Working Out Offset Voltage X79

OLDPHART

OLDPHART

OLDPHART

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Hi 8pack, just built a Asus x79 Deluxe mobo+4820k combo+TeamGroup 2133 ram and l must say its a very good combination, stable overclock at 4.6ghz 1.344v>CPU-Z ram at 2133mhz for 24/7 running with very good temps Custom H2o Cooled.

Your help needed to see if l'm on the right track, to find the offset voltage needed see example below -

4820k 3.9ghz at stock at 100% load say l need 1.232v[CPU-Z], them OC'd at 4.6ghz voltage need is 1.344v[CPU-Z].

Do l just take away stock voltage at 100% load>1.232v from OC'd voltage at 100% load>1.344v=offset voltage +/-.

1.344v - 1.232v=0.112v is your offset voltage.

So in this case offset would be +0.112v, Bios offset would be nearest setting.

As it worked out my offset voltage is +0.085v giving me 1.344v[CPU-Z] seems to be ok and stable, temps good.

Thanks,
Oldphart.
 
Yeah you have the right idea. Its not always that predictable though sadly as offset is dictated to by the CPU its self and differing loads give fluctuation.

If your stable your good to go.
 
8 Pack said:
For Vantage and dual card you benefit from going dual channel on RAM. Helps CPU score.
Click to expand...

Right thanks again, but more than happy with the score. I remember you saying 2133mhz is the sweet spot for x79.

Using TG Gold 2133 - 10-11-11-30-1T seems to be my best timings at 2133mhz for my ram using RealBench to test.

As 2400 was out of stock when ordering.

But the ram will OC to 2400 - 11-12-12-30-1t 1.650V and stable would l get any benefit at 2400?

Thanks,
Oldphart.
 
OLDPHART said:
Right thanks again, but more than happy with the score. I remember you saying 2133mhz is the sweet spot for x79.

Using TG Gold 2133 - 10-11-11-30-1T seems to be my best timings at 2133mhz for my ram using RealBench to test.

As 2400 was out of stock when ordering.

But the ram will OC to 2400 - 11-12-12-30-1t 1.650V and stable would l get any benefit at 2400?

Thanks,
Oldphart.
Click to expand...

End of the day anything from budget 1600 to stupidly expensive 3GHz stuff will be within a few percent of each other aside from specific niches.

What combination of RAM settings gives the best performance depends a lot on what your doing. 2133 @ CAS9 seems to give the best balance of performance - over a large number of different applications it will have the most wins and/or if its not the fastest won't be the slowest either. Anything around 2133 CAS9 or 2400 CAS9/10 will be fairly close to that performance bracket.
 
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