ASUS M4A89GTD PRO/USB3 and FX 8320 (voltage drop)

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Almin94

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Jul 10, 2012
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Hi,

I have ASUS M4A89GTD PRO/USB3 and I bought new cpu - AMD FX 8320.

Now I have problem with stability of cpu frequency and voltage. When I run Prime95/IBT cpu voltage and freq drops down to 1.2V and 2.9GHz. All power saving options in Bios was disabled. What's the problem?

This motherboard should be enough for this cpu and give to it enough voltage. When I set cpu to 2.5GHz the problem is gone and frequency stay stable at 2.5GHz. While I had Phenom II X4 955BE I testi it on 1.55V and frequency and voltage are ultra stable - no Vdrop and anything else.
As such, he used a lot more energy then the current processor FX 8320.
 
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cin19

cin19

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Mar 14, 2011
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I think the problem is from the BIOS update, I check the cpu supported list and the bios version. I found the newer bios ( V3029 ) came out on 7/27/12, but the fx8320 came out on 10/23/12. So the cpu ( fx8320) is not on the list, yes the MB can power the cpu but the problem the cpu is not in the list, so all you can do 1) update the bios first and try. 2) also try to increase the cpu frequency up to the whatever number that you can run the PC stable. 3) buy the new MB like the M5A97 R2.0.
 
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Almin94

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Jul 10, 2012
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10,630


Same thing with 3030 beta bios and 2029 version.
Btw, MB set CPU/NB voltage to 1.58V, maybe wrong readings? Otherwise, that is too high...
 
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Calvin7

Titan
Feb 19, 2013
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The motherboard offered Beta support in 2011 for AM3+ Zambezi CPUs. The Zambezi would work but many features such as overclocking were absent. The FX 8320 is not a Zambezi, it is a Vishera processor core. The FX-8320 is not on the CPU Support List so there is no reason to think it would work correctly if it worked at all. It doesn't make much sense to experiment with CPUs not on the official CPU Support List.
 
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Stpalligrl

Stpalligrl

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Feb 9, 2015
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Could be the power supply starting to die. I had the same problem and once I installed a new power supply everything
was working correctly....gotta be at least a 500 watt.
 
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