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Gigabyte 990FXA UD5-UD7 VRM's?

post #1 of 23
Thread Starter 
So I fried the VRM's on the GA 990FXA UD3. 1.583 volts and 5.2GHz stable but then did a 2nd round of IBT with some modified one and my VRMs fry. I was told the UD3 VRM's weren't meant to handle that kind of power and that the UD5-UD7 had better VRM's as well as better heatsinks (of which I can plainly see.)

I'm sending my Gig back but I'll prob sell it when I get it back (if I get the same board back with the VRMs replaced I probably won't OC it) and go up a notch on the MOBO.

Thoughts?
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post #2 of 23
Are you sure sure that you fried your VRM?

Are you sure sure sure?

'Cause the UD3 has the same VRM as the UD5 as the UD7. They just have a slighty different heatsink that's all.
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post #3 of 23
According to this, your CPU only eats up about 240W of power under full load.

My cheap 4+1 board can handle my 6100 at 4.72Ghz at 1.56V, which is about 196W of power.
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post #4 of 23
Thread Starter 
Quote:
Originally Posted by TheLAWNOOB View Post

Are you sure sure that you fried your VRM?

Are you sure sure sure?

'Cause the UD3 has the same VRM as the UD5 as the UD7. They just have a slighty different heatsink that's all.

Yes...there's burn marks on the VRMs.
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post #5 of 23
Quote:
Originally Posted by TheLAWNOOB View Post

According to this, your CPU only eats up about 240W of power under full load.

My cheap 4+1 board can handle my 6100 at 4.72Ghz at 1.56V, which is about 196W of power.
which probably doesn't compare to an 8-core processor, at 5.2Ghz, at well over 1.5V, running an extremely intensive run of IntelBurnTest AVX. The 990FXA-UD3 is not regularly failure prone, but there are probably few situations in which VRM systems have ever had to push this much.
post #6 of 23
My point is that I use about 200W on a 4+1, and his mobo is theoretically capable of outputting twice the power.
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post #7 of 23
Thread Starter 
Wai. the heataink to the CPU is the vrms? Right? What are the mosfets
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post #8 of 23
Quote:
Originally Posted by SpykeZ View Post

Wai. the heataink to the CPU is the vrms? Right? What are the mosfets

Here you go.
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post #9 of 23
Thread Starter 
Hmm, so I think I'm going to go for the UD5 this time since any extra heat on the VRM heatsink can transfer over to the NB which I can get some better cooling going. Why was that Asrock Fatality discontinued?
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Samsung 850 EVO 250GB EK Predator 240mm Windows 7 x64 Das Keyboard 4 Professional CherryMX Blue 
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post #10 of 23
The Extreme 9 came out. It is pretty much the same though.

Beware, the ASRock's 12+2 is actually just 2 parallel 6+1s, that means even though it will run cooler, it has less overclocking headroom since it cant deliver as much power as a true 12+2 or 8+2.
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