Need help getting pcie Gen 3 speeds on my gaming pc... =(

[B_Parker]

I haven't been able to achieve PCIE 3.0 speeds and it looks like it's my CPU... here's the Intel link that says it's PCIE 2.0, not 3.0. I'm using a Intel Core i7-3820 Sandy Bridge-E 3.6GHz (3.8GHz Turbo Boost) LGA 2011 130W Desktop Processor BX80619i73820, ASUS Rampage IV Gene LGA 2011 Intel X79 SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard, and a ASUS GTX780-DC2OC-3GD5 GeForce GTX 780 3GB 384-Bit GDDR5 PCI Express 3.0 HDCP Ready SLI Support Video Card.

Intel® Core™ i7-3820:
http://ark.intel.com/products/63698/Intel-Core-i7-3820-Processor-10M-Cache-up-to-3_80-GHz

My full system specs can be viewed from the pcpartpicker.com saved parts list link below. But, the GPU is the Asus GeForce GTX 780 3GB DirectCU II Video Card.



http://pcpartpicker.com/user/spot/saved/4sH1

Can anyone tell me if I can 100% sure get gen 3 speeds with these other CPUs with my setup?

Intel Core i7-4820K Ivy Bridge-E 3.7GHz (Turbo 3.9GHz) LGA 2011 130W Desktop Processor BX80633i74820K

Intel Core i7-4930K Ivy Bridge-E 3.4GHz LGA 2011 130W Desktop Processor BX80633i74930K

Also, I want to do SLI if those gen 3 speeds become possible with a different CPU. What power supply wattage is recommended for my gaming pc system? I have a Corsair Professional 850W 80+ Gold Certified Semi-Modular ATX Power Supply, but I'm worried that doing SLI with the GTX 780s would stress my PSU too much.

Thanks! 🙂