Last night I was attempting to increase the overclock on my core i5 4670k which was what I believed to be stable at 4.2 GHz, hoping to get it up to 4.4Ghz or 4.5.
I noticed when running Prime95 that the temperatures would hit 95-100C and the frequency would drop from 4.3Ghz within a few seconds and within a couple minutes settle with the cores near 3.9 - 4.0. Going back to the old 4.2Ghz configuration it behaved about the same.
I set voltage to "adaptive mode" at 1.15V, which the ASRock overclocking app would show go up to about 1.18. Switching to override mode didn't seem to make a difference. I know a lot of OCs on this board are closer to 1.25V but that seemed like a bad idea with things already so hot.
Normally when gaming temperatures are usually ~70C and my PC idles 8-10C above ambient.
Is my cooler inadequate? Is there a way to improve this without buying a new cooler? Or what kind of cooler would be better? It looks like space might be a limiting factor if I go too big.
Cooler: ZALMAN CNPS9500
Case: APEX PCV-588 Black Steel ATX Mid Tower Computer Case (5 fans)
Mobo: ASRock Z87 PRO4
Reapplying thermal compound (MX-4) didn't seem to do very much, maybe dropping idle temps by about 1C but I've been thinking about delidding for fun, regardless.
I noticed when running Prime95 that the temperatures would hit 95-100C and the frequency would drop from 4.3Ghz within a few seconds and within a couple minutes settle with the cores near 3.9 - 4.0. Going back to the old 4.2Ghz configuration it behaved about the same.
I set voltage to "adaptive mode" at 1.15V, which the ASRock overclocking app would show go up to about 1.18. Switching to override mode didn't seem to make a difference. I know a lot of OCs on this board are closer to 1.25V but that seemed like a bad idea with things already so hot.
Normally when gaming temperatures are usually ~70C and my PC idles 8-10C above ambient.
Is my cooler inadequate? Is there a way to improve this without buying a new cooler? Or what kind of cooler would be better? It looks like space might be a limiting factor if I go too big.
Cooler: ZALMAN CNPS9500
Case: APEX PCV-588 Black Steel ATX Mid Tower Computer Case (5 fans)
Mobo: ASRock Z87 PRO4
Reapplying thermal compound (MX-4) didn't seem to do very much, maybe dropping idle temps by about 1C but I've been thinking about delidding for fun, regardless.