Help Overclock X58A-UD3, i7-950, with H100

[Samuel Chavles]

Hey all,
I did some research on the site before hand and found some settings that worked great! But unfortunately were not stable. Whenever I would play video my machine would freeze up and require force shut down.
Currently Im on all stock settings, when I was already overclocked at 4.2 I used the following:
21x200 bclk = 4.2ghz
system performance enhance to standard
cpu clock drive to 800mv
pci expres clock drive to 900mv
spd memory multiplier manually to give me 1066 ram speed (I have 1333 but it wont read it in 1333 for some reason)
set uncore freq to 17x
Around 1.45v for both qpi/vtt and cpu voltage

So all this was running fine but, anymore suggestions on stability?

[Acebmxer]

We can better help you if you could please include a complete detailed list of your hardware and put it into your profile or put into your sig.

Have you run any stability tests like LinX/IBT or Prime95? If so what test, how long, Max memory?

[Samuel Chavles]

Ok I will update my sig but here are my specs:
X58A-UD3R Rev 2.0 Bios version FF
i7 950 Stock 3.2 Ghz
G.SKILL 12GB (6 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333
Nvidia GTX 260
Kingston SSDNow SSD
NZXT Phantom Case, H100 with push pull 200mm on top and 2 120 mm under.'

And I didn't run prime95 or any stability tests because of the fact it wasn't stable from the change when watching a video.

[wazza300]

could be your ram,12gb will be hard to get stable,esp with a 4.2ghz oc

[Samuel Chavles]

Well the ram is clocking at 1066 for some reason, even though it is 1333 mhz ram. So you are saying I need more ram in order to get a stable OC? How high can I go do you think? I bought the H100 to OC high and if I need to buy more ram I will.

[wazza300]

no i think maybe its because you have 12gb of ram,with 6gb it would be easier to get stable and run at 1333mhz,the more ram you have to harder it is to overclock and be stable,you simply might need more qpi/vtt,that could be why its defaulting back to 1066mhz speed

[Acebmxer]

Yeah I did not notice the 12gb ram. I was playing with my 920 and 930 a week or so again and my 930 needed 1.555 qpi/vtt to run stock speed and 12gb ram at 1600 9-9-9-28 1t. My 920 could do 18gb ram at 160 bclk and ram speed of 1333 or 1600 dont remember what I left it at but only needs 1.455 qpi/vtt. Both test uncore should have been 2x memory.