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AMD FX 8320 Black edition overclocking - Page 4

post #31 of 33
Quote:
Originally Posted by Undervolter View Post

Most probably his VRM get red hot at 4.5 and he gets VRM throttling, thus the CPU is at 1400Mhz half of the time and he sees abnormally low temperature.

This is a very good point and could explain the situation. You should check the temperature of the VRM heat sink. It should be hot, but not too hot to touch. I would monitor it from the time you begin testing to the time it starts to warm up. You can also monitor CPU-Z. It should actively show you what your CPU is clocked at during testing so you can see if it throttles.

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Jarvis
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Generic DVD-RW 2 x Noctua (NF-P12-1300 )1300rpm Premium Silent... Monsoon 90° Rotary Angle Fitting - 5/8" - Red Bitspower Dual / Single D5 Top Upgrade Kit 100 ... 
CoolingCoolingCoolingCooling
ModMyToys DreamFlex Premium 3/8" ID Tubing Reta... Coolance Liquid Coolant Bottle, 700mL Fluoresce... Coolance PMP 450 Variable Speed D5 Pump Bitspower D5 Mod Top V2 Pom version 
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Alphacool NexXxos UT60 Full Copper Radiator 240 Noctua NF-A6X25 FLX Quiet Computer Cooling Fan ... NZXT Sentry Mesh Fan Controller w/ Five 30 watt... 2 x Corsair Air Series SP120  
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FX-4300 Gigabyte GA-78LMT-USB3 EVGA Geforce GTX 260 G.Skill Ripjaws X 
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post #32 of 33
Thread Starter 
Ok. I'll do that. But I know my previous info won't be accurate. I was looking at CPU temp in bios. So I guess it wouldn't be under load at that point. I clocked it back to 4.2 and I'm going to run prime again.
post #33 of 33
I've just finished to build my rig, and clock it like I wanted it to be for now, and maybe I could help you.

I am currently on stock cooling, waiting for my watercooling parts to come in/buy the missing ones (hey, not my fault I live in Canada), so I already knew what kind of clocks I was gonna go for. Without touching any of the cpu's setting in the bios, I simply entered the FX 8350's clocks and voltage (4Ghz with Turbo at 4.2 @ 1.32V), but I quickly notice that temperatures would hit 65-66 which was too high for me (62.5 is the max if I'm correct).

Just for the sake of it, I ventured in the undervolting world. I found the best setting for Load V Calibration, then lowered my volts as low as I could.
As surprising as it sound, my chip runs 4.0Ghz, even operating at 4.2 more then I though it would at only 1.188V! (We are far from the 1.32V stock)

Seeing that you do not have a 990fx chipset, that's what I would try for you now. Get some basic clocks, find your lowest stable voltage and go up from there, until you hit a temperature ceiling, but also keep an eye on those VRM's. I am guessing that your board has a 4+1 design, and you don't want your board to catch on fire now, would you ? tongue.gif

Hope this could help you out, have a nice one mate ! thumb.gif
Edited by brenzor - 10/31/15 at 4:27pm
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