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Two New Sappire Dual-x R9 280X will not register

Tags:
  • Motherboards
  • Sandy Bridge
  • Dual
  • Sapphire
  • Graphics
  • GPUs
  • ASrock
Last response: in Graphics & Displays
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November 21, 2013 3:51:45 AM

Hi,
I'm at my wits end. Hopefully some one can help. I've bought two Sapphire Dual-X R9 280x Graphics cards and my setup doesn't recognize them at all. Here's my current setup:

CPU: i7-2600 3.40GHz
motherboard: ASROCK Extreme4 Gen3
RAM: f3-1280CL9-8GBXL G.Skill RipJaws x 4
HDD: Samsung SSD 840
PSU: Corsair GS700
OS: Window 8.1

The PC boots up fine. No BIOS beeps or warnings, no output from the cards from any of their outputs no matter how many times I try. When I let the PC boot into the OS, there is nothing found in device manager. No unknown device. It just looks as if the cards are not attached.

Fault finding so far:
1. Initially placed the two GPU cards as directed into slots PCIe 2 and 4, attached GPU power (6 pin) and placed crossfire cables on both connections.
2. Placed one GPU cards in PCIe slot 2 only, GPU 6pin power
3. Placed one GPU cards in PCIe slot 2 only, GPU 8pin power
4. Placed one GPU cards in PCIe slot 4 only, GPU 8pin power
5. Placed one GPU cards in PCIe slot 4 only, GPU 6pin power
6. Placed one GPU cards in PCIe slot 5 only, GPU 6pin power (this slot is PCIe X 2 not X3)
7. Placed one GPU cards in PCIe slot 5 only, GPU 8pin power (this slot is PCIe X 2 not X3)
8. Repeat above with other card.
9. Update Bios from 2.30 to 2.31a and repeat above.
10. Down grade Bios to 2.20 and then 2.10 to see if that would work with the above. (can't go any lower due to restrictions on the what the mother board will except)

The GPU cards have a dual mode that can be run in BIOS or UEFI mode i've tried both throughout this process.

After all this I have the same issue. It's as if they don't exist. I know the PCIe slots work as I had a ocz pcie ssd drive that I've had working in all slots at one time or another.

I know that the GPU cards recommend ad least 750watt PSU but I wasn't going to put them under too much load before I could get a replacement. Could this be a factor?

Also I know that the CPU I currently have in the motherboard is a sandy bridge and that the PCI Express bus can only run at x2 speed with this type of CPU. The cards can go at x3 speed but the cards should be able to throttle back surely?

Any advice would be great!

Many thanks.

Rich

More about : sappire dual 280x register

December 3, 2013 8:27:31 PM

Found the answer for anyone is interested.

I was over thinking the issue. It turns out that I wasn't adding enough power to the cards. Simple.

The instructions were not clear. The seemed to suggest that you could use 8 or 6 pin powers when in acual fact, you need 8 AND 6 pin power to each card.

It was a real "D'oh!" moment when I reallised.
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December 12, 2013 9:29:20 PM

Hehe - yeah, I didn't even get that from your initial post and was quite confused that you werre trying 6 and 8 pin connectors, thinking why'd he need two different kinds, when all of mine have one of each :) 
They usually put as many power connectors on a GPU as it needs, no more and no less...

May I ask what drivers did you use to get it to run both cards?
I got 3 different R9 280x GPU's and am not currently able to run more than one at the time, lest it does a BDOS with the 3b error thrown - doing my nut in this problem is...
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