Graphic card on PCIE2?

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   Depending on your CPU (I don't know the specs of the i9-7900x), you might want to install it to PCIE3 instead. From your motherboard's manual:

4 x PCI Express 3.0 x16 Slots* 
* If you install CPU with 44 lanes, PCIE1/PCIE2/PCIE3/PCIE5 
will run at x16/x8/x16/x0 or x8/x8/x16/x8.
* If you install CPU with 28 lanes, PCIE1/PCIE2/PCIE3/PCIE5 
will run at x16/x0/x8/x0 or x8/x0/x8/x8.
* If you install CPU with 16 lanes, PCIE1/PCIE2/PCIE3/PCIE5 
will run at x16/x0/x0/x0 or x8/x0/x4/x0.

Edited by PetrolHead - 27 Dec 2017 at 2:36pm

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PetrolHead Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 07 Oct 2015 Status: Offline Points: 403	Post Options Post Reply Quote PetrolHead Report Post Thanks(0) Quote Reply Topic: Graphic card on PCIE2? Posted: 27 Dec 2017 at 2:36pm
	Depending on your CPU (I don't know the specs of the i9-7900x), you might want to install it to PCIE3 instead. From your motherboard's manual: 4 x PCI Express 3.0 x16 Slots* * If you install CPU with 44 lanes, PCIE1/PCIE2/PCIE3/PCIE5 will run at x16/x8/x16/x0 or x8/x8/x16/x8. * If you install CPU with 28 lanes, PCIE1/PCIE2/PCIE3/PCIE5 will run at x16/x0/x8/x0 or x8/x0/x8/x8. * If you install CPU with 16 lanes, PCIE1/PCIE2/PCIE3/PCIE5 will run at x16/x0/x0/x0 or x8/x0/x4/x0. Edited by PetrolHead - 27 Dec 2017 at 2:36pm
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sohleks Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Dec 2017 Status: Offline Points: 7	Post Options Post Reply Quote sohleks Report Post Thanks(0) Quote Reply Posted: 27 Dec 2017 at 2:26pm
	I've heard the performance difference is extremely minimal. Like 1%. And even then that might've been because they were testing a high end gpu like that in a 8x slot and your nice mobo like that would have two x16 slots. Current gen cards hardly max out on a pci gen 3 8x slots. The largest difference would probably just be thermals IF it's like blowing hot air right against like a power supply shroud. Edited by sohleks - 27 Dec 2017 at 3:03pm

PistolPat Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Dec 2017 Location: Texas Status: Offline Points: 3	Post Options Post Reply Quote PistolPat Report Post Thanks(0) Quote Reply Posted: 27 Dec 2017 at 1:43pm
	I have: Fatal1ty X299 Professional Gaming i9 XE i9-7900x 32 gb of memory ASUS ROG STRIX GeForce GTX 1080TI OC Edition My graphic card is very long and it is blocking USB3_5_6. Can I install my graphic card on PCIE2? Will it affect the performance? If it does affect performance, what are my options? Thanks for your help.