3930K @ 4GHz - x40 AutoV?

KristopherF

KristopherF

KristopherF

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14 Nov 2012
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Location
Greenock, UK
Hey guys just a quick check.

From what I have read, the 3930K can be OC to 4GHz off the bat without touching VCore. Is this right?

Right now I have these settings.

Multiplier - x40.
VCore - Auto.

Is this all I need to do? I am getting 4GHz, but didnt know if this is the correct way.

If I was to manualy enter VCore, would I need to change anything else? And if I did set VCore manually what settings would you recomend?
 
Sorry that I can't help you a massive amount but I'm pretty sure when overclocking you shouldn't have It on auto you need it to be controlled so the computer doesn't just throw power into your cpu. and are you using it stock? So no aftermarket cooling?
 
So here is what I have so far.....

This is with the BIOS set with 40x multiplier, 1.350 VCore. I take it the difference in CPU-Z on the VCore is what everyone calls vdroop?

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This is Intel Burn Test running at "very high". Don't worry about the idle temps (value) they are a little high as I had just finished running the test. I'm about to start "maximum" and will report back, but what are your thoughts on the results so far?
 
Damn, on maximum I got an hour into the stress test and it failed on Intel Burn Test. No BSOD or fatal crash, just got a message after the second test to say that it had became unstable.

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Whats your guys thoughts?
I must have a setting wrong, VCore is at 1.350 in BIOS thought that was well within range for 4GHz on the 3930K. There must be a setting in the BIOS perhaps?

Here are some photos of the BIOS.....

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Also, just a note for 8 Pack and others who provide any help.

This is what I am wanting to achieve:

3930K stable anywhere between 3.8 and 4.5GHz (I am not looking to pump this thing as I need a stable and reliable machine, so a little OC to give it some more juice but not straining it).

I will be using 64GB of RAM (Patriot Intel Extreme Masters 2x 32GB kit) (8x8) so all RAM slots will be populated.
I would like to keep RAM at the suggested speed of 1600MHz (9-9-9-24)

Anway just incase you need specs (there in sig):

Mobo: Gigabyte X79 UD-5
CPU: i7-3930K
Cooling: Corsair H100i Cooler
RAM: 64GB (2x32GB Packs/8x8GB) Patriot Intel Extreme Masters 1600MHz 9-9-9-24 1.5v
GPU: GeForce GTX 670 2GB DDR5
HDD1: Samsung 830 - 256GB SSD SATA3 - Intel Controller
HDD2: OCZ Agility 3 - 240GB SSD SATA3 - Intel Controller
HDD3: Samsung 830 - 128GB SSD SATA3 - Intel Controller
HDD4: Lacie 1TB 7200rpm eSATA External - Intel Controller
PSU: Antec 850W Gold PSU
Case: Antec P280 Case
 
64gb of RAM you have no chance getting it stable with less than stock IMC volts.IMC should be the same as VTT here try 1.050 on both and test again with zero CPU overclock. Do this testing with mem test you dont even say you did this. This is my first priority when clocking any system are the dimms stable. So many people just throw volts at a system and they still have no chance of getting it stable as the dimms are not!!!You may have to go as high as 1.2v on these with overclocked CPU and 64gb.

Infact post your memory settings please!!!

On to getting 4ghz stable. You should need about 1.225v loaded for 4ghz. Certainly no where near 1.35. 1.35 is 4.6+ territory on most chips and even more on good chips. Dial the Vcore down so loaded its around 1.225v.

Have you flashed to the latest Bios that solves the Vdroop issue on Gigabyte X79 boards? This is also important for stable volts when clocking.

So course of action:

1) Bios flash
2) Reset overclock, Enable XMP, Set DRAM volts to 1.65, PLL to 1.65v
2) VTT and IMC 1.05v+
3) Mem test.
4) Add CPU overclock with 1.225v loaded.
5) Tune VTT and IMC to get this stable.

This overclock is going to be totally dependent on your IMC on the CPU if you insist on 64gb of RAM.
 
Thanks for replying 8 Pack!

I am currently at work but as soon as I get in I will get onto this.
One note, I currently have 32GB of ram installed as the other 32gb had a fault in one of the modules so I am awaiting OCUK to replace it, shouldnt be too much longer.

So from looking at what you have suggested, tonight I will do the following:

1. BIOS flash to F13
2. Clear CMOS and make sure everything is running at stock.
3. Enable XMP and make sure it posts
4. Set DRAM and PLL to 1.65v
5. Set VTT and IMC to 1.05v
6. Run MemTest86
7. Add CPU OC to 4.0GHz with x40 Multi and 1.225v on VCore
8. Tweek VTT and IMC.

I take it when I revert everything to stock after the BIOS flash, it will all be set to AUTO?

As for Ram settings, I am using stock settings at the moment. XMP would not post for some reason so I went in and did it manually with the manufactures specs.

I have ran MemTest a number of times and can positively say that the Mobo is fine, and the Ram I have at the moment is also working fine.

I'll let you know the results this eve!
 
Yes you should and load defaults after flashing too!!!

I presume users overclocking there PC's know how to flash bios.
 
i should mentiom bsods were when i had oc. back at stock now testing mem again just with xmp and nothing else.


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