PCIe 2.0 vs 1.1 (16x) - Performance hit?

[stormy]

Hi,

With me looking to upgrade my faulty X1900XT, at the moment I have an Asus P5K Deluxe/WIFI-AP board which is an Intel P35 chipset and PCIe 1.1.

What performance hit will there be with the new PCIe 2.0 cards in the PCIe 1.1 (16x) slot? I don't really want to be upgrading the motherboard just yet as its got lots of life left.

Cheers,

Mike

[WoLFe]

Don't quote me on this but I have heard it is suprisingly small.

[SiM]

quote me on this it is surprisingly small

for the current range of cards...

[Blitzen]

quote me on this it is surprisingly small

for the current range of cards...

Can i ask how you know this?
Im not being funny, i just havent seen anything anywhere to prove or disprove it.

I agree there wouldnt be a difference if the motherboard was still the older PCI-E slot, but what about if the motherboard has the PCI-E 2.0 to go with the same standard card?

There must be some difference or they wouldnt have bothered.

[LuckyNV]

With current cards there shouldn't be any difference (or very minor at best) simply because current cards do not require the huge bandwidth PCI-E 2.0 slot can provide.

its sort of the same argument as AGP 4x vs AGP 8x back in the day, difference was minor at best, by the time bandwidth hungry AGP cards arrived (AGP 7800 or HD3850 for example) the slot was long considered obsolete.
same goes for PCI-E 1.x vs PCI-E 2.0 for the time being.

PCI-E 2.0 not only provides more bandwidth but also more power through the slot, no card relies on this feature yet as external power connectors are sufficient. They'd also shoot themselves in the foot if any GFX card right now needed a PCI-E 2.0 slot since there aren't exactly many with the support.

[kalniel]

And they'd be breaking SIG PCI-E spec to do so.

Cards aren't even at the bandwidth supported by PCI-E 1.0 yet. (PCI-E 1.0a is 2.5 GT/s, GTX 280 internal bandwidth is still only 1.0 GT/s)

[SiM]

Can i ask how you know this?
Im not being funny, i just havent seen anything anywhere to prove or disprove it.

I agree there wouldnt be a difference if the motherboard was still the older PCI-E slot, but what about if the motherboard has the PCI-E 2.0 to go with the same standard card?

There must be some difference or they wouldnt have bothered.

Well simply because performance with PCI-E 2.0 card in a PCI-E 2.0 board equals the performance with PCI-E 2.0 card in a PCI-E 1.1 board... give or take 1-2 fps... They bothered with PCI-E 2.0 for 2 reasons:
1) future proofing. If quad gpu cards come out PCI-E 1.1 might bottleneck...
2) money. They can charge more money for it and it probably costs about the same to make...

[stormy]

Thanks for the replies guys, guess it should not be an issue putting a 2.0 card in my P35 board for now.