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Safe Voltage for my new 4790K?

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SuperDave1685

Member
Joined
Jul 22, 2002
Location
USMC.. OoRah!!
I've googled and read several different forums, including this one, and I've seen answers all over the place. Generally, people say don't go over 1.3-1.35v for continuous use. I'm not sure if this is just because they're using air cooling or not.

I have a custom loop using a XSPC RayStorm Block, a XSPC RX240 Dual 120mm Radiator, and a XSPC EX240 Dual 120mm Low Profile Split Fin Radiator powered by as Swiftech MCP655-B Pump.

I did a quick, dirty OC session and hit 4.8Ghz with 1.38v. (100x48). It can do 5.0Ghz, but requires 1.425v to pass Intel's Xtreme Tuning stress test.

I only use the computer when at home, so it's off probably off 16-20 hours out of the day (meaning no CPU usage obviously lol).

Temps under full load @ 5.0Ghz @ 1.425v were 78/78/76/77. While gaming, they only hit around 55-60C.

I forgot to mention that at idling (i.e. doing nothing or just browsing the interwebz), temps are around 31-32C (yes @ 5Ghz, 1.425v).

I know 1.425 is a bit ballsy for this CPU :)eek:), but given I only run the PC for a few hours at a time, is this a safe voltage, given my temps are in check?
 
As far as I know, when temps are in check, voltage concerns have more to do with electron migration and enhanced degradation of the chip. "Safe" voltage recommendations are to ensure the chips makes it to/past the warranty date.
 
i'd run 1.425v for benching...But to me that seems kind of a high voltage for a Haswell (22nm) chip to be running most of the time (~4/6/8 hrs. daily). Wouldn't running your 4790K at ~4.7Ghz for gaming be fast enough??

I run my AMD FX daily with ~1.400v/1.425v/1.450v but it is AMD and also 32nm... I usually like to keep more recent Intel chips at ~1.3v or less for daily 24/7 operation. However I'm currently testing an Ivy-Bridge-E chip (22nm) 4930K at ~4666MHz with ~1.325v.
 
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I stick to 1.3 or so for 24/7 use, benching is a horse of another shoe size.
I also find that 4.6-4.8 is all that's really needed out of the cpu for game.
 
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