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What's Holding Back my Overclock?

J

Josh_Hayes

Limp Gawd
Joined
Apr 10, 2002
Messages
277
I have a 2.8C P4 - SL6Z5 Spec - M0 Stepping CPU
2 x 512MB OCZ EL DDR PC4200 2.5-4-4-7 @ 266/533FSB
Asus P4C800-E Deluxe Motherboard w/ 1016 BIOS
400w PC Power & Cooling Silencer PSU

I can run stable at 266FSB / 3.7GHz / 1:1 Memory Ratio / Turbo / PAT Enabled, but I absolutely cannot go even one 1MHz faster without getting an error in Prime95.

What is holding me back? My CPU registers 32* Idle and 52* with CPUBurn so my temps seem fine.

Anandtech showed this memory as overclocking to 560MHz FSB @ 2.85v on this board and even running at 2.5-3-4-7 at 533MHz FSB.

Any hope of me hitting 3.8GHz or higher?
 
I had a 2,6c that wouldnt go past 2.85ghz no matter what sometimes its just the cpu
On your setup I would try a different psu maybe not enough juice I know its my problem besides heat to go past 3.82ghz
 
You have some nice ram there!! You want to go a little bit more higher then Vdimm your board so you can pump more juice to your ram...Put more volts to your CPU coz that voltage flux on your mobo is holding you back.......try setting it at 1.77V when you load it to windows you will exactly get 1.66V real voltage for the CPU..I think spending more loot for ram to make your setup go higher is pointless.....
 
Nothings holding you back aside from heat and maybe voltage fluctuations as stated earlier. Either the voltage droop mod for the Asus motherboard is in order or try increasing the VDIMM voltage. However you may have just actually hit the ceiling of what your processor can do. If your on air cooling be happy. 2.8 to 3.7GHz is a 900MHz overclock. Something to be proud of for sure.
 
The other possibility is that your chip and RAM just can't handle any more. The stuff shown on Anandtech might be the same product, but no two silicon chips are the same. Be glad with what you already got out of this.
 
nice overclock on air. i want your chip :D
mine could only do 270 FSB x 12 @ 1.675 unstable. memory rated at 550 or 275mhz. u could watercool it.
 
I tried lowering my RAM timings to 3-4-4-8, disabled PAT, increased VCore to 1.6v, increased VAGP to 1.8v, already running at 2.85v VDIMM. Nothing I do will let me go any higher... I think I might need some active cooling on my northbridge. Anyone tried mounting an active cooler on this board with a Zalman 7000alcu?
 
tried going to a higher jump? maybe it just doesnt like running at the one or two specific speeds...
 
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