Artifacting when overclocking CPU? Please help

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willsfrantz

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Feb 2, 2016
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I recently built a new machine:

Core i7 6700K
Sapphire R9 390 NITRO
Asus Maximuss VIII Ranger Z170
32GB G.Skill DDR4 @ 2400
2xSSDs + 2xHDDs
750 Watt Thermaltake Tough Power

Very odd issue I'm having is when I attempt to very slightly OC' the CPU - When going from default 4.2Ghz (turbo) to something like 4.4 or 4.5 Ghz , the system will reboot and POST fine. But windows (especially chrome and web browsers are getting crazy weird artifacts on the screen).

This is something I would expect to see when I'm overclocking my GPU, but not my CPU. I've been very careful to increment my CPU voltage as I OC the multiplier... but still the issue seems to happen. My only hypothesis is that I'm starving the GPU for power? But this seems rare, as when I game / perform bench marks without any OC's - there are no issues.

Any help would be GREATLY appreciated.

 
Solution
mp5mafia
Yeah that's weird. The only time I would see artifacts is when I go too high with the vram overclock and/or overheat it. the only other thing I could think of would be lack of power to the gpu. Maybe worth re-connecting all thepower cables?
Also did you try re-installing drivers?
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mp5mafia

mp5mafia

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Apr 1, 2015
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Lol @meself I got confused ignore my last reply haha was thinking about something else lol

Either way I would check all temperatures especially in your case and gpu. Since you oc your cpu extra heat might cause vram to overheat and artifacts
 
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willsfrantz

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Feb 2, 2016
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Thanks for the quick response , should have mentioned above...after overclock, I've been monitoring temps -CPU idles high 20s... maxes out high 60s, occasionally reaching 70 when under 100% load. GPU is in the 30s, higher with load... none of these numbers seem abnormal to me.
 
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mp5mafia

mp5mafia

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Apr 1, 2015
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4,860
Yeah that's weird. The only time I would see artifacts is when I go too high with the vram overclock and/or overheat it. the only other thing I could think of would be lack of power to the gpu. Maybe worth re-connecting all thepower cables?
Also did you try re-installing drivers?
 
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willsfrantz

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Feb 2, 2016
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Again, thanks for tips.. Have not yet tried reconnecting all power cables. Probably one of my next steps. The only other possibility here that comes to mind is my 750 watt PSU is a few years older, and only had 1x8pin GPU power connector, the other 3 were 6. As a result, I bought a 6 to 8 pin adapter.

Before jumping on that as the 'culprit' though - I'd like to point out, I've been doing mild gaming, (Crysis 3, Starcraft 2) at stock settings - when I'd expect the GPU to be using load, and have no had any issues during gaming sessions.
 
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