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CPU Throttling for No reason

post #1 of 7
Thread Starter 
Hello,
Since Purchasing a new Cooler (Cooler Master Nepton 240M) my CPU has out of the blue started throttling for no apparent reason.

Under gaming load the CPU stays below 50 degrees, so I assume it's not thermal throttling. I have tried turning off thermal throttling to no avail and reset my Motherboard, which also did not help. I also check my power settings which were on high performance.

I'm currently very confused as the CPU was running stable @4.2Ghz for ages on my old water cooler, An AlphaCool Eisberg 240mm (which leaked), and now on factory clock it throttles, for no good reason.

Specs:
CPU: AMD FX- 8320 (3.5GHz)
GPU: Gigabyte G1 Gaming GTX 960
Motherboard: AsRock 970 Pro 3
PSU: Evga 650W G1 Gold
HDD: 1TB
SSD: 120GB
Cooler: Cooler Master Nepton 240M
OS: Windows 10 64bit

Thank you in advance for any help,
Regards,
Matti
post #2 of 7
The first things I would do, is check to make sure that:

A) check to make sure there is enough tim under the block
B) check and remount the block to the cpu
C) it sounds dumb, but, make sure the fans are spinning lol. (I've mistakenly forgotten to plug mine in on a couple of occasions, that's why I mention it)
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Deepthought
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Baldr
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Terminal Dogma
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CPUMotherboardGraphicsRAM
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Samsung 850 EVO  Prolimatech Genesis Black 2x Phanteks PH-F140HP 3x Noctua NF-P14S 
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Debian 8 Samsung UN55H6350AFXZA Dell Generic Nanoxia Deep Silence 5 
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post #3 of 7
The reason is rather obvious. Your motherboard. You should be thankful to run that CPU at 4Ghz on that motherboard, let alone 4.2Ghz. The watercooler, is worse for the air circulation at the VRM area,so now, most likely you have VRM throttling. Why now and not before? Because apparently for some reason, now your air circulation is worse or the content of your PC became hotter.

So, the bad news:

Asrock in the official CPU list, doesn't support your CPU on that motherboard, Plus, even for 95W CPUs, it says:

* For cooling the CPU and its surrounding components, please install a CPU cooler with a top-down blowing design.

http://www.asrock.com/mb/AMD/970%20Pro3/?cat=CPU


Also make sure you have APM disabled of course. But other than that, your options are limited between addings fan to VRM and undervolting.

EDIT: Another possibility, is that your VRM throttling, happened now, because one of your mosfets burnt (you should do a visual inspection for scorched marks). We 've seen this before, with motheboard losing its overclockability after 1 mosfet failure, while the rest work.
Edited by Undervolter - 6/19/16 at 7:44am
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Main
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Dedicated Encoder
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CPUMotherboardGraphicsRAM
FX-8320@4Ghz Gigabyte 970 UD3P rev2.1 Gainward GTX 750Ti Corsair XMS3 1600Mhz 16GB (4x4GB) 
Hard DriveHard DriveOptical DriveOptical Drive
Crucial BX100 250GB Western Digital Green 2TB LiteOn Blu-Ray Burner IHBS 112-2 LG BH16NS55 Blu-Ray Burner 
CoolingOSMonitorKeyboard
Scythe Katana 3 Windows 7 Pro 64bit ASUS 22" VS228HR Microsoft Wired Keyboard 600 
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post #4 of 7
Thread Starter 
This woud make sense but I had another water cooler installed (Alphacool Eisberg 240mm) before this.
post #5 of 7
Thread Starter 
what do you mean by tim?
post #6 of 7
Quote:
Originally Posted by Matti10 View Post

what do you mean by tim?


Thermal Interface Material.
post #7 of 7
Thread Starter 
is there a way you can check your vrm temps?
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