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CPU or VRM makes high pitched noise

post #1 of 16
Thread Starter 
Hello everyone, I'm using AMD FX-8120 (125W) with Gigabyte GA-970A-DS3.
I've been using this CPU on the MB even on the F3 bios version, even though the CPU is not officially supported (only the 95W version, and only from F7a bios).
So here is the problem, I ran OCCT test and after about 10 minutes or so, there is a constant high pitched noise coming from somewhere around CPU area, which lasts for around 30 seconds then stops.
When that happens, I can hear the CPU fan slowing down, and temperatures decreasing which would normally point to throttling (the temps are very low, so it's not that).
After 30 seconds it just comes back to normal, the test is still running and after a few minutes it happens again etc.
However, the CPU usage, frequency, and voltage all stay unchanged (I've checked in OCCT, CPU-Z, and AIDA64 at the same time), and that is a bit confusing since I don't even know what's happening.
Could be some safety instructions from the mobo because of the high TDP processor?

At some point I tried overclocking, and I got to 3,9GHz with the stock voltage, but I can't go any further, even with the voltage bumped to 1.43V, but that's not my primary concern (even though it could be that I got a bad cpu example).
I just mentioned this because the problem could be related, as there could be compatibility issues, but the CPU is working fine, while it shouldn't work at all, considering the mobo manufacturers compatibility list!?

I searched all over the internet, and I haven't found anyone with the same problem as I'm having.
I found that some people are complaining about coil whine, and after searching more on that, I can tell that this is not coil whine, but more of a high pitched "beep" noise (not that loud at all) that is constantly heard for about 30 seconds.
Since I don't want to force the CPU anymore because of potential problems, I can try replicating that sound if it would help?
So, if anyone has an idea what's going on, I would be very thankful for any help.
post #2 of 16
It's your CPU VRM's struggling with the extra load, expect them to go bang soon. No, I'm not kidding.

The reason your CPU is variable in speed is the VRM's can't supply sufficient power and then struggle to keep it stable so it downclocks.

That's my educated guess however.
post #3 of 16
this is dangerous dude. The VRM's probably can't handle it on the cheap motherboard. The 8120 eats power for breakfast and then some. Try to not push your mainboard to the limit until you get a better board.

Sell ur motherboard and get a MSI 990fxa board or another high quality board
    
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post #4 of 16
Thread Starter 
Quote:
Originally Posted by Germanian View Post

this is dangerous dude. The VRM's probably can't handle it on the cheap motherboard. The 8120 eats power for breakfast and then some. Try to not push your mainboard to the limit until you get a better board.

Sell ur motherboard and get a MSI 990fxa board or another high quality board

I would rather go for 970 chipset, since I'm not going to use SLI/CFX.
I'm thinking about Asus M5A97 R2.0, would you recommend it?
post #5 of 16
Coil whine is not necessarily a sign of inadequacy or a prelude to failure.

Also, if the VRM can't supply the current being demanded of it, you don't normally see throttling, you see a crashes/instability or the premature wear/destruction of the VRM.

That being said, the 970A-DS3 has a pretty weak VRM to be overclocking an eight-core Vishera on.
Quote:
Originally Posted by adsubzero View Post

Asus M5A97 R2.0?

I haven't used it personally, but it certainly has a much more robust VRM and better VRM cooling than your current board.
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post #6 of 16
well seeing as how that cheap mobo only has a 4 pin not and 8 pin cpu connector gonna have to agree with the other two. your boards vrm cant take the strain of the cpu's power draw so it makes a sound undervolts/clocks it and tries to keep running.

doing this can damage both cpu and mobo and like comp said your vrms may go boom.


so your plan of action from here you may ask?
get a 990 board because they seem to have better vrm cooling and a beefier vrm layout/design
use that
watch as computer doesnt go boom.
post #7 of 16
Thread Starter 
Quote:
Originally Posted by mk16 View Post

well seeing as how that cheap mobo only has a 4 pin not and 8 pin cpu connector gonna have to agree with the other two. your boards vrm cant take the strain of the cpu's power draw so it makes a sound undervolts/clocks it and tries to keep running.

doing this can damage both cpu and mobo and like comp said your vrms may go boom.


so your plan of action from here you may ask?
get a 990 board because they seem to have better vrm cooling and a beefier vrm layout/design
use that
watch as computer doesnt go boom.

Well yeah, but I heard that Asus M5A97 R2.0 with 4+2 phase has a good protection.
I don't want to spend more money on 990FX/XA chipset, so I'm wondering if this Asus is good in your opinion?
post #8 of 16
Is it really worth saving 10 bucks for a 970-based piece of crap if you can get a real 8+2 phase (990XA-UD3), 990X based decent motherboard for as little as that?

I don't think so.
   
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post #9 of 16
Thread Starter 
Quote:
Originally Posted by Artikbot View Post

Is it really worth saving 10 bucks for a 970-based piece of crap if you can get a real 8+2 phase (990XA-UD3), 990X based decent motherboard for as little as that?

I don't think so.

Well, the prices aren't same everywhere, and in my country, the difference between M5A97 R2.0 and 990XA-UD3 is around $35
Doesn't exactly make up for it, because I'm not going to use more than 1 GPU.
post #10 of 16
If you are able, solder on a new VRM that is better.
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