Solved

Overclocking AMD Phenom 970 creates stuttering in games

Hi guys,

I've recently decided to try to overclock my CPU to try and get a reasonable FPS on AC Unity.

Here are my specs:
MSI 290x
AMD Phenom 970 Black Edition
8G RAM
Coolmaster Watercooler
600 ~Watt PSU

I've been reading up a lot online about how best to overclock a BE phenom (several sources say just shift the multiplier up is the best way - so that's what I did).

I went through the process of increasing the multiplier up and testing. Without raising the voltage I could have a stable state at 19.5.

However I noticed that at any level above 18.5 the overclock creates a regular stutter in games which is worse than the low FPS.

I've tried increasing the voltage on the CPU but that hasn't removed the stutter. When looking around online I found a few threads saying stuttering could be caused by throttling the CPU when overclocking, but they didn't give much detail on what to do about it.

So my question is does anyone know what could be causing this? And how to fix?

I think the answer could be in the fact my CPU is such a bottleneck. Is there any way to overclock differently to account for my CPU bottlenecking my 290x?

~Thanks for any help!
10 answers Last reply Best Answer
More about overclocking amd phenom 970 creates stuttering games
  1. Best answer
    You can reduce the OC in order to reduce the throttling if this is actually what happens.

    Also, what is the exact model of your PSU. The R9 290x is a power hungry card, so if your PSU is not a quality one, the OC on the CPU might cause the PSU not to be able to provide the power that is requested by the CPU + GPU.
  2. what temperatures does it reach? when it stutters? check with coretemp for example
    edit: if it overheats you need a better cooler or better thermal paste/application, if not it could be also the psu causing this, it's a bit close to the power needed so if it's a low quality psu it could be the one causing instability when the cpu needs more power. (as in when oc'ed)

    what's the exact psu model?
  3. i would say high temps or cool'n'quiet setting is on. Its stuttering because its getting too hot and throttling. If its not one of those, it could also be errors due to not enough vcore voltage with the overclock
  4. Thanks for the quick feedback. I've installed a program to look at CPU temps and its running at 60 degrees - is this too hot?
  5. Also the cooler I have is Cooler Master Seidon 120V and the PSU is actually a 650W cosair (model CMPSU-650XT)
  6. Julius484848 said:
    Thanks for the quick feedback. I've installed a program to look at CPU temps and its running at 60 degrees - is this too hot?


    at idle 60 is very bad, if that's what it reaches while gaming it's fair.
  7. Sorry should have been more specific. 60 degrees while gaming, 42 degrees while idle. Does idle seem high?
  8. that's okeish temperatures, the next thing to test would be the psu, you have another better psu to test with? or a weaker graphics card? (to see if using that one and oc-ing increase performance instead of decreasing it?)

    what i assume happens is that the extra wattage makes the voltages a bit unstable and causes the graphics card to drop speed thus decreasing the fps.
  9. Idle does soom just a bit high, but it also depends on your ambient temperature.

    If you have an older build, probably re-applying the thermal paste and cleaning the CPU heatsink might improve your temps.
  10. laviniuc said:
    that's okeish temperatures, the next thing to test would be the psu, you have another better psu to test with? or a weaker graphics card? (to see if using that one and oc-ing increase performance instead of decreasing it?)

    what i assume happens is that the extra wattage makes the voltages a bit unstable and causes the graphics card to drop speed thus decreasing the fps.

    unstable voltage wont cause the gpu to drop speed. more likely a temperature thing. Monitor your gpu temps. and check for throttling (clock speed drops over time).
    Are you overclocking in BIOS? if overclocking with software then that is a problem.
Ask a new question

Read More

Overclocking CPUs AMD Games Phenom