GA-990XA-UD3 fails to power on

ChrisD.

ChrisD.

ChrisD.

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Joined
20 Sep 2006
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36,485
Built up a new rig and only had one GPU connected, board works fine. Has been fine all afternoon. Got Windows installed, put in the second GPU and now it won't power on.

The only way I can get it to power on is to remove the second GPU and then reset the BIOS. I've tried both GPUs independently. All kit is new today.

Any ideas?
 
Seasonic 860w '80 Plus Platinum' Modular Power Supply
Gigabyte 990XA-UD3 AMD 990X (Socket AM3+) DDR3 Motherboard
AMD Bulldozer FX-4 Quad Core 4130 Black Edition 3.80GHz
Corsair Value 4GB (2x2GB) DDR3 PC3-10666C9 1333MHz Low Voltage Dual-Channel Kit
Kingston 30GB SSDNow S200 Drive SATA 6Gb/s 3 2.5" (9.5mm height)
2x Powercooler R9 280X
 
are you using the latest bios? sure that board supports xfire? and the speeds of the second pcie slot fast enough ect
 
The BIOS version shows as 'FB', it is not listed on their site? Trying to update it now to the latest non beta.

I don't want Crossfire, but the board does support it. I haven't looked at any speeds for the second slot, I'd at least expect the power to come on regardless?
 
Could it be the cables? There's a number of PCIE cables, only two of them go onto the 'PCIE' labelled row on the PSU, the other 4 only fit into the 'IDE' ports, I just tried one card off the IDE ports and it wouldn't work, put them in the PCIE ports and it boots
 
MilanoChris said:
Could it be the cables? There's a number of PCIE cables, only two of them go onto the 'PCIE' labelled row on the PSU, the other 4 only fit into the 'IDE' ports, I just tried one card off the IDE ports and it wouldn't work, put them in the PCIE ports and it boots
Click to expand...

Im not understand the IDE ports that you refer to? Does it boot with one graphics card?
 
GIGABYTE FAE said:
Im not understand the IDE ports that you refer to? Does it boot with one graphics card?
Click to expand...

Modular PSU probably with SATA/IDE and PCIe, etc. ports on the PSU itself - all GPUs should be plugged into cables connected to the PCIe ports and not the IDE ones.

EDIT: Facepalm its the same PSU as I have (I skipped over the spec list) - yes you need all GPUs connected to the PCIe ports or they will not work infact the PSU shouldn't even start up to POST the board if you connect a GPU to the SATA/IDE ports.

EDIT: Exception to the above if your using 4 pin molex to PCIe convertor cables.
 
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Sorry, I will try and explain a little better.

I have 2 cables which will fit into the PCIE ports on the PSU. The other ends go into the GPU.

I then have 4 other cables, on one end it is labelled PCIE and has two 6+2 pin connectors and the other is labelled PSU. But, the PSU end will only fit in the IDE/peripherals row on the PSU.

Hope that's clearer?

This is the PSU:

nt8_575px.jpg


And this is the cable that is labelled PSU at one end and PCIE at the other. It will only go into the upper row on the PSU. The end with PICE on has two separate +2 plugs on it.

PqTvaXA.jpg


(sorry for the poor pic)

There are only two cables that will go direct from the PCIE row on the PSU to the GPU, and both are on GPU1 right now with it all working.
 
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Hmm thought all the PCIe cables that came with mine only went into the wider PCIe ports but I can't actually remember 100%.
 
Hmm the orientation on the back of mine is different to the picture above and they are all 4 pin wide for the PCI-e row (and 4 pin wide molded block on the PCI-e cable PSU end without 1x2 being detachable).
 
Well I've just used two molex cables, each with a 2x molex to PCIE 6 pin adaptor (one then on to a 8 pin) and it powers on. I think I've been supplied the wrong cables with the PSU?
 
Got me wondering now as mine has the same layout on the back as the 760watt, rather than the layout on the 860watt images, but its definitely badged as 860watt :S

EDIT: Ah the new models 760/860 have same design just slightly different internals the older model has different design between 860 and 760. Had me worried for a moment there heh. If your PCI-e slots are 6 pins wide then ignore whatever I said as it only applies to the model I have.
 
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Well I'm pretty miffed that a PSU brand such as Seasonic (one of the best in the business) have supplied cables which are inadequate to run more than one GPU (and actually worthless).
 
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