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Overclocking FX-8350 Black Screen and other problems

Recently I decided to delve into the world of overclocking. Before touching the bios I tried overclocking with the AMD Overdrive and I managed to hit 4.4Ghz with a slight increase in voltage (something like 1.37) and get a stable performance at a desired temperature for me.

As I understood overclocking with software was sloppy and usually never better than the bios so I changed all my settings to the defaults and restarted and off to the bios I went.
Here are the changes I made:
I changed the Mhz from 200 to 220 which gave me 4.4Ghz.
I changed the voltages from the default 1.32 various amounts of time all the way to 1.42 but no higher, I also added a little more voltage to the ND part.

Here's the problem: the pc boots fine, but whenever I put it under the heavy load of Prime95 at lower voltages the screen just froze forcing a restart and at higher voltages the screen went black and the mouse stopped working. The temps never went above 56C on the CPU and never above what it usually was on the bridges (checked with Hardware Monitor).

Specs:
Ga-990FXA-UD3 mobo rev 1.0
FX-8350
Sapphire 7970 (not ghz)
G.skill rip jaws 8GB ram
750W psu
14 answers Last reply Best Answer
More about overclocking 8350 black screen problems
  1. Then the overclock is not stable - the cpu got too hot and cut out. Back off the voltage and clocks and try Prime 95 again.
  2. i7Baby said:
    Then the overclock is not stable - the cpu got too hot and cut out. Back off the voltage and clocks and try Prime 95 again.


    But hardware monitor says my temps are under 60, I know it's inaccurate but not off by dozens of degrees. Before I got my hyper 212 cooler I stress tested my CPU untill it got to 80 degrees at one point and it was still kicking.
  3. If you got bsod from running Prime 95 then your overclock failed. The bsod is caused by the cpu cutting out. It cuts out because it gets too hot when running Prime 95.
    Was your monitor running while prime 95 was? What - HWInfo or something else?
  4. i7Baby said:
    If you got bsod from running Prime 95 then your overclock failed. The bsod is caused by the cpu cutting out. It cuts out because it gets too hot when running Prime 95.
    Was your monitor running while prime 95 was? What - HWInfo or something else?


    My monitor was running yes but again I don't understand how the temp literally jumped from some 55C to a bsod temperture?
  5. What monitor were you using? How often does it update the readings?
  6. It could just be unstable without having high temperatures on the monitor. Also, try not raising the voltages and just try to overclock as high as you can. Also, using the multiplier can probably do better than changing the frequency of the cpu.
  7. i7Baby said:
    What monitor were you using? How often does it update the readings?


    Quite an old one AOC LM929 (2007) it refrshes at 75hz I believe.
  8. "But hardware monitor says my temps are under 60" - was Hardware Monitor running at the time?
  9. i7Baby said:
    "But hardware monitor says my temps are under 60" - was Hardware Monitor running at the time?


    Yes obviously, I monitored it all the time and the temp stayed at higher 50's mark before it went black.
  10. Best answer
    Instead of overclocking with the cpu clock, why not change the cpu multiplier instead.
  11. Calnin said:
    Instead of overclocking with the cpu clock, why not change the cpu multiplier instead.


    I'll try that, it just seemed most people use the Mhz so I did that.
  12. Better still, read a guide to overclocking your cpu first - http://youtu.be/MckeAmnDeTk
  13. The way the 8350 boost works is through the multiplier. The fx series has an unlocked multiplier. So you can choose to use the clock or the multiplier. The leave it at 200Mhz, change the multiplier to 22 leave the voltage at 1.35v and see if its stable.
  14. Calnin said:
    Instead of overclocking with the cpu clock, why not change the cpu multiplier instead.


    Thanks I did that runs on a solid 4.5Ghz below 60C :D
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