Core i7 Overclocking by Batch #

[poke349]

i7 920 D0:
Batch: 3914A114

Asus Rampage II GENE
Cooler Master Hyper N520 with 2 x Delta FFB0912SH-F00 (@ 50% duty cycle for 24/7 use, @ 100% for benchmarking - they are VERY LOUD)
Stock ram speed: 1333 MHz

Stock vcore = 1.13v

3.36 GHz (21 x 160) stable with 1.13v
3.50 GHz (21 x 167) stable with 1.20v (my 24/7 configuration - at least 10 days stable under a near-equivalent prime95 load)
3.80 GHz (21 x 180) stable with 1.225v

There were no problems here. The vcore I used here are simply wild guesses. I haven't pushed it to see what the limits are.


Here's where I decided to see how far 1.225v would go.

4.0 GHz (21 x 191) stable with 1.225v
4.2 GHz (21 x 200) ~about a min. prime stable with 1.225v
4.2 GHz (21 x 200) stable with 1.250v


All other BIOS options set to auto except I never allowed the vram to go above 1.6v.


Good? Bad? Middle?



EDIT:

Here's my 24/7 config:
CPU - 3.34 GHz (3.50 GHz Turbo) - 20/21 x 167
Ram - 1333 MHz
vcore = 1.20v
vram = 1.60v (undervolted from 1.67 to reduce temps)

As mentioned: It is at least 10 days stable under a near-equivalent prime95 load.
I'd clock higher, but I run my rig under a prime95-equivalent load 24/7 and I want it to last a while.

Why 3.34 GHz?
It works well with my 1333 MHz ram: 167 x 8 = 1336 MHz