot. So you could theoretically use up to an HD5870, however you couldn't purchase a fast enough CPU for a board that has no PCIe v2 slots.

In fact, most graphics cards would soon be CPU-limited in such a system. For example, an HD4770 is a little more than an X2-4800+ AMD CPU can support and your CPU would be lucky to have a third of the processing power as that CPU.
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a c 84 U Graphics card
April 5, 2010 9:15:27 AM

photonboy said:
and your CPU would be lucky to have a third of the processing power as that CPU.
ummm I dont think he has mentioned his cpu yet....
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April 5, 2010 9:37:46 AM

i have a similar question.

is my ga-g41m-es2l (micro mobo from gigabyte) pcie 2.0?
if it isn't will i lose any performance with an 5850?

with q9550
4gb
1920x1080 moni
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a c 84 U Graphics card
April 5, 2010 10:23:24 AM

x8 2.0 =x16 1.1(or 1.0), same bandwidth
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April 5, 2010 10:27:16 AM

Kari said:
x8 2.0 =x16 1.1(or 1.0), same bandwidth

nice to know thnx.

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April 5, 2010 1:06:56 PM

i run an xfx 4770 in a pci-e 1.1 slot and noticed little to no performance increases when we poped the card into my friends computer that had pci-e2.0. He even has a 955 BE and i run a 9150e
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April 7, 2010 7:32:42 AM

Best answer selected by sackman.
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