Overclocking - CPU instability or something else? A8-7650K

JCLDJB

Commendable
May 24, 2016
153
0
1,760
Hi all,

Another question for the pros...

A8-7650K - clock speed 3.3Ghz - Turbo 3.8Ghz - Overclocked to 4.2Ghz with 1.45v
iGPU at 720Mhz - OC to 960Mhz
Northbridge (Auto - 1800Mhz)
Hyper 212 Evo
Crucial RAM 1600Mhz - OC to 1833Mhz
MSI A68HM-E33 V2 Military Class 4 Motherboard.
PSU - Corsair CX600W
GPU (soon...soon...)
P-state limit - ENABLED
Core C6 - DISABLED
AMD Cool'N'Quiet - DISABLED
AMD Turbo Core - DISABLED when overclocking.

When I set pretty much any overclock, the video clips inside games tend to stutter, FPS microstutters without any noticeable difference to gameplay.
Total War: Warhammer
Ryse: Son of Rome
Might & Magic: Heroes VII
Rome II: Total War
Crysis 3
Wolfenstein: The New Order

MOST show this in the video playbacks.
The Sims 4 - now this is odd. In the game the Day/Night lighting keeps on switching back & forth a few times a second. And, no, this isn't the Disco Add-on version... :)

Any ideas what this may be? Memory issues? CPU Overclocking instability?
Best way (or software) to detect the problem?

I forgot to add - temps no higher than 46C - so 50C max...WELL under overloading the system (depending on voltage chosen, I did use 1.4875 for 4.2Ghz, but realised I could get away with less.)

Appreciate your time!!!

Thanks peeps.
 

JCLDJB

Commendable
May 24, 2016
153
0
1,760
I'm thinking possibly the OC'ing of the iGPU from 720Mhz to 960Mhz
I will try to isolate the issue but if anyone has any ideas in the meanwhile, would save me a lot of time!
Time = Priceless.
OC = AWESOME :D
 

JCLDJB

Commendable
May 24, 2016
153
0
1,760
I thought I had found the problem.
Turns out it wasn't overclocking the iGPU frequency that made a difference.

I turns out that if I save the OC settings (currently at 4.2Ghz with 1.4v) and reboot the PC WITH the overclocked settings, provides complete stability.

Can someone else confirm/deny if this is standard practice with AMD Overdrive?
1.) load PC
2.) overclock to stable settings
3.) reboot PC with overclocked, stable, settings
SUCCESS...?


Feels weird talking to myself, but I hope I'm at the very least providing some useful information for people wanting to overclock.

Now I know that editing everything through the BIOS is the best thing to do, but because my BIOS doesn't allow CPU Multiplier Overclocking (greyed out/cannot change) but AMD Overdrive does, would anyone else agree with, having reset my PC with the OC'ed setting is somewhat similar to a BIOS modification?

Thanks community for your reads & hopefully for some responses...1 would be nice. :)