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FX 8350 underclocking at 55c

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  • CPUs
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January 12, 2014 8:27:52 PM

I am having an issue with my cpu. I recently replaced my FX 6300 with this new one, and i ran into an issue with my fx 6300 that would underclock it for some reason, I reinstalled my bios and that fixed my issue with the fx 6300.

I am now having the same issue again with the new 8350, I updated the BIOS and it is still doing it once it hits 55c in prime95. My mobo is the m5a97 LE R2.0 and this board definitely supports this processor. Cool n Quiet is disabled, as is all of the other power saving features in both BIOS and windows. turbo core is disabled as well, but the damn thing keeps underclocking, as far as I understand it the temp threshold on these processors is 62, but its definitely not getting close to that, and i am certainly not overclocked.

Could anyone provide any insight that i may be missing?

EDIT: I do have an aftermarket cooler as well, the CM hyper 212 evo. my idle temp is currently 40c, but thats cause my second floor is warmer than the rest of the house.

More about : 8350 underclocking 55c

January 12, 2014 8:35:44 PM

I have no idea why that's happening. My FX-8350 certainly doesn't do it but I never reach that temperature either. Try getting a cheap CoolerMaster 101 cooler like I have. It works amazingly well.
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January 12, 2014 8:37:46 PM

It shouldn't underclock, unless it's under powered.

What PSU are you using?

What RAM are you using?
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January 12, 2014 8:41:59 PM

Alec Mowat said:
It shouldn't underclock, unless it's under powered.

What PSU are you using?

What RAM are you using?


I am using 8 gb kingston hyperx blu 1333 (two 4gb sticks)

I have the corsair cx600
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January 12, 2014 8:53:14 PM

it's those 8 silver cylinder things right next to the cpu socket on the left of it. In the other pic if you look there's a big blue hunk of metal there.
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January 12, 2014 8:55:41 PM

WhiteSnake91 said:
it's those 8 silver cylinder things right next to the cpu socket on the left of it. In the other pic if you look there's a big blue hunk of metal there.


I see it. Well, why didnt it downclock my 6300? i had that overclocked to the same frequency as the 8350 and it never did that to me, at least it didnt after my BIOS update
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January 12, 2014 9:01:45 PM

searching online I found these posts.

https://teksyndicate.com/forum/cpu/fx-8350-overclocking...

"Asus M5A97 Le R2.0 4+2 powerphase , but no heat spreader on the VRM´s i think you will probably have your ansewr.... you will no reach high numbers without having the risk to burn your board. i would recommend a better board. i think even at stock clock your vrm´s etc will get hot. because there is no cooling on them at all."
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January 12, 2014 9:05:51 PM

Grab heat-sinks for your VRMS...it will only help protect them.
but it's your socket temp throttling it back...
Once the board hits 68 on the socket temp it will down-clock it regardless of your core temp.
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January 12, 2014 9:14:39 PM

WhiteSnake91 said:
searching online I found these posts.

https://teksyndicate.com/forum/cpu/fx-8350-overclocking...

"Asus M5A97 Le R2.0 4+2 powerphase , but no heat spreader on the VRM´s i think you will probably have your ansewr.... you will no reach high numbers without having the risk to burn your board. i would recommend a better board. i think even at stock clock your vrm´s etc will get hot. because there is no cooling on them at all."


I am gonna go ahead and agree with you on this one. I will look into another board then, I had a feeling that was the case, but I wasn't too sure, it only downclocks while running prime95 so i can game no problem. Thanks for the help!
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January 13, 2014 6:02:48 AM

MG Ocelot said:
Alec Mowat said:
It shouldn't underclock, unless it's under powered.

What PSU are you using?

What RAM are you using?


I am using 8 gb kingston hyperx blu 1333 (two 4gb sticks)

I have the corsair cx600


Have you run any actual benchmarks and compared to similar processors online?

What speed is it down clocking too and how are you monitoring it? I know some tests in Prime 95 are RAM intensive and not so much CPU intensive.

I disagree with the other posts regarding that motherboard. It's not cheap, and Asus is one of the best.
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January 13, 2014 7:20:06 AM

Alec Mowat said:
MG Ocelot said:
Alec Mowat said:
It shouldn't underclock, unless it's under powered.

What PSU are you using?

What RAM are you using?


I am using 8 gb kingston hyperx blu 1333 (two 4gb sticks)

I have the corsair cx600


Have you run any actual benchmarks and compared to similar processors online?

What speed is it down clocking too and how are you monitoring it? I know some tests in Prime 95 are RAM intensive and not so much CPU intensive.

I disagree with the other posts regarding that motherboard. It's not cheap, and Asus is one of the best.


I got it to hit 59c before it downclocks it to 1.4 or somethign ike that, then when it gets to 50c it goes back to normal operating clocks. I am monitoring it with ai suite ii which is reading the same info as the bios.

I am running the small fft test which is only testing the cpu and very little ram.
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January 13, 2014 7:27:45 AM

It's definitely the lack of vrm heatsinks causing the throttling.
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January 13, 2014 7:31:58 AM

dacquesta1 said:
It's definitely the lack of vrm heatsinks causing the throttling.


My only remaining question is why did it not do that before on my 6300?
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January 13, 2014 7:37:55 AM

6300 uses less power under load vs 8350. Did you use the same cooler on both CPU's?
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January 13, 2014 8:00:18 AM

dacquesta1 said:
6300 uses less power under load vs 8350. Did you use the same cooler on both CPU's?


I did, cm hyper 212 evo
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January 13, 2014 8:05:50 AM

MG Ocelot said:
Alec Mowat said:
MG Ocelot said:
Alec Mowat said:
It shouldn't underclock, unless it's under powered.

What PSU are you using?

What RAM are you using?


I am using 8 gb kingston hyperx blu 1333 (two 4gb sticks)

I have the corsair cx600


Have you run any actual benchmarks and compared to similar processors online?

What speed is it down clocking too and how are you monitoring it? I know some tests in Prime 95 are RAM intensive and not so much CPU intensive.

I disagree with the other posts regarding that motherboard. It's not cheap, and Asus is one of the best.


I got it to hit 59c before it downclocks it to 1.4 or somethign ike that, then when it gets to 50c it goes back to normal operating clocks. I am monitoring it with ai suite ii which is reading the same info as the bios.

I am running the small fft test which is only testing the cpu and very little ram.



Are you looking at CPU temp?

What are the Vcore temps hitting?
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January 13, 2014 8:11:21 AM

Alec Mowat said:
MG Ocelot said:
Alec Mowat said:
MG Ocelot said:
Alec Mowat said:
It shouldn't underclock, unless it's under powered.

What PSU are you using?

What RAM are you using?


I am using 8 gb kingston hyperx blu 1333 (two 4gb sticks)

I have the corsair cx600


Have you run any actual benchmarks and compared to similar processors online?

What speed is it down clocking too and how are you monitoring it? I know some tests in Prime 95 are RAM intensive and not so much CPU intensive.

I disagree with the other posts regarding that motherboard. It's not cheap, and Asus is one of the best.


I got it to hit 59c before it downclocks it to 1.4 or somethign ike that, then when it gets to 50c it goes back to normal operating clocks. I am monitoring it with ai suite ii which is reading the same info as the bios.

I am running the small fft test which is only testing the cpu and very little ram.



Are you looking at CPU temp?

What are the Vcore temps hitting?


To be honest I am not sure, none of my current programs are showing me that temp. I have HWinfo 64, ai suite ii and HWMonitor.
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January 13, 2014 8:11:34 AM

Try this, if you still have the stock cooler rig/mount the fan from it to the back of your case blowing on the back of the cpu socket, it really helps keep your socket temps down. Then if you have a fan you can put on your side panel, or take your side panel off and use a room fan to blow air across your VRM see if that stops the throttling.
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January 13, 2014 8:36:13 AM

dacquesta1 said:
Try this, if you still have the stock cooler rig/mount the fan from it to the back of your case blowing on the back of the cpu socket, it really helps keep your socket temps down. Then if you have a fan you can put on your side panel, or take your side panel off and use a room fan to blow air across your VRM see if that stops the throttling.


Ok i had a room fan blowing straight into the case, and i had dropped my cpucore voltage earlier to try to manage some of the heat production. So my cpu voltage while under full load from prime95 was 1.244

it made it through 6 tests of small ffts before it got to 59c and once it did, it underclocked it again
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Best solution

January 13, 2014 3:25:59 PM

yeah in short, the 8350 is a very power hungry cpu, you need to make for sure a new motherboard has actual VRM heatsinks, and a good powerphase.
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January 13, 2014 3:47:06 PM

WhiteSnake91 said:
yeah in short, the 8350 is a very power hungry cpu, you need to make for sure a new motherboard has actual VRM heatsinks, and a good powerphase.


It runs very hot as well, at 4.8, I can exceed 65. However; it never downclocks. I'm on an Asus Sabertooth 990FX R2.0.

I guess a new Mobo is the best option here.
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January 14, 2014 10:24:24 AM

WhiteSnake91 said:
yeah in short, the 8350 is a very power hungry cpu, you need to make for sure a new motherboard has actual VRM heatsinks, and a good powerphase.


You were 100 percent right. I cut a hole into the side panel of my case (not a big deal, case is old and I was getting a new one in a few paychecks) right over the VRM, where the heatsink should be, and placed an 80mm fan blowing straight onto it, lo and behold, under 100% load in prime95, i made it to a steady 60c for ten runs and it NEVER downclocked. So thank you very letting me know what the issue was, I am now planning on replacing the motherboard with one that can suit my needs a little better.
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January 14, 2014 10:43:51 AM

that's good it worked :p  ...there have been quite a few people lately with problems with that mobo throttling their cpu
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January 14, 2014 11:37:08 AM

Awesome, I'm glad it worked out. How much are you looking to spend on a board?
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January 14, 2014 2:44:23 PM

dacquesta1 said:
Awesome, I'm glad it worked out. How much are you looking to spend on a board?


not too sure, but i am not gonna spend whati spent on the processor thats for for sure, budget is definitely under 150
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January 14, 2014 6:51:57 PM

you can get some decent boards for that price and under.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

the M5A97 Rev 2.0 would be your most cost effective. From what I've read it overclocks similiar to the M5A99FX Pro 2.0 which has gotten me to 4.6 easy. If you don't plan to overclock there are a few cheaper boards (15-25 dollars less) but has to support 140 watt cpu.
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August 7, 2014 8:02:29 AM

Hey guys. I have the same problem. My FX-8350 starts downclock at 55 degrees celsius while in prime95. I have Gigabyte 990XA UD3. Not sure why this is happening. While playing BF4, my clock never goes under stock clock.
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