Question regarding PCIe and PCIe 2.0

[MayheM]

So I have a desktop at home and the motherboard has two PCIe slots, The card I have is a PCIe 2.0 card. Granted it will not run as fast but would that actually cause issues? Like could it cause driver fail issues? I am looking at replacing the motherboard some time soon and just don't know if it is even worth it if it will not fix the issue I am having.

Thanks guys...

[CorporalAris]

No? The bandwidth on PCI-e x16 2.0 is just higher. But chances are, you won't be hitting that with any card. SOOOO.... No, no probs.

[MayheM]

Strange, I don't know what the issue with this damn thing is. I have stopped thinking about it for a while and put my two 9800's back into the machine, but it popped into my head today and I figured I would check in about it.

[xoqolatl]

PCI-Express 2.0 has double the number of transfers per clock, which means that in best case scenario bandwidth can be doubled. Almost all PCI-E 2.0 cards work fine in PCI-E 1.1 slots. What card do you have? when exactly does the driver crash? Driver crashes usually mean unstable overclock or overheating GPU.

[Psy]

This shit confused me as well. :\

[Aus_Karlos]

Ive seen no bandwidth difference between PCI-E x16 and PCI-E 2.0. Although there are some technical differences like the amount of voltage and resistance through the slot itself. PCI-Ex16 uses 1.2v @ 90Ohms. PCI-E 2.0 uses 1.0v - 1.1v @ 80Ohms.
I can only guess that Card manufactures have yet to release a card that is capable of utilizing all the bandwidth lanes properly.

@ MayheM what PSU are you using. For 2x 9800GT (X,S) you need at least 950W with 12v @ 72A. I use to run 2x 9800GTX on a 1000W PSU with no problems, i upgraded to 2x GTX280 and thought that my Corsair HX1000W would be sufficient but kicked it about 2 weeks ago under the stress.
Now have a ThermalTake ToughPower 1200W.

[xoqolatl]

Ive seen no bandwidth difference between PCI-E x16 and PCI-E 2.0. Although there are some technical differences like the amount of voltage and resistance through the slot itself. PCI-Ex16 uses 1.2v @ 90Ohms. PCI-E 2.0 uses 1.0v - 1.1v @ 80Ohms.
I can only guess that Card manufactures have yet to release a card that is capable of utilizing all the bandwidth lanes properly.

Sorry sir, but this is nonsense. There are technical differences between PCI-E 1.1 and PCI-E 2.0 on physical layer, which mostly affect signaling rate. I don't know what voltages and resistances "through the slot" are you talking about, either. Both PCI-E 1.1 and 2.0 use low voltage differential signaling, where both lines are decoupled with 120 Ohm resistor and have maximum peak-to-peak voltage swing of 0.12 V. PCI-E slots have 12 V and 3.3 V power lines - there's no "1.0v - 1.1v". You can read about PCI-Express here, here or here or in lots different places.

@ MayheM what PSU are you using. For 2x 9800GT (X,S) you need at least 950W with 12v @ 72A. I use to run 2x 9800GTX on a 1000W PSU with no problems, i upgraded to 2x GTX280 and thought that my Corsair HX1000W would be sufficient but kicked it about 2 weeks ago under the stress.
Now have a ThermalTake ToughPower 1200W.

I don't want to be impolite but I can't let this post stay here and deceive people: this is wrong, too. Would you like me to show you a 2x 9800GTX system with an extremely overclocked Core 2 Duo CPU running fine on a 750 W PSU? or a 2x GTX295 system with overclocked Core i7 running fine on a Corsair HX1000?

[MayheM]

@ MayheM what PSU are you using. For 2x 9800GT (X,S) you need at least 950W with 12v @ 72A. I use to run 2x 9800GTX on a 1000W PSU with no problems, i upgraded to 2x GTX280 and thought that my Corsair HX1000W would be sufficient but kicked it about 2 weeks ago under the stress.
Now have a ThermalTake ToughPower 1200W.

I have a BFG 1250w power supply. Power is not an issue. I have actually been talking to the guys at BFG since they made the card and power supply I am using. They said I can send it in for testing/replacements.