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Overclocking Using Offset Mode for CPU Core Voltage

X-ROG
Level 15
1,178 Views
25 REPLIES 25

Thomas
Level 10
A very good guide!

I believe more people would use Offset voltages if they understood them better as the advantages are worthwhile.
Thomas Jenner
Asus UK

Thanks for the guide. I will try this ASAP, I've just received a RIVE with a 3930K, time to play with it 🙂

Hi all! 🙂

I've used the Offset guide in the past with good success for a couple of 1115 boards, but I wonder, is
there anything which inparticular might differ when trying to setup an X79 system in the same way?
I have a P9X79 WS with 3930K C2, 64GB DDR3/2400. Reading the various guides, I was unsure
whether they're intended to be specific in some way to the Rampage/Maximus lines, or if the concepts
apply equally to all P9X79-named models aswell.

And any general advice on dealing with a config such as this (ie. max RAM) would be most welcome.
I've picked up a few items of note that relate to systems with high or max RAM, but I've probably
missed some too. Note that I'm aiming for 2133 if I can, just turned out 2400 kits were cheaper and
more available at the time of purchase, but 1866 is ok if 64GB is too much for 2133 to be viable.
Likewise, the target CPU clock is 4.8, but I'd be happy with 4.6 to 4.7 if the high RAM quantity limits
what can be done re this chip's particular IMC potential.

Thanks!!

Ian.

PS. The RAM is 8x8GB GSkill TridentX, 10-12-12-31 1.65V, F3-2400C10Q-32GTX (ie. 2x quad-8GB
kits), CPU cooler is a Phanteks PH-TC14PE Red with 3 x 14cm fans, Samsung 830 256GB SSD,
Quadro 4000 gfx, Thermaltake Toughpower 1kW PSU, Coolermaster HAF 932 case.
Maximus IV Extreme, 2700K @ 5.0, Corsair H80, 16GB DDR3/2133, GTX 460, 850 Pro, etc.

Thomas@Asus wrote:
A very good guide!

I believe more people would use Offset voltages if they understood them better as the advantages are worthwhile.


Have to disagree, its not helpful one bit.

happening wrote:
Have to disagree, its not helpful one bit.


I smell a troll. Of course it helps; reduced vcore when it's not needed, longer CPU
lifespan, etc. I'm sure Raja can extoll its virtues better than I'm able to though.

Ian.
Maximus IV Extreme, 2700K @ 5.0, Corsair H80, 16GB DDR3/2133, GTX 460, 850 Pro, etc.

HiVizMan
Level 40
The concepts are transferable across all platforms.

Depending on your CPU IMC you should have little problem with 2133MHz (64GB) BUT as I have indicated that is IMC related and is independent to the motherboard. You can make it less likely to be problematic, or put un-needed strain on the CPU IMC by buying a single matched kit and not try to mix and match even if the ram purchased appears to be the same model. There is no certainty that both or all kits used will have the same internal programming. Whereas a single kit has been so constructed.
To help us help you - please provide as much information about your system and the problem as possible.

HiVizMan writes:
> The concepts are transferable across all platforms.

Ah good. I figured that was probably the case as nobody had mentioned
to the contrary anywhere, but thought it was best to check. Reading the
forums, it's hard to tell if there's anything particularly different
between the P9X79-named products and the Rampage IV series in terms of
general oc potential, procedures, gotchas, etc.

It was staggeringly easy to do with my Maximus IV Extreme, but this is
my first X79 build.


> Depending on your CPU IMC you should have little problem with 2133MHz
> (64GB) BUT as I have indicated that is IMC related and is independent to
> the motherboard. ...

Yep, that certainly seems to be the consensus. I was just wondering if
there were any specific things that would help when using 64GB, especially
at 2133. So far I found the following in the various ASUS guides, etc.:

VCCSA LLC: probably needs be High or more for 2133, with VCCSA VID of 1.2,
though lower is better if possible.

VCCSA Current Capability: likely needs to be 140% for 64GB.

DRAM Current Capability: probably needs to be 130% for 64GB or > 1866MHz.

DRAM Timing Control: may need to use 'Raw MHz Profile' and might have to
add 1 or 2 to DRAM Write Latency for 64GB.


> ... You can make it less likely to be problematic, or put
> un-needed strain on the CPU IMC by buying a single matched kit and not

That would indeed have been ideal, but alas such was not available (very
few places sell the 64GB kits here, and the ones I did find only offered
much lower speeds). There was also a crazy price premium on the 64GB kits
which could not be covered by my client, so 2 x 32GB kits it had to be.

I'll see how it goes. If this board has anything like the quality of the
Maximus IV Extreme, I think it'll be just fine, perhaps with a bit of
effort required. On the MIVE I didn't have to do anything at all to obtain
16GB @ 2133 (4 x 4GB) with the CPU @ 5.0, very impressive indeed.

I expect what probably will require some extra tweaking is when the other
devices are added, ie. SAS RAID card (LSI SAS3082E-R), about 6 disks, a
second 256GB SSD, and an 800MHz GTX 460 for CUDA, ie. the extra power
loading. The system will be used for After Effects CS6, though I'll
benchmark it first for my site info (Google for "Ian PC Tests").


I plan on initial testing with manual/fixed vcore, etc., to get a feel
for typical idle/load voltages, temps & suchlike. Could easily be the
attainable oc is limited by temps rather than what the CPU could really
do (ie. as I'm only using air, albeit the Phanteks with 3 fans which is
supposed to be the best atm). I'd like to keep load temps below 75C.

Even without an oc though, I was impressed to note the system is quicker
than my 2700K @ 5.0 for CB10, and *almost* as good as my Dell T7500 with
2x XEON X5570 @ 3.2 (that was unexpected).

Thanks! 😎

Ian.
Maximus IV Extreme, 2700K @ 5.0, Corsair H80, 16GB DDR3/2133, GTX 460, 850 Pro, etc.

HiVizMan
Level 40
All good Ian, the ASUS channel boards are very good, and do the job well. They are often easier to set up because their are less finniky options that need adjusting. And in truth you really only kneed to set 7 parameters for a full OC - CPU and memory. You do seem to have it pretty much sorted and well in hand. If for what ever reason you do need to bounce some different ways of getting your system up to speed please do post back. It would be best to start your own thread in truth.
To help us help you - please provide as much information about your system and the problem as possible.

Thanks for the comments, etc.! I begin the testing in earnest tomorrow. Indeed, if I run into issues, I'll start a
separate thread, but atm I'm reasonably confident it'll work ok.

Ian.
Maximus IV Extreme, 2700K @ 5.0, Corsair H80, 16GB DDR3/2133, GTX 460, 850 Pro, etc.