Well, I am in a very bizarre situation currently. Last week, I purchased a sabertooth z77 motherboard to hope to fix my sitaution
About 3 years ago, I built a brand new computer. Initially I purchased an asrock lga 1155 motherboard and a nvidia gtx 550 ti video card. I had nothing but trouble trying to get the motherboard to read the GPU. I got an RMA done and while that was off for the RMA i bought a gigabyte mobo and a new card and ran into the same problem.
Eventually I worked around the Asrock board and managed to get the GPU to work correctly. A few weeks ago I upgraded my GPU to a EVGA 780 SC and upgraded my PSU to a 850 w. As soon as I received and installed my components I ran into the same problem. My ASrock motherboard had 3 PCIe slots and none but the very last PCIe slot worked. Meaning, I ran the GPU at 4x speed in the very bottom slot. Frustrated with ASrock I decided to purchase my first Asus board hoping things would work out better. I ended up having the same issue.
I updated the BIOS to it's current version and all the drivers as well. I even purchased a new hard drive and did a fresh windows 7 installation as well, to avoid any driver conflicting issues. Now, I know that the evga 780 GPU is not at fault here because it works flawlessly on my old motherboard but my asus sabertooth z77 will not read the GPU at all unless it is in the very bottom (black) PCIe slot.
But there kicker here is, I have a few other GPU's to use as a way of troubleshooting the motherboard. The sabertooth will infact read the older GPU's in any of the slots but it will not read the evga 780 GPU unless it is in the very bottom slot. So I know the PCIe slots are not defective, I know the GPU(s) are not defective but I have no idea what I need to do or can do to fix this problem
I have disabled onboard video, cleared cmos, flashed and updated bios, tried with different RAM connected, refitted the CPU and disabled eSata controllers (that way the CPU is not sharing PCIe lanes with eSata drives).
But it does this on all three motherboards I have right now. Gigabyte z68, asrock z68 gen 3, and now my asus sabertooth z77. I have no clue what is wrong here or what to do now
also, I have an intel i7 2600k (sandy bridge) CPU
About 3 years ago, I built a brand new computer. Initially I purchased an asrock lga 1155 motherboard and a nvidia gtx 550 ti video card. I had nothing but trouble trying to get the motherboard to read the GPU. I got an RMA done and while that was off for the RMA i bought a gigabyte mobo and a new card and ran into the same problem.
Eventually I worked around the Asrock board and managed to get the GPU to work correctly. A few weeks ago I upgraded my GPU to a EVGA 780 SC and upgraded my PSU to a 850 w. As soon as I received and installed my components I ran into the same problem. My ASrock motherboard had 3 PCIe slots and none but the very last PCIe slot worked. Meaning, I ran the GPU at 4x speed in the very bottom slot. Frustrated with ASrock I decided to purchase my first Asus board hoping things would work out better. I ended up having the same issue.
I updated the BIOS to it's current version and all the drivers as well. I even purchased a new hard drive and did a fresh windows 7 installation as well, to avoid any driver conflicting issues. Now, I know that the evga 780 GPU is not at fault here because it works flawlessly on my old motherboard but my asus sabertooth z77 will not read the GPU at all unless it is in the very bottom (black) PCIe slot.
But there kicker here is, I have a few other GPU's to use as a way of troubleshooting the motherboard. The sabertooth will infact read the older GPU's in any of the slots but it will not read the evga 780 GPU unless it is in the very bottom slot. So I know the PCIe slots are not defective, I know the GPU(s) are not defective but I have no idea what I need to do or can do to fix this problem
I have disabled onboard video, cleared cmos, flashed and updated bios, tried with different RAM connected, refitted the CPU and disabled eSata controllers (that way the CPU is not sharing PCIe lanes with eSata drives).
But it does this on all three motherboards I have right now. Gigabyte z68, asrock z68 gen 3, and now my asus sabertooth z77. I have no clue what is wrong here or what to do now
also, I have an intel i7 2600k (sandy bridge) CPU
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