Sad 2.4C Made in China

[Palumbo]

Hi guys, I'm trying to overclock a PIV 2.4C made in China with: DFI PRO875B and 2x512MB Mushkin 4000
I'm facing troubles when I put the FSB higher than 250... even with a high Vcore like 1.7 ( once the default is 1.52 and I can get 3.0 with default Vcore and can't get 3.2 even with 1.7 )
I don't know what is going on...I've tryed to put 3:2 and 5:4 but the system still freeze on benchmarcks tests, the better config that I've ever ran with this system was 250FSB 1:1 (Auto)
More than that I'm starting to think it's impossible or almost....:/
Well, you could say it's because the North Bridge temp. , so ...to get this trouble off....I tryed to put 3:2 and 5:4 but the system still freeze.
Could anyone help me with this problem?
I think the best I could do is sell this PIV and buy a PIV 3.0C
What do you guys think? Thanks.

[skate2snow]

Can I know what are your RAM's?

And it might be the chip. Its a rare china chip in circulation, and normally china are doing chips for OEM. I dont know why OEM whould be some less great OCer, but it might be a cause....

[Palumbo]

2x512MB Mushkin PC4000 Black , probably CH5.
I'm not sure if it's the chip, when it was borrowed with a friend he ran it as 3.2 with an Abit IC7-MAX3(using 1.65 Vcore or so), but I'm sure this CPU isn't very good for OC, I think I need to buy a 3.0 processor and overclock it for 3.7 with 250FSB... or arrange one with unlocked multiplier, I heard there are some of those(unlocked multiplier)

[Soulburner]

No, your PC4000 is going to be Hynix.

I say memory incompatibility with your board or just poor clocking RAM.

I don't think its your CPU.

[Karnivore]

I would definately check out memory, but Yours wouldn't be the first P4 that simply won't OC.... One 2.8 I had wouldn't do 3.0....

[Palumbo]

Wouldn't it be the chipset? Isn't 267 too high ( without extra cares about cooling system)?
I've tryed to put the Vdim up to 2.9 but it didn't work stable, seems anything was changed.
I think the best way is change my processor, even if the problem isn't it, but If I can do 250FSB normally, using a 3.0C processor and 250 de FSB , I'm going to have 3.7 Ghz, and it's a little better.

[saaya]

what temps?

[Soulburner]

A change of processor/multipler would definetely get you a higher clock.

I was just saying I don't think its your 2.4c thats quitting on you here.

[ZhaoYun]

What type of cooling are you using and what are your memory timings?

[Palumbo]

I'm using a Zalman 7000CU and the temps are Ok.

[boshi]

Originally posted by Palumbo
I'm using a Zalman 7000CU and the temps are Ok.

Ok sounds kinda hot. I would try for "cool", "quite cool" or "nearly ambient". I usually have MBM5 alert me when it gets to "Ok".

[Palumbo]

I'm starting to think that the problem is with the PATA, once I'm using 250 (1:1) and the problem when I use others divisors could be incompatibilities.
Once I can't change the multiplier, I don't have a way to change the Ghz... I would like to get more then 3.6Ghz. 250FSB is ok for me, but 3Ghz I don't like very much.
If I can't disable PATA at all, the unique way that I'm seeing is buying another processor, original 3.0Ghz, with 15x Multiplier...
Isn't there anyway to change the multiplier on a 2.4C?
Thanks.

[Soulburner]

Its not your PATA, the busses are locked.

And no all Intel chips are locked.

[Palumbo]

Then, I have no idea what's the problem... It may be caused by incompatibilies with Memory and MoBo divisors....I guess....

[Palumbo]

Well... I found a interesting thing:
When I'm running FSB 250, the CPU Z shows 3-4-4-8, but when I'm running higher than FSB250, the CPU Z shows 2.5-4-4-8, Couldn't it be a BIOS problem? Do you guys know a good Overclock BIOS for 875B Rev.B1?

[Playful_Buffalo]

try contacting DFI on this one (to make sure)