Originally Posted by agentx007
Well, LGA 775 is tricky when it comes to OC.
There are many things that need to be set for stable high OC.
Basic stuff is easy :
Vcore, FSB, DRAM Frequency/Timings/Voltage and VTT.
Set those right and with right board you can do pretty good.
It's the Advanced stuff like Straps, GTL's, "RAM Boosters" (ie. Perfromance Levels mostly), that give most people hard time when OC'ing to max.
Example : I was shocked that this guys didn't play with them at all, and he's got a phase cooling on that E8500 :
(interesting part starts @3:38:30).
a P5Q Pro Turbo is in fact easier to deal with than mine, since P5QC and P5KC , and almost all 775 ddr3 boards are known for not being stable at over 1333mhz. Using DDR2 , much developped , is easier.
For example, i have a ddr3 kingston HyperX blue, KHX1600c9d3b1k2/8gx rated at 1600mhz 9,9,9,24 1,65v. My board will not post at 1600 not even at stock settings. Not even introducing manually the settings.
I've done so many tries that i would need a hole hour to try explain the issue, but i've played with timings (i know for a fact that my ram will do 2133mhz at 1,70v 10,11,11,30 because those timings worked on my P9x79 deluxe paired with an e5 1650 at 4,9ghz). But this exact ram will not post at anything above 1350mhz on the memory in my P5QC no matter what i do.
i disabled memory training, tried auto, tried increasing NB voltage, tried going to 1,8v vram, tried fsb strap (weird as it may seem, some ram dividers do not work). For example, i cannot post at strap 400mhz and ddr3 950. But i will post at 1266mhz and 1359). does that make sense??
i tried OC mem mode, tried almost all straps and mem dividers, tried the clock twister, tried AI transaction booster at 1, 5, 9, 10, 15, 20, and 30. No way.
it seems to me that my Xeon cannot handle more that 1333mhz on the memory. It seems that. i haven't seen any X5460 working with ddr3 on my board so don't know where is the issue.
The best asus board with ddr3 outthere is the P5Q3 Deluxe Wifi. it allows ddr3 for more than 2.000mhz. indeed, i tried my ddr3 8 gigs savage 2400mhz on my P5QC. No post. not even reseting the bios. Then i remembered that this board does not recognize modules of over 4gigs.
Anyway, i'm happy with my board, not as happy as i would like to, but anyway it's very nice.