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2.4C OC assistance please

SilverSliver

SilverSliver

[H]F Junkie
2FA
Joined
Feb 23, 2004
Messages
13,149
System specs

IC7-G mobo, rev 1.1, bios 21
P4 2.4C
Herc 9800 Pro
Audigy 2
Corsair TwinX 512x2 pc3200 C2PT
Win XP Pro SP1


Problem


Im trying to run 250 FSB on a 5:4 divider for 250/200 respectively. I pump 1.6v into the core, 2.7 or 2.8 into the ram. Ram timings are 2:3:3:8, but I normally run them at 2:3:2:6 with no problems.

If I run it at a 3:2 divider, 250/167 respectively, I have no problems, but the speed increase isn't what I would hope for.

GAT is A:A:A:D:D
RAM bios cacheables are disabled
PCB strap is PCB800
AGP/PCI is fixed

I run in 5/4 divider 250/200 respectively and this is what happens

It will post, boot, do everything fine. It seems stable in Windows. I can bench with PCmark and run Sandra tests. It passes Memtest 86 fine, 5 passes no errors.

But then I get random syntax/line etc errors when LOADING the next tests in 3dmark03. It seems random. Sometimes I can get through the first 4 fine, get my score, and be done. Sometimes I have to retry a few times.

PC mark runs fine, gives a nice score, Sandra is fine, memtest 86 is fine...

Whether I have stock volts or 1.6-7 volts running to vcore doesnt change this. My ram timings and voltage also isn't effecting this as I've tried everything from stock volts/timings to heavily relaxed, 2.6/7/8 volts, etc, etc.

How to fix?

I've seen CPU thrm throttling in the bios, and heard that If I disable this, it will help, any truth? My temps are great, at 250FSB im getting 39/47C.

Off hand question

With my abit board, should I update to the newer 875p chipset drivers on Intel's site, or stick with the ones released off of Abit's site? Does it make a difference?

-- Could it be my PSU? I don't see how that would affect whether or not it decides to not load up a line of code while loading the next test...but I do notice, as soon as heavy load hits during testing, my TT fan does get a little quieter like the RPM's lowered.

Its a Turbolink 420W, not the greatest but it came with the case.
 
Come on [H]'ers -- I know someone can point me in the right direction, you wouldn't want the guys over at the Futuremark boards to show you up, now would you?
 
you probably have reached the limit of your chip. i have mine running around 3.0ghz(p4 2.4c) and no matter what i can't get it much higher than that 250 FSB, even w/ better ram(friends mushkin lv 2 black) and going all the way up to 1.8V to the core. temps are just fine though, even on air.
i can post/boot well over a 260fsb, but i get errors anything higher than 258 almost immediately in windows, and random errors over 255 after a few minutes regardless of the settings.

weird huh? Doesn’t seem to be my PSU or mobo at this point, running fine w/ a 250fsb. Want to go higher though.


edit: what was your stock voltage. min was 1.525, i know that the p4C's w/ stock core voltages around 1.450 can OC way past what i have no problem.
 
I do know that some boards have trouble running with the memory divider at 5:4 or 3:2, especially when you go over 250 FSB.
 
I posted this in another thread and it sounds like it may be of interest to you as well, especialy since you're running an IC7 based board.

Read a bit through this thread and see if any of that sounds familiar to the problem you're having. Basicly Intel 865/875 boards seem to have weird incompatibilities with memory modules using CH-5 chips; people can't seem to get past the 250mhz FSB range when using either 5:4 or 3:2.

I recently upgraded and had a problem very similar to yours, at 1:1 my memory (Mushkin LV1 PC3500) with lose timings worked fine into the 240mhz FSB range, so one would think that at a 5:4 ratio my FSB should be good all the way up to 300mhz, assuming of course my CPU could make it that high. Instead I found that I around 250mhz I hit a wall and there was nothing I could do to get past it.. For three days I was pulling my hair out trying to think of what I was doing wrong, ad then I found that thread.

I've since ordered some GEIL Golden Dragon modules as I hear they pretty much have no problems with my board (Abit IC7), they'll be here Monday and hopefuly will be the answer to my troubles.
Click to expand...
 
Do you have the cpc and one above it disabled under GAT???


Don't worry about theraml throttling cause that likely wont kick in until high 60's low 70's......

At what Fsb does this error not occur???

If you think it is power list you power specs at idle and load....


I have same setup as you but geil ram and enermax 430watt power supply....


On my board with my geil chips I had to switch to 3:2 at 255fsb or get errors in prime95 and memtest (10 passes)....At 260 it was unbootable at 5:4 even though it ran 1:1 at 233fsb....Switching to 3:2 I could use cas 2,3,3,8..I held auto on first 3 GAT settings and disabled the last 2....I am at 292fsb for the last 3 months with only 1.6v....


Other things I do....

1) vagp = 1.6v...place some AS on it....
2) vdimm 2.8v (it undervolts to 2.77v under load)
3) make sure the 2nd and 3rd cas timings are not less then 3 as I haven't seen any combinatiosn of thse work for me....

the first 3 added together should be the last timing...IE cas 2,3,3,8 (2+3+3=8) may even try a 4 in there as well...
 
The error wont occur when I have my 3:2 divider up at 250/167.

255/170 however, will generally lock up.

5:4 simply wont be stable, 250/200, even though my ram is rated for the 200 and with relaxed timings and increased volts.

I have also seen the issues with CH-5 ram just simply not being very compatible with i875's, and if this is the case, I wonder if newegg would RMA for me for some BH-5 ram.

Let me know how your Geil Golden Dragon works, I was looking at getting some of that as well.
 
its the ch-5 wall. almost 100%. get some bh-5 lovin. dont think newgg would rma, better off just selling it and getting some muhkin lvl2 or kingston 3200k2
 
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