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FX-8320 Advice

post #1 of 3
Thread Starter 
Hello everyone. I am looking for a bit of advice for my 8320. So far I have loved this chip, especially for the value. I am running this on an 990FXA-UD7 motherboard. I have had quite a few problems with overclocking this chip, but it appears to be mostly with the motherboard. However, I want a second opinion for this issue.

I am trying to really push this chip. I had it set to 4.0GHz with no problem, running at around 1.35V. Temps were great, and everything was fine. But I want more. I have so far been able to push this chip to 4.4GHz, at 1.44V (motherboard's vdroop is terrible, and drops the voltage to 1.42V under load). It appears to be stable, but there are some minor problems. Despite not pushing voltages too high, I am getting a slight high-pitched noise from my motherboard. It sounds like it is coming from the VRM, but I know that they can handle a lot more. I have seen someone with a UD3 mobo run stable at 1.55V (just trying to push as much as he could from his chip, but didn't keep it at that). His did not have any noise whatsoever. The voltage in my BIOS is set at +.05V, which matches pretty well with what I am seeing in HWiNFO.

I am also getting some interesting thermal issues. I have a Kraken x60 cooler that I am using on it. Running at 4.0GHz, I was getting right at 45C core under load. However, running just a tiny bit more voltage and slightly higher frequency, I am topping out at 65C. It is averaging 55C, but it jumps sporadically. Usually it is just for a few seconds, but it is still concerning. It is probably related to the vdroop, but I cannot verify. There doesn't appear to be a jump in voltage in HWiNFO, but it doesn't appear to update as frequently as the temps.

I am going to try and get a little bit of a lower voltage for this overclock, to hopefully solve the problems that I am seeing. Does anyone have any other suggestions? It just seems really odd that the temps are this much different on water, and that the motherboard is making that noise.
post #2 of 3
Since you doing watercooling I strongly suggest you actively cool the VRM by putting fans on top of it, also it's recommended to put fans on the back of the motherboard as well where the VRM and CPU is at.
NZXT Phantom 240
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NZXT Phantom 240
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 4670k AsRock Z87 Extreme4 Intel HD 2x8GB Kingston ValueRAM DDR3-1600 @ 1866MHz 
Hard DriveHard DriveHard DriveCooling
Samsung EVO 840 120GB 2TB Seagate Barracuda ST2000DM001 2TB Seagate Surveillance ST2000VX003 CoolerMaster Seidon 240M 
OSMonitorKeyboardPower
Windows 10 Professional x64 23" LG Flatron W2343T CM Storm QuickFire Pro Cherry MX Black keys Cosrsair CX750M 
CaseMouseMouse PadAudio
NZXT Phantom 240 Logitech G400 gaming mouse Razer Goliathus Omega Speed Edition Creative X-Fi Titanium HD (2xLME49720HA + 2xLME... 
Other
Rotel RA-820 amplifier + Mission 760i SE booksh... 
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by nX3NTY View Post

Since you doing watercooling I strongly suggest you actively cool the VRM by putting fans on top of it, also it's recommended to put fans on the back of the motherboard as well where the VRM and CPU is at.

I don't have a fan behind the motherboard, but I have a 240mm on the side of the case as intake, and a 140mm directly beside the VRMs as exhaust. I try to keep airflow pretty good, knowing I am running on water. I thought this was enough to cool the VRMs enough, considering the beefy northbridge heatsink (main reason I went with this board), but it appears I was wrong. Northbridge was averaging 55C under full load, and was topping out at 60C. Going to go through and redo my case for better airflow. I will try and rig something up for the VRMs.

I have dropped the voltage down to 1.404V and appears to be stable at 4.4. Also stops the noise. Going to go with this for now.
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