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Sandy Bridge overclocked VID and VCore explanation? - Page 3

post #21 of 22
24/7 means you've found a stable overclock at a safe vcore setting. 99% of us shoot for 24/7. The 1% will push dangerous vcore voltage for a few hours stable run of high overclocks to benchmark (trying to get high scores on benchmark programs). But the voltage would damage the CPU over the long term.

You definitely want a 24/7 overclock that is safe for the CPU's lifespan, and stable enough to not crash when gaming, doing school work, etc.
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post #22 of 22
Quote:
Originally Posted by bond10 View Post

Alright, after letting it run for 24 hours, I've been stable (temps under 70, VCore maxes at 1.352, VID maxes at 1.431). There is the downclocking to 3300 mhz for 2 seconds (stock level) for every 4 seconds of 4800 mhz. Are you sure I can ignore VID? It's way higher than than VCore.

 

As I said, the VID is not the voltage that's powering (and going through) the CPU. 1.352V is. Also, each multiplier and clock speed has its own VID. So you will see it changing as the multiplier and clock speed changes. In the old days, we used to overclock by adjusting the FSB and leaving the multiplier alone, and so that is why ericeod said that the VID used to seem like it was just a constant - even though it would have changed with an adjustment to the multiplier.

 

Quote:
Originally Posted by bond10 View Post


So there would be no risk in my set up where the VID is way higher than the VCore as long as it's stable and temps are good. It was just freaking me out because if the chip requires 1.421 voltage but only 1.352 is being supplied, I figured this would be unstable and cause my computer to shut down sometimes due to not enough voltage. Also, is there a rule for 24/7 set ups? I've heard of this term and can't figure out what the difference is between a 24/7 and a benchmark set up. Is 4.8 ghz (my max without crashing and stable on prime95 for 24 hours) a benchmark set up or 24/7?

Thanks for all your help btw.

 

If it's truly requesting 1.421V and achieving 1.352V, then that's a sign that vDroop is being 100% allowed, meaning there's no control over it right now whatsoever. VDroop is controlled (restricted) by increasing the Load-Line Calibration setting which is called "VDroop Control" by some motherboards.

 

Anyway, "24/7" just means that you keep your clock at the same clock 24/7. Some people will do short runs at super-high clocks but then their "24/7" clock speed is like..... 4.5 GHz or something. Or 4.8. lol :)


Edited by TwoCables - 2/15/16 at 12:48am
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