Set vcore 1.3 at bios, cpu-z shows 1.288

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auygurbalik

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Dec 30, 2014
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Im new to OCing so will fire many non-sense question right away;

i5 2500k with msi p67a-gd65 (40x100mhz, will going to up 45)


- Set my vcore 1.3 at bios, but cpu-z/hwinfo shows 1.296 at vcore (1.288 at load). Is this normal?
- My 4 cores are randomly either 16 or 40 multiplier (1600 or 4000 mhz) when idling or load, is there way to step it or thats normal? what should i set EIST and c1e to achieve that?
- What is overspeed protection do? Should i disable it?
- there is ratio limits (1-core ratio limit, 2-core ratio limit etc) at bios that set to 37-36-35-34 even tho im using 40x multiplier, do i need to change them?
 
Solution
RaDiKaL_
Yes it is normal to see a slight variance from the vcore you set at BIOS, even more so during load. One can force the vcore to stay closer to the value you chose by adjusting the Load Line Calibration (LLC) in BIOS, but your variance is minimal so I'd say its already at the best possible value. It also depends on the quality of your PSU.

Idle and load multiplier values will vary as long as you have EIST and C1E enabled, you could and should disable them when pushing for a quite high OC to eliminate any instability issues. Just keep in mind that by disabling them you'll keep your CPU running at max speed even while only browsing, not really an efficient use of it and keeping it hotter than needed. It all comes down to your preference as...
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RaDiKaL_

RaDiKaL_

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Apr 17, 2006
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Yes it is normal to see a slight variance from the vcore you set at BIOS, even more so during load. One can force the vcore to stay closer to the value you chose by adjusting the Load Line Calibration (LLC) in BIOS, but your variance is minimal so I'd say its already at the best possible value. It also depends on the quality of your PSU.

Idle and load multiplier values will vary as long as you have EIST and C1E enabled, you could and should disable them when pushing for a quite high OC to eliminate any instability issues. Just keep in mind that by disabling them you'll keep your CPU running at max speed even while only browsing, not really an efficient use of it and keeping it hotter than needed. It all comes down to your preference as long as you achieve stability.


No idea on the last two options you mentioned, hopefully somebody else can clarify your doubts.
 
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