Gigabyte GTX 980 G1 SLI cant work in PCIE 3.0 on GTX msi x79 gd45 (8D)

[billtaco]

Hi,
I just got 2 Gigabyte GTX 980 G1 for SLI
but Its PCIE 3.0 cant work
My motherboard is msi x79 gd45 (8D)
If Turn on PCIE 3.0 in Its BIOS ==> the monitor is just in whole Dark and My PC will auto-restart repeatedly but cant in the windows even BIOS just in whole Dark Screan
IF Turn off PCIE 3.0 in BIOS setting everything is normal and into Windows (Win 7 64X ultimate)
==> so only can be in PCIE 2.0 16X + PCIE 2.0 16X
CPU : 3930k OC 4.2g
Ram: 16g DDR3 1600


1. please any fix or anything can make PCIE 3.0 work well with this settings ??? or any new Bios will be release by MSI ??????
2. my monitor is 1920x1200 ==> in gaming with GTX 980 SLI, will PCIE 2.0 16X + PCIE 2.0 16X bottleneck it ?? ==> at least in Son of Ryse It will ... http://www.techpowerup.com/reviews/NVIDIA/GTX_980_PCI-E... ==> esp. in 1080p ==> one card as 7 fps different as in PCI 2.0 and 3.0 16X so 2card SLI .. at least 10 fps ???


@@ I try this file https://forums.geforce.com/default/...n3-support-on-x79... previously as 2 x 680 SLI (MSI) in the past 1 year work well in the same computer as PCIE 3.0
my biggest problem is after shifting to 2x 980 sli in the same motherboard ... ==>if set to PCIE 3 at Bios (gtx 680 sli firstly and set in bios as pice 3 on then turn off shift to GTX 980 ==> just dark screen) ==> I cant enter the desktop of windows even not into bios just dark screen and repeated restart ...==>this file is nonsense because i just cant enter windows even BIOS

 

[jedimasterben]

Are you purchasing the GPUs solely to play Ryse? If not, then it doesn't really matter.

 

[Armenius]

As people have said in both your TPU and Guru3D threads, the 3930K only supports PCI-E Gen 2. The PCI-E setting in your BIOS should have an "Auto" setting. Set it to that and you should have no problems. You gain so little from the extra bandwidth of Gen3 with current NVIDIA video cards that it's not worth fussing over

Also:
Before installing your 980s, did you uninstall the drivers for your 680s first? Such an upgrade in GPU warrants a clean driver install. Not only could you run into stability and performance issues if you don't, but Windows could also bitch about it.

 

[billtaco]

thx too much sir ~~~~~~~~

 

[chenw]

Also, doesn't 3930k only support PCI-E 2.0? only the IB-E support PCI-E 3.0

 

[Naieve]

Running my 3930k at pci-e 3.0 with 3 Titans.

There is a force enable .exe, but that didn't work for me. I had to go into regedit to switch things over. Google it, you will find it.