pci express version's relation with performance

It only matters for 4-5 fps gain AFAIK. I am not sure though.

ok, thanks, but i need more details

Check this it might help
PCI Express 3.0, PCIe 2.0 and PCIe 1.1 Interface Differences

Version just tells you how much max bandwidth will be available. Higher the PCI-express version number, more the bandwidth available.

But not much difference in performance. Hardly 1 or 2~ fps which can be counted as a 'real world error'. The current generation of cards aren't even utilizing the full bandwidth of PCI-express 1.1 X16 slot.

My HD 6950 is a PCI-express 2.1 card. But it is hardly fast enough to utilize 1.1 X16 at the fullest. I'm going to see negligible performance difference whether it is plugged in 1.1 X16 slot or 2.0/2.1 X8 slot.

u can check out this link too -
Differences between PCI-Ex16 1.0 and 2.0? - Tech Support Forum

thankyou very much tenida, ico , sam1.

so i am concluding that either it is pcie x16 v1.0 or 2.0 or 3.0, there is no difference (negligible) in gameplay performance or no difference in card performance.. right?

friends, tell me one more thing, is version has something to do with power consumption of card?

As of now there isn't. But PCI-express 1.1 might get saturated soon for graphic cards. 1.1 is only found in old motherboards anyways. New motherboards are coming with 2.0 and above. Soon we'll see 3.0 around March when AMD and Intel release their new processors.

No, PCI-express has nothing to do with the power consumption of the card.

Even if there is a difference, it would be merely 4-5 watts. Now 4-5 watts would translate into 0.005 * 24 * 365 * 1.5 = Rs. 65.7 if you run the card non-stop for one year.

PCIe 3.0 (and for that matter, even 2.0) was mainly introduced to provide adequate bandwidth for dual graphics card setups. The performance difference between PCIe 1.x and 2.0 depends on a variety of factors such as your GPU, chipset, the specific application/game (for example, in some games, PCIe 2.0 may make a bigger difference on an NVIDIA card than a Radeon, and vice versa), etc.

Just for information, PCIe 2.0, taking into account bandwidth overheads, delivers about 4GT/s in and out. The fastest PCIe 2.0 implementation known to date is the nForce 780 series which runs part of the bus at 4.5 GT/s (of course, practical performance difference is NIL because the additional nForce 200 chip adds latency too. However, multi card performance does show a marginal improvement on these nForce boards).

There is some evidence that the current generation cards do saturate the PCIe 1.1 bus. A good read on the matter can be found here:

The impact of PCI Express on GPUs (page 1: Introduction) - BeHardware

It shows that on a GTX 570 or an HD 6970, the performance difference between PCIe 2.0 x16 and x8 (which is the same as PCIe 1.x) is about 8%.

Thus, the practical conclusion is that if you have anything less than a 560 Ti/HD 6950, PCIe 2.0 will not make a difference for a single card configuration. However, it makes quite the difference for dual GPU setups and higher end graphics cards.

SLI on 580s and 570s at x8 x8 has noticable performance drops.

And are there any problems to fit the graphics card into the port? For example,heard a rumour that ati 7xxx series cards are going to be pci 3 compliant. So going by the above discussions and links, I take it that one can run the 7xxx series cards on a pci 2.0X16 board?

Jripper said:

And are there any problems to fit the graphics card into the port? For example,heard a rumour that ati 7xxx series cards are going to be pci 3 compliant. So going by the above discussions and links, I take it that one can run the 7xxx series cards on a pci 2.0X16 board?

Click to expand...

*www.thinkdigit.com/forum/graphic-c...ormation-regarding-graphic-cards-newbies.html

^^ I've explained everything here.

In short, yes.

Will the PCI.E 3 revision still supply the 70-75W which the current version supplies.

@Ico Nice article