Originally Posted by TheBlindDeafMute
I don't get it. So, X79 doesn't have pcie 3.0 enabled by default?
SB-E by default supports PCIe 3.0. Nvidia is saying that they have an experimental driver to use PCIe 3.0 on GeForce 600 series.
And that graph there is a 4-way SLI setup, unless you will be running such extreme setup, ignore it.
Originally Posted by Sexparty
The motherboard manufacturers and Intel are to blame not Nvidia. Sure this should have happened a lot quicker but oh well. X79 isn't native
PCIe 3.0 and that's why there is this problem. It wasn't built to be native but built with increased bandwidth to cope with PCIe 3.0 speeds when the hardware came out. Sure it works without issue in a good quality board but in ones that weren't made to the standard of course they won't work. The manufacturing process of the boards is the problem. As a whole X79 wasn't built to the exact PCIe 3.0 standard, so it isn't native and that's okay but you'll find revision 2.0 boards/good quality boards will all be manufactured properly and be no different from Z77 PCIe 3.0. It's the early releases/sub-par boards that are the problem I'm assuming. It's hard to tell what exactly was the case and in which boards but reading up on what happened with Z68 and Z77 it's pretty easy to assume similar things were done.
I disagree. When Intel released SB-E, there was no PCIe 3.0 GPU on the market, so Intel have no way of testing whether on-die PCIe 3.0 controllers was working correctly or not. See this image (footnote to be exact)
Intel did build X79 around PCIe 3.0 natively. I am not sure what is going on at Nvidia side, since AMD does PCIe 3.0 without hickup.
As for Z68 vs Z77, motherboard manufacturers initially believed that Ivy Bridge will use PCIe 2.0, hence early P67/Z68 motherboards used PCIe 2.0 controllers. Only when Intel announced PCIe 3.0 support on Ivy Bridge did motherboard manufacturers used PCIe 3.0 controller and rebrand it as Gen3 motherboard.Edited by trumpet-205 - 6/21/12 at 12:37pm