question about pci express 2.0

pci-e 1.1 vs 2.0

Double the frequency. Equates to double the data throughput. So pci-e 2.0 at 16x equals the speed of pci-e 1.1 at 32x. Another fact about 2.0 is that it can provide 200 watts of power to the card vs 1.1's 75 watts. As of now the current generation of GPU's do not even take up the bandwidth of 1.1, but it is always nice to pave and enlarge the roads before the traffic becomes to great (I just wish the gov. would think that way).

Actually that's 150W, and that's the spec support, few MoBo makers actually added the hardware to support the power requirement, so while most meet the frequency upgrade, a very small minority of MoBos have the ability o supply 150W through the slot.

BTW, the power spec has been made a separate part of the PCI-SIG specs, (kinda like what happened with SATA), the next specs is PCIe 225/300W 1.0 spec (it got ratified in April);
http://www.pcisig.com/specificatio [...] _graphics/

I think it will happen once there's a major board shift, so IMO, Nehalem is your best bet to see someone actually ensure the power specs are followed to some extent. And with Larrabee pulling down some serious watts too, expect intel to ensure the 225-300W spec on their launch at some point leading up to it.

Nothing to back that up, just my view from this end of the beer bottle.