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Haswell Overclocking Guide [With Statistics] - Page 599

post #5981 of 19539
ahhh, gotcha
post #5982 of 19539
Quote:
Originally Posted by fleetfeather View Post

Yep I understand. It's just annoying when I set 1.25, 1.26 and 1.27 VID and all three result in 1.28vcore haha

That tends to happen for me as well. 1.25, 1.26, 1.265, all result in 1.28vcore for me. Doesn't seem to be a board issue, so it might just have to do with the way it's handled. Sometimes, it doesn't even hit 1.28v at load. I think if I were to run an AVX test, it would.
post #5983 of 19539
Software only reads voltage in large steps, like 1.256, 1.264 etc. Best practice is to either get a multimeter, or assume it'll target what you set +0.02 and that software isn't too accurate with the third and especially fourth digit, it's just an approximation
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post #5984 of 19539
Curious as to what people saw in terms of core temp increase when uping Vring?
post #5985 of 19539
Nobody really tested it, because there's little reason to use high vring on a 24/7 overclock - 400mhz increase on uncore meaning half a percent increase in some benches, and most i'd guess needing under 1.2 ring for 4.0ghz uncore - there's little reason to pass 1.25 ring, and little temp decrease from lowering uncore further down than ~40x
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post #5986 of 19539
Quote:
Originally Posted by Cyro999 View Post

Nobody really tested it, because there's little reason to use high vring on a 24/7 overclock - 400mhz increase on uncore meaning half a percent increase in some benches, and most i'd guess needing under 1.2 ring for 4.0ghz uncore - there's little reason to pass 1.25 ring, and little temp decrease from lowering uncore further down than ~40x

Great, thanks. Long overdue, but +rep
post #5987 of 19539
I actually tested vring trying to get a 1:1 ratio which I did and was unhappy with. I only tested increase in vring but until I hit 1.3 the increase in temp is negligible. I would say even 1.3 and over and after monitoring and testing for weeks it was like 2-3c which I believe is well within the margin of error as well as fluctuation in room temp. However, the test did should that in the case of my chip, increasing voltage and trying to get 1:1 affected performance negatively instead of increasing it. Like cyro999 say, the increase was not much and only a few point different in benchmarks but I decided the higher voltage was not what I was comfortable with running it 24/7. I settle on a number I felt gave me optimal balance in power and operation.

In my opinion, vcore is still the one and only reason for high temp and pushing more power anywhere else did not give any better performance. Maybe smoother operation in some benchmarks and rendering but nothing you will notice day to day usage. With haswell, too much power can be a bad thing, a balance need to be found.
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post #5988 of 19539
yep, i've been playing with a few more values lately now that i'm approaching stability.

Vring had no impact for me between 1.15v-1.28v
VRIN had no impact for me between 1.76v-1.95v

cheers guys
post #5989 of 19539
For the asus guys increasing Cpu eventual voltage can have a affect on overclock stability they recommend having it .45 volts higher than vcore.
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post #5990 of 19539
Eventual VRIN is just.. VRIN. 0.45v is probably a minimum above
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