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Questions about GIGABYTE products => Motherboards with AMD processors => Topic started by: Beachball on December 21, 2013, 10:43:48 pm

Title: 990XA-UD3 No Post
Post by: Beachball on December 21, 2013, 10:43:48 pm

Hello all,
I have a 990XA-UD3 rev3 with an fx-8350 ( Vishera 4ghz ). Initially running 2 sticks of 4gb Corsair 1333 ddr3, and 7970 Radeon HD gfx. All power plugs are where they should be.

Powers up for a second, seems to reset, then powers on continually but no post. Any further attempts at powering on it simply powers up and doesnt post ( no restart ).

Having looked around at other issues with this mobo I then tried switching the cpu for a Phenom II x4 965, no luck. Changing cpu does make it restart - I assume the mobo is doing something here to reset itself to the cpu it detects, but I dunno.

Then tried switching out the gpu for an old Radeon 4870. No luck.

Pulled everything out of the board except the cpu, gpu and memory. No luck.

Tried using just a single stick of RAM. Shifted it around into different slots. No luck.

RAM works just fine on another board, as do both gfx cards and the older cpu ( new cpu I can't test ).

Any ideas ? At this point I am assuming I have fallen foul of this particular boards notorious hinkyness and am thinking of just going elsewhere - I didn't actually realise this mobo was a bit of a problem child until after I had purchased it - my experience with gigabyte mobos in the past has always been no nonsense work first time reliable products.

Title: Re: 990XA-UD3 No Post
Post by: AgentFXA on December 22, 2013, 06:21:45 am

If you have a setting in the bios to unlock cores - disable it and see if it works better! Somehow this setting conflicts with an FX CPU

Title: Re: 990XA-UD3 No Post
Post by: Beachball on December 22, 2013, 10:04:46 am

Tricky as I can't actually get to the BIOS.

I do have another AMD cpu I could try - an Athlon II X4 605e, but I am not sure what difference if any that would make.

I could pick up a cheap single core sempron 145, but I would appreciate any kind of guidance before I even start thinking of possibly throwing good money away after bad.

Title: Re: 990XA-UD3 No Post
Post by: AgentFXA on December 22, 2013, 10:17:18 am

Not really tricky - just hard reset the bios (jumper) and it's done.

Title: Re: 990XA-UD3 No Post
Post by: rinkol on December 26, 2013, 05:21:34 pm

I've seen shorted or miss-wired USB cables. These can prevent booting and even give the impression of a dead motherboard.