Yes ^^

[edit] that will teach me to read.

the XPS 720 uses an NVIDIA 680i chipset and is NOT PCI-E 2.0 compliant.

Even the new NVIDIA 780i chipset which is PCI-E 2.0 compliant uses a bridge chip to the same 680i northbridge, so it isnt truely PCI-E 2.0 either.

Only the DDR3 790i is native PCI-E 2.0 for nvidia 

Regardless, performance via PCI-E 1.0 or PCI-E 2.0 is almost identical with today's graphics cards. 

Hello again,

The other question that comes to mind is why does DELL use the Nvidia chipset instead of the Intel chipset. Is the Intel chipset something all together different, or doesn't Intel make a chipset for SLI ? Or does this have anything to do with SLI ? What about AMD/ATI?  

Later I will swap the 750W PS with the DELL 1000W PS kit and go SLI. I have two 8800 GTX 768MB cards I can use. NOW they start coming out with dual GPUs on a single board. Wonder if I should try that first.

I remember back in the late '90s when I purchased the QUANTUM 3D DUAL VOODOO 2 card. Did not need SLI for that baby. It had 2 GPUs, with one of them being on a daughter board. It was big and expensive for the time but it sure worked great compared to Nvidia in those days. 

Thanks,

But, why the promotion on some of the new cards that say they are PCIe 2.0 ready. Are they supposed to be notably faster on the 2.0 bus instead of the 1.0 bus?