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990FXA-UD3 (only 3 GPU's working)
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Topic: 990FXA-UD3 (only 3 GPU's working) (Read 199 times)
forato
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990FXA-UD3 (only 3 GPU's working)
October 26, 2017, 02:01:34 PM
#1
Hello guys, I have a lot of 990FXA-UD3 mobo (6 PCI)
But with this REV (1.0):
I cannot make mor than 3 gpus to work...
I have 3 mobos with this REV and already tryed everything... Is there a way to solve this?
With UD3 rev 4.0 all 6 slots works great..
TKS
Suaves
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Re: 990FXA-UD3 (only 3 GPU's working)
October 26, 2017, 02:29:30 PM
#2
Hi friend,
What operating system do you have?
For Linux compatibility on GA-990FXA-UD3 it's necesary to enable IOMMU in the BIOS, also enable EHCI & XHCI "Hand-Off".
Regards.
Lithoss
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Re: 990FXA-UD3 (only 3 GPU's working)
October 26, 2017, 02:48:16 PM
#3
I tried that board and could not get more than 3 working no matter what i did. So i sold it.
I think it's because it is not a UEFI bios.
leonix007
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Re: 990FXA-UD3 (only 3 GPU's working)
October 26, 2017, 03:27:17 PM
#4
It requires shorting of Pins, I haven't tried this yet, so its your own decision to take risk.
details:
https://bitcointalk.org/index.php?topic=36061.80
Quote
gigabyte 990xa-ud3
To get all 5 cards working, the middle x16 slot needs to be shorted. All other slots work without any shorting at all.
If you short out pin A1 and B17 on the x16 slot the motherboard will not power on. You MUST short out pin A1 and B81 - B81 is the second to last pin at the very end of the slot.
adaseb
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Re: 990FXA-UD3 (only 3 GPU's working)
October 26, 2017, 05:23:14 PM
#5
I had the same board and all 6 GPUs worked without any issues.
I didn't need to short anything or change any BIOS settings.
forato
(OP)
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Re: 990FXA-UD3 (only 3 GPU's working)
October 26, 2017, 05:26:08 PM
#6
Quote from: adaseb on October 26, 2017, 05:23:14 PM
I had the same board and all 6 GPUs worked without any issues.
I didn't need to short anything or change any BIOS settings.
Are you sure your mobo is REV 1? Becouse I have a lot of this boards, all REV 4 is full functional, only REV 1.X does not work
forato
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Re: 990FXA-UD3 (only 3 GPU's working)
October 26, 2017, 05:26:40 PM
#7
Quote from: leonix007 on October 26, 2017, 03:27:17 PM
It requires shorting of Pins, I haven't tried this yet, so its your own decision to take risk.
details:
https://bitcointalk.org/index.php?topic=36061.80
Quote
gigabyte 990xa-ud3
To get all 5 cards working, the middle x16 slot needs to be shorted. All other slots work without any shorting at all.
If you short out pin A1 and B17 on the x16 slot the motherboard will not power on. You MUST short out pin A1 and B81 - B81 is the second to last pin at the very end of the slot.
I will try this solution and give you the answer... if works
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