Can't get past 4.7Ghz with a 4790K

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baggsy

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May 15, 2013
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Hello,
I am in the process of over clocking my 4790k and at 1.25v I can hit 4.7Ghz (stable for 3 hours on OCCT).
I have tried to get 4.8Ghz and ramping the V core up to 1.27 but this just causes instabilities.
Is it normal to get 4.7Ghz at what I presume to be such low V core? Whilst struggling to get 4.8Ghz without going outside my comfort zone?
 
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H
1.25 isnt a low vcore mate. for the speed your getting though it is fairly decent.
any more than 4.7 and i would recommend switching to water cooling if you haven't already. as it copes with temp changes much better than air does at that speed.
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sportsfanboy

sportsfanboy

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Mar 16, 2008
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whats your input voltage set to? Cache speed and voltage, ram speed also? system agent voltage can help also depending on the setting. some of these chips seem to hit a wall around 4.6-4-7, but you seem to have voltage and temperature headroom, so 4.8-4.9 isn't out of the question.
 
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James0987

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Jan 17, 2015
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To answer you questions, yes, it is normal. I run mine at 4.7 with 1.24V. The only way i can get 4.8 stable is to ramp it up to 1.3V, which im not confortable with. It might only take a .025 increase in Vcore to get a chip from 4.6 to 4.7, then take .05 more to push it up to 4.8.

You have to be a bit lucky to get a chip that can run 4.8 under 1.3 Vcore.
 
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