Help needed with overclocking on a P5B dlx

tomos · 13 Nov 2006 at 02:15

i have an old PD 805 and am running it on the p5b deluxe mobo.

in the past i couldnt get it clocked at all but messed around with some settings and got it going @ 190 fsb.

problem is, its not stable. the CPU is fine but memtest fails. the RAM is pc4300 and i left the RAM on auto. i changed it to 4300 but the pc wouldnt boot after that and had to reset the bios.

does this mobo have a problem with dividers? if so, any way around it?

Its_Me · 13 Nov 2006 at 02:42

P5B is a pig to clock with any 533 chip. Your doing well to get it to 190

snowdog · 13 Nov 2006 at 09:33

Set Ram to 1:1 or 5:4 to the cpu ( select ddr freq 400/333 in bios), probab poor clocking ram...

Also increase vcore a bit till about 1.45 (or higher)then it should do a lot more...

harris1986 · 13 Nov 2006 at 11:11

you can't select down lower multipliers on the p5b dlx, the short answer is the ram you are running is too poor, upgrade to a 1gb set of pc6400 and this will offer you excellent headroom! the pc5300 stuff i have with my dlx allows me to get to 400mhz fairly comfortably! also what bios revision are you using?

tomos · 13 Nov 2006 at 13:38

latest bios mate.

am running the cpu @ 1.35v at the mo and thats ok,it passes prime for 12 hours without a hitch. its the RAM thats the prob

will try to get the RAM on looser timings but failing that, will have to wait till i can swap this RAM with my geil 6400 hz ram

harris1986 · 13 Nov 2006 at 18:27

kk fella well basically you are going to be limited by that ram as the max i think you'l get is 200-210mhz because it's low speed, so personally i'd say just get some better ram pop them in then you should be good for 400-450! everyone is saying the p5b is a average clocking board mine's been excellent i can't really complain!

tomos · 13 Nov 2006 at 19:27

yolu're right, deffo the RAM

took out that RAM and popped in some crucial 256meg ram i had lying around and it booted straight off the bat @ 200fsb. some RAM errors there tho.

will probably put my g.skill ram in there and see how it fares

damn numbers in ddr2 threw me off

ta for the help lads, will probably sell the RAM again on MM