for E5400, anything below 1.4v is safe. try stay below 1.35v.

I can get E5800(Original 3.2GHz) to 3.83GHz(333MHzx11) @ 1.32v no prob. I think u should be able to get pretty stable below 1.35v.

what the heck u talking about? E5800 is the same chip as E5400.

OC in BIOS not software.

3.5 is pretty much can be run on stock voltage on E5000 series. E5000 are knowned to run @ 3.7-3.8GHz easy. *45nm. Extreme part may be 4GHz. but that req a lot of voltage. u can try 3.7GHz. I am not sure if u can hit 3.8 with decent voltage or not since mine is a better chip E5800.

667 RAM should have no trouble feeding 333FSB, Check ur RAM ratio in BIOS, make sure is below 667.

Without upping vcore 3.5-3.6GHz is max u could go. With vcore up 3.8 is easy.

my E5800 is stock 3.2GHz at default vcore 1.25v

3.73GHz(266x14) @ 1.29v
3.83GHz(333x11.5) @ 1.325v

I tried 1.3625v(intel's max) @ 4GHz, failed so far.

I never need to tune my ram, just change FSB/ Ram ratio to keep it at the spec.

Pentium dual core E6000 series are the same thing with E5000 except the FSB is higher @ 1066 and multiplier is lower. Overclockability will be limit by FSB + lower multi.


it is rumor that some E5000 have trouble hitting 333FSB cap at ~300. (most probably the ealier version of E5000, E6000 should be easier on higher FSB.

mine E5800 can hit 333 without issue tho.

This post has been edited by Boldnut: Jun 30 2012, 11:16 PM

1. pointless anyway, 400FSB it is out of mobo spec, i wouldnt bother running something out of mobo spec. 333 would do good. I got 16 multi, = if use 333FSb =333x16 = 5.333GHz, no way a CPU can hit that high lol.
2. I am using G41 chipset = FSB Cap @ 340.
3. Anything above 3.8GHz voltage requirement skyrocket. I need to hit 1.34-1.35v to get it stable @ 3.83GHz
4. Currently I settle @ 1.29v (0.01v above stock = 1.28v) @ 3.66GHz. all good enough

mine is E5800 dual core cpu. 1.29v @ 3.66GHz. (333x11 multi)

stock is 1.28v @ 3.2GHz. (200x16 multi)

@ the same frequency usually no diff. in vcore.