Overclock.net › Forums › AMD › AMD CPUs › AMD FX-8120 + Gigabyte GA-970A-UD3P Overclocking Help
New Posts  All Forums:Forum Nav:

AMD FX-8120 + Gigabyte GA-970A-UD3P Overclocking Help

post #1 of 5
Thread Starter 
I got this duo for my new build.

Phantom 820
AMD FX-8120 (Arctic Cooler + additional thermal paste)
GB - GA-970A-UD3P
16 GB Patriot @ 1866
850W Corsair PSU
Radeon HD 4850 X2

I OC'd the CPU to 3.2 Ghz as anything above that was consistently giving me "Core x critical" with Core Temp readings and it was sitting ambient at around 45-55C

I haven't touched voltages.

Now that I knocked it down - I will sometimes walk away and come back to see "Core X Critical" - everything seems fine when I see it, but the message is unnerving.

I'm supposed to be rocking a 4.0Ghz processor for work, so I planned on OC'ing to get it to that point - but I'm afraid that won't be the case? I've seen so many people do it.

If anyone else has this board/chip please share your settings with me. I've never messed with voltages so that's scary territory for me as well.

Turbo is enabled.

My RAM is OC'd at around 2200 Mhz

What could be causing this? I'm sitting ambient at between 35 C - 45 C when doing light browsing/listening to music.

Are there possibly some settings I'm missing? I haven't touched voltages - my fans all seem to be working properly.

Thanks in advance.
Edited by Somnambulated - 11/28/13 at 10:51pm
post #2 of 5
Which program are you using to read the temeperatures ? For FX-8120 you need to watch the temeperatures of the cores themselves. AMD recommends coretemp and the safe temp is 60 degrees. If you use CPUID Hardware monitor - the temperature is marked as Temperatures Core#0 to Core#7.The temperature marked as CPUTIN is the temperature of the sensor inside the socket - it is safe up to 70 degrees
/ All degrees I mention are Celsius/.
If your core temps are so high on idle it seems :
1) You have used too much Core Voltage for your OC. I got a stable 3.5 Ghz OC with just 1.215V and Stable 4Ghz OC with 1.3V.These volts are different for each CPU as they are not perfect match.
I would recommend you to buy any non-stock MOSFET cooler It won't be a bad idea to put a fan above the mosfet region. If the motherboard has 8+2 or more phases - that will be the best.
Here is a link about the VRMs and MOSFET :

* All CPU energy saving like C1, C6 states, Cool 'n' quiet, Thermal throttling
Enable LLC if possible.

Also reseat your CPU heatsink. Remove any residues on the heatsink and the CPU itself / clean with cotton cloth and some medical alcohol. Put the paste on the heatsink and spread it with some plastic - credit card like / don't use real one/. Then tighten the heatsink using the criss-cross pattern.
post #3 of 5
Thread Starter 
I think I figured out the main issue? I'm not sure though.
I had my RAM OC'd - having knocked that back down to default - it seems that my CPU is more stable. I'm now getting between 16-30C with Photoshop, Media Monkey, Chrome, and Traktor all open.

I don't see LLC in BIOS.
Disabled everything else you mentioned.

My current settings are:

BCLK Clock - 200 Mhz
CPU NB - 2200 Mhz
HT Link - 2400 Mhz All 3 of these are default.

CPU Frequency - 3.84 Ghz

I did not change voltages at all:

CPU Vcore - 1.4125
NB Core - 1.2625

As far as the added fans -
My current CPU cooler is not stock, and from what I read/understand this board is supposed to be great for both 1) Overclocking and 2) Remaining cool without any additional coolers - especially in a case with several 200mm fans - is this wrong of me to think?

Can you recommend a high quality cooler for this cpu? I would rather avoid water cooling as I've never done it and it terrifies me smile.gif

Also - if you have recommendations on a MOSFET cooler that is better than the one on the board, please do recommend one.

Prime95 pushed my core temps to 63C after about 60-90 seconds. Is this pretty average? I immediately killed the test.

Edited by Somnambulated - 11/29/13 at 3:54pm
post #4 of 5
That voltage is quite high. LLC is Load Line Calibration. When the Processor is idle it uses certain Voltage, and when you start loading that voltage drops - and sometimes below the voltage it needs which causes BSOD.
Now just try to lower the voltage step by step - till Windows don't load. Then increase 1 step up till u manage to enter Windows. After that use prime95 and use small FTTs test/ if prime95 gives an error or warning , or the PC freezes - increase the voltage a little bit/.
Warning: If core temperature reaches 58 or above - shut it down. For best, set Coretemp 's Overheat Protection to do that for you. I guess your Arctic cooler is working fine. Are you sure the thermal paste is well spread ? Just try to keep your voltage to minimum - which reduces the heat a lot.
post #5 of 5
Thread Starter 
Thanks for the heads up. Before I -drop- voltage...can I try to raise frequency? I'm seeing a pretty common theme of "I'm OC'ed to 4.0+ at 1.4V

As I originally mentioned, I am ideally supposed to be running at 4.0Ghz.

An extra factor that I may have found - this board came with EasyTune 6 in the driver set - I disabled that from running, as far as I see it's just an overclock utility with limited capability that may be making my BIOS overclock unstable.

As far as the cooler, I found a few threads explaining that FX series runs quite hot - I sprung for a Thermalright Silver Arrow, so we'll see what that does as well.

I did check the print of the thermal paste and it has great coverage. It IS possible that I laid it on a little heavy. I'll be sure to scrape it off some when I put the silver arrow on.

Also, will overclocking RAM without changing timing cause instability?
Edited by Somnambulated - 12/1/13 at 10:49am
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › AMD FX-8120 + Gigabyte GA-970A-UD3P Overclocking Help