Can an i5-4690K OC to match a stock 4.0Ghz i7-4790K

boxplayer47 · Jan 28, 2015

I am specing a new build for professional software development (time is money). I noticed that the i7-4790K really doesn't seem to have much headroom, given a stock turbo speed of 4.4Ghz. Would an i5-4690K OC'ed to about 4.2Ghz match it (and save about $100) for performance of compute intensive workloads? I expect the rest of the build to be the same for either CPU, including a better CPU cooler even for the stock speed i7 (for longevity). I need blazing single threaded performance, sometimes 2 or three threads, but will be leaving hyper-threading turned off. Any other suggestions are welcome.

Derza10 · Jan 28, 2015

Well if you are not going to use the hyper threading you would be better off going with the i5, and overclocking it to 4.4 GHz+.

Archgaull · Jan 28, 2015

If you're taking Hyper threading out of the equation, then a 4690K can easily OC to 4.0 GHz. My 4690K is OCed to 4.2 with a Corsair H50. Once I put a H100i, I'll probably try to get 4.5 or higher out of it.

geofelt · Jan 28, 2015

If time is money, I would opt for the 4790K.
The 4790K is a better binned chip that I would expect to be capable of a higher overclock.

If your overclock is conservative, you will not exceed a 1.30 vcore.
For that limit, a simple tower type cooler with a 120 or 140mm fan would be sufficient.

Do not use any ram that exceeds 1.50v. Typically, that is 1866 speed.
Look for lower cas numbers.
The reason is that faster ram will need 1.65v and that takes extra voltage that will reduce your overclock.

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Can an i5-4690K OC to match a stock 4.0Ghz i7-4790K

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