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[R4BE] Top PCIE slot not working with GPU

larsiano
Level 8
Ive tested two different PCI-e 3.0 cards on my replacement R4BE mobo. Both cards work in other slots except the top slot. In the top slot the system will not boot and the VGA led on the motherboard is active. I have checked the PCI-e switches on the motherboard and all are turned on. As i tought the top slot would function just like any other slot this is very strange? Tested with no overclock (only memory @ XMP speed normaly) at all to no avail. If i put my PCI-e SSD Drive in this slot it does work funny enough?

Specs:
MoBo: Asus R4BE (BIOS 0801)
RAM: 2400MHZ quad kit G.Skill RipjawsZ 16GB
CPU: 4960X Intel + Corsair H100i
OS: Win 7 UK x64 Ultimate
GPU: Asus GTX980 Strix (also tested with 780GTX OC Asus)
HDD: OCZ RevoDrive 3 X2 240GB PCI-e
PSU: Corsair AX1200i Digital Platinum
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2 REPLIES 2

larsiano
Level 8
maybe i should add:
-there is no damage to the top PCIE slot
-It has never worked in this slot
-tested with different memory, psu and gpu's
-removed the mobo from the case


Note: also i am a professional technical support rep. and have troubleshooted a lot of hardware in my time. The only question i have here seeing the complexity of the R4BE if there is anything else that could solve this problem without having to RMA the board again?

jaggerwild
Level 7
Sense your a PROFESSIONAL Technician you have also tested a different GPU?
Asus X79 DELUXE
3930K WATER
2X Intel 520 Raid o
2X GTX 780ti DCII OC WATER
16 GB G skill 2133
Corsiar AX1200
Acer 24" 1080
Swiftech MCP655 Vari
HWlabs 3/120
Asus DVD

BLIND BIOS FLASH LINK http://rog.asus.com/forum/showthread.php?12749-RIVE-BIOS-FlashBack