Is there a way to test....

[Clstrphbc_donut]

if my processor or RAM has hit it's overclocking limit? I'm looking at a gig of very shiney OCZ 4000 RAM if i can find out its my RAM for definite. Current RAM is 2x512mb 3200 sticks of corsair value select, currently at 250FSB. I wanted 3GHz, i got, now i want more....

Also, comments on the OCZ on a P4P800?

Thanks in advance

[malfunction]

Only good way to test is to play around with your FSB:RAM ratios... Basically you need to keep the CPU at a known working speed and force the memory up (and vice versa)... That way you can be pretty sure what the separate limit is for each. (Though for extremely high FSBs it may infact be the chipset that's holding you back - I would guess you'd find the limits of the CPU and RAM first though)

[Clstrphbc_donut]

and how would i do that? (FSB:RAM bit) i can only find FSB in the bios. Would tightening the timings help me find if this is the RAM?

[malfunction]

Well I haven't been in the 'Intel camp' for a while now but there ought to be a ratio in your bios somewhere. People commonly talk about using a 1:1 or 5:4 ratio (5:4 - FSB:RAM so that if you were running the FSB at 250MHz the RAM would only be 200MHz and much more likely to work...)

You could actually try increasing the timings to help the RAM clock higher (but you still won't really know which one is crapping out first)

[malfunction]

Just been reading the manual for the P4P800... Looks like you can set the RAM to 266/333/400. Now these MAY be 'fixed' but I suspect it's actually using ratios to determine the clock frequencies therefore with a 800MHz FSB (by default - 200MHz quad pumped that is) this would mean that selecting:

DDR 400 = 1:1
DDR 333 = 6:5
DDR 266 = 3:2

If they're 'fixed' they could be actually fixed OR it could have more ratios to play with... So if you set your FSB to 250MHz and your RAM to DDR 400 it MIGHT be changing the ratio behind the scenes to 5:4 to keep the RAM at 200MHz

TBH you'd be better off asking someone with recent Intel overclocking experience!