Can I run two GTX 970 in SLI using 16X/8X PCI Gen 3.0

[drwoodcomb]

I just bought an X99 chipset motherboard with an i7-5820K processor. Since its a 28 lane processor I assumed that I would be able to run one of my GTX 970s with 16x and the other GTX 970 at 8x. When I look in the BIOS is says they are both running at 8X. I contacted my motherboard manufacturer and the woman at ASUS said that there is no way to make one run at 16X and the other at 8X. She said that they both have to run at 8X. Is this true or is she full of it and doesn't know what she is talking about

 

[Platerpus7]

Im afraid she's not full of it. The 5820 really is not built for 2 cards. You want the 5930.

 

[1LiquidPC]

There are reviews showing almost no gaming difference (except BF4)in 2-way SLI benchmarks with 28-lane vs 40-lane 5930k. It looks to be "close enough" unless your going w/ 3-way SLI.

 

[1LiquidPC]

Forgot the link. http://www.anandtech.com/show/8426/the-intel-haswell-e-cpu-review-core-i7-5960x-i7-5930k-i7-5820k-tested/6