help Fine-tuning 24/7 3930k OC 4.3-4.5 GHz for product rendering workflow

Hi,

I recently bought a brand new workstation, to be used primarily for product rendering (KeyShot).
It has the following core components:

• Asus P9X79 DELUXE
• Intel 3930k
• Corsair H100 cooler
• 2 x Patriot Viper Xtreme Series, Division Viper 2 Edition DDR3 8GB 2133MHz PXD38G2133C11K (11-11-11-30, 1.65V)
• Corsair AX750 PSU

I had the 3930k overclocked to 4.3 GHz by the shop that built it. It was done through XMP by simply setting the multiplier to 43 (nothing else changed).
This gave great results in KeyShot, but I noticed vcore was hiting 1.42V under load and temps easily rose to 75°C.


So I decided to attempt a (safe) overclock on my own.
Summary of my BIOS settings:

• AI Overclock Tuner = manual
• BCLK = 100
• multiplier = 43
• Memory = DDR3-2133
• CPU VCORE = manual @ 1.25V
• DRAM Voltage = 1.65V
• DRAM Timings = primary @ 11-11-11-30-3

The following screens show what I ended up with in detail.










These settings give me the same performance in KeyShot, but with a max temp of 65°C. This is a great improvement already in my book.
I haven't run any stability stress tests (prime95...).

I'm by no means an OC expert so I'm calling out on you guys for great advice to improve my OC.

My goals:

• An OC in the range 4.3 - 4.5 GHz
• CPU temps in the range 60°C - 70°C under full load
• Lowest possible VCORE (what else? ...)

My concerns with my current OC:

• VCORE is fixed now @ 1.25V. Does this degrade CPU over time? Can it be set to be dynamic with a max. of 1.25V?
• Am i missing some crucial votage settings? Should I have set certain voltages to a specific value (to start off with) where I now have 'auto'?

I hope you guys can help me out.

greetings,
Dries
Edited by DriesV - 6/10/12 at 1:55pm

Hi UltraVolta425,

H100 is in push. Case is a Corsair 600T. Radiator mounted on top.

So just multiplier to 47, VCORE (manually) to 1.35V and nothing else? Once I get home I will try these settings. Speedstep and all other energy saving features are enabled already...

4.7GHz seems a little high too me, though, for constant rendering in KeyShot. This program really maxes out all cores all the time. I really want something very stable. Isn't 4.7GHz pushing it? Is it safe to have a manual VCORE of 1.35V all the time? I would like to try using an offset voltage instead of manual fixed VCORE.
Any tips on how to approach this safely with a +/- 4.5GHz overclock in mind?

Tanks anyway for your reply !

greetings,
Dries

Tanks for pointing out .
I just used the default values of this kit for now. I'll definitely try 1T...

Would be greatly appreciated !

greetings,
Dries

Okay guys,

I've been playing a bit with some settings in BIOS.

Tried multiplier 45, with offset - 0.02, PLL 1.8V, VTT 1.25V, VCCSA 1.1V, LLC high (50%), CPU current cap. 130%, phase duty extreme, phase mode optimized, phase frequency 350.
Seemed pretty OK inside KeyShot. Prime95 (blend) gave BSOD immediately, though .
Tried a bunch of other things with multiplier @ 45. Had BSOD again and again. Then realised I was just not feeling that comfortable fiddling with all these advanced settings & voltages (and probably not fully understanding my own interventions), thus reverted back to multiplier @ 43 and started from scratch. In the end 4.3GHz stable is what I'm aiming for...

This is what I have now:







I've just done some short runs on Prime95 (blend, 10 min.). Seems to be stable.

CPU-Z tells me about VCORE:
load: 1.296V
idle: 0.68V

Tmax with Prime95: 72°C

What can I further attempt to get to a lower stable VCORE? Is there room for further improving this 4.3GHz OC?
Any other remarks about the settings posted above are very welcome!

greetings,
Dries
Edited by DriesV - 6/11/12 at 1:08pm