Originally Posted by GTR Mclaren
I want to OC my CPU to 3.4GHz...its difficult ??
its not the black edition...my mobo is an 785 chip and my ram is kingston 1333
It's difficult as in you've tried and failed, or asking if it's difficult?
I've got a 785G chipset on my Mobo, DDR2 1066Mhz.
We pretty much have the same CPU, except mine's more likely to crumble under higher OC's as my 3rd and 4th core are unlocked.
Depending on the revision (C2 or C3), will determine your likely max OC.
I have a C2, if yours is a C2, you can expect to struggle with a max OC of 3.8Ghz keeping under 1.50v and decent temps.
However, 3.5 should be relatively easy for you, depending on your temps.
I reached 3.5 with 1.375v, don't remember my temps, but they couldn't have been higher than 45-47c in my old case under Prime95.
I didn't push higher 'cos my PSU is a pile of fail, and I don't wanna increase voltages under a cheap-o PSU like this, am gonna use a 600w StealthXstream 2 temporarily and push the OC on both my CPU and GPU, whenever it arrives, hopefully by Friday.
Getting myself a HX850 sometime in Jan to replace that.
Hit the BIOS up and make sure Cool'n'Quite is disabled.
One thing to note, if your CPU cooler's fan is plugged into the Mobo SysFan header, you'll need to disable Smartstep in the BIOS in order to keep your fan running at full speed.
Drop your RAM speed down to 1066-1100Mhz using the DRAM Ratio, drop your HT link from x10 to x9 then start increasing the FSB/HT-Ref clock from 200 to 214, that'll give you a clock speed of 3210Mhz, check your temps with HWMonitor
or Everest/now known as AIDA
, run it as soon as you log into Windows, and keep it visible in the background while running your tests, also have CPU-Z
running to keep a check on the voltages it's taking while under the tests and stock.
Max CPU temp you ever wanna see under load ideally
is 55c for stability's sake, 60c for absolute max under hours of Prime95 or severe stress-testing.
to find out in HWMonitor, what TEMPIN0/1 or 2 your CPU temp is, check your BIOS CPU temp, and correlate what one it is.
You'll probably have one of those three sensors in HWMonitor tell you something is at 100c+ or -100c+, don't worry about that.
If your temps are fine running Prime95
after a 15-30min run of small FFT Tests, I.E. Under 50c, to give you more Overclocking headroom for the next bump, you can go back into the BIOS and increase your HT-Ref to 220 (220x15= 3300
Mhz clock speed), save and exit and go back into Windows, checking your temps all the time, rinse and repeat the Prime95 testing.
If you're still golden under 50c, or under 52c, you can try for your 3.4Ghz speed with a HT-Ref of 227.
If your temps exceed 55c-60c, you probably need a new cooler before going further.
There's no reason you can't hit 3.4 on stockish voltages, providing your temps are good. Given case airflow is freaking awesome in these things, it'll only be your CPU cooler to blame.
Check your RAM's current frequency with CPU-Z's Memory
tab, or via BIOS, and adjust the DRAM Ratio to get your 1333Mhz speeds back up. Testing with a quick 15-30min Blend Test in Prime95, to make sure your RAM and IMC are stable. Should be fine though under 3.5Ghz.Edited by EvoBeardy - 12/22/10 at 7:58am