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

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-Express_Scaling/15.html ==> 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
7 answers Last reply Best Answer
More about gigabyte gtx 980 sli work pcie gtx msi x79 gd45
  1. any one help please
    the problem really bother me so much
  2. i wish i could find the article ananandtech but you will have no bottleneck at your resolution.
  3. try and do some searches. i am almost certain it was anandtech who did a complete and beautiful article on pcie scaling. you have nothing to worry about. at worse 5% performance decrease and at your resolution you would never know.
  4. fkr said:
    i wish i could find the article ananandtech but you will have no bottleneck at your resolution.

    Thank you too much ... really
    but ==> Son of Ryse It will ... http://www.techpowerup.com/reviews/NVIDIA/GTX_980_PCI-E...
    just single card will make 7 fps difference
    of course even in 2 way SLI in 1920x 1200 ==> with SS 2x2 the fps just 55~60 some area down to 50 with GPU 99% + 98%
    if in PCIE 3.0 will the fps getting higher may be just 5 fps .. but smoother
    finally of course most of the games have only little difference in fps ...
  5. Best answer
    you are talking about 2-3 fps if you are running at 100fps. this is 2-3%

    it is nothing that you il ever see at 1920x1080. your setup is perfect
  6. fkr said:
    you are talking about 2-3 fps if you are running at 100fps. this is 2-3%

    it is nothing that you il ever see at 1920x1080. your setup is perfect

    thank you too much sir
    I have learned so much...
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