Asus P5B-E & E6600 - At 3.2 Ghz now, help me get to 3.6!

Intel Core 2 Duo E6600 2.4 Ghz
Asus P5B-E Mobo
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500)
Artic Freezer Pro 7
Artic Silver 5 Thermal Paste
CPU/Heatsink lapped


I'm running at 400x8 right now, and can achieve 3.2 ghz. Prime95 is stable for more than 10 hours, therefore I'm satisfied with stability.

My settings:

FSB: 400
Multiplier: 8
CPU vCore: 1.425
NB vCore: 1.55
SB/ICH: Auto
Memory Timings: 5-5-5-15
Memory Voltage: 2.0 V
DRAM: 800 mhz







I tried running 400x9, for a total of 3.6 ghz. The system boots into Windows fine, however Prime95 fails shortly after beginning a torture test. (but normal desktop usage appears OK)



Any ideas on how to safely get 3.6 ghz on air? I was running 1.5-1.55V for the above screenshot. (set in BIOS)

Also, I'm running memory at 800 mhz. I'm doing this to stay at a 1:1 ratio, which I've read is best, but 1000 mhz is stable too.

I also had 2 more GB of RAM, for a total of 6 GB, however my older 2x1 GB G.SKill DIMM's don't let my system boot when trying overclock with them. I've noticed the rated voltage for the older DIMM's is 1.8-2.0V, and the newer ones are rated at 2.0V-2.1V. I'm only running 2.0V on memory, but the older ones still won't let the system boot into Windows. (BSOD error) They both support 5-5-5-15, but they differ in total speed supported. (800 vs. 1066)

Link to older DIMMs: http://www.newegg.com/Product/Prod [...] 6820231098

So my RAM setup is:
2x2 GB (1066)
2x1 GB (800)

Any thoughts on how to fix this? Preferably I'd like to get this system setup with a stable overclock, with my full 6 GB. I'm only running 4 GB now, but hoping to get past this issue.



Thanks,
Ace

Yes it can. I've set it to 400x9, but the system will fail Prime95, when running with 1.55V.

Just an update:

Looks like I've fixed my memory issues. I'm now running all 6GB, with timings of 4-4-4-12, matched up with a Memory Voltage of 2.15v. (2.1 wasn't fully stable during reboots, etc)

I'm still at 3.2 ghz, and this system really flies! I've decided to try and push it to 3.6 ghz. If the chip breaks, I'm not gonna sweat it. (thinking of doing an i7 build soon anyways)


Current vCore is 1.425, with 8x400 settings. I'd like to run 9x400. I can post and boot into Windows using 1.55V, but Prime95 is not stable. Any suggestions to increase stability? My NB vCore is 1.55V. (SB is auto)