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Will a pcie v2.1 video card work in a v1.1 slot?

Last response: in Graphics & Displays
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April 7, 2011 12:28:57 PM

Will a pcie v2.1 video card work in a v1.1 slot?

More specifically, will a AMD HD 6950/6970 work in a v1.1 slot? Has anybody tried it yet?

(I'm using a Asus P5W DH Deluxe (Intel 975X) motherboard.)
a b U Graphics card
April 7, 2011 12:33:09 PM

Yeah it will work but what cpu do you have? I see a major bottleneck coming.
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April 7, 2011 3:41:07 PM

Yea, C2D E6400 @ 2.8 Ghz. However, the plan would be to eventually move the card over to a new build. Other than not being able to take full advantage of the cards capabilities, what negative effects would I encounter?
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a b U Graphics card
April 7, 2011 3:46:41 PM

If you are playing at lower res then 1920x1080 it could bottleneck so badly that card would act lik ea 30$ card lol, other then that it will be ok till you move to new computer.
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a c 358 U Graphics card
April 7, 2011 4:25:27 PM

There have been people who reported problems with a PCI-e 2.1 card in a PCI-e 1.x slot.

Some have stated it is caused by poor implementation of the PCI-e 1.x standard on the motherboard or the chipset. It may or may not work.

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a b U Graphics card
April 7, 2011 5:23:24 PM

I've personaly ran it and never had an issue but jaguarskx is right it may or may not work i would upgrade the rest of your computer before the gpu. IMO
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March 30, 2013 1:46:32 PM

I have a same problem! I bought MSI AMD Radeon HD 6670 2GB GDDR3 but it dont work good. i have pci express x16 1.1 and the gpu is 2.1
It has a reduce of perfomance.i was wanted to play far cry 3 and it didnt play at 60 FPS at 1024x768!!!! You kidding me? Game debate it says that ti plays!!!
PLZ some help! Do i have to change a motherboard?

http://www.game-debate.com/

System Spec--> Intel Core 2 Quad Q6600 2.4GH/z
AMD Radeon HD 6670 2GB MSI
GA-946GMX-S2
3GB RAM
Windows 7 Ultimate 32 Bit

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March 30, 2013 1:52:47 PM

@tsilis, That's not bottlenecking. Far Cry 3 is a hefty game, and the 6670 ddr3 is between 10-20% crummier than the GDDR5 version.

@OP Yeah, but sometimes no. I say go for it, but keep in mind that the 6950 may saturate the 1.1 slot's bandwidth.
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