Overclocking Thread of Celeron D (Cedar Mill) on P45 Chipset or any Unfriendly Mobo

[Antinomy]

Please tell me how to move this thread to X-mods?

Ask the moderators via PM
I think DFI isn't worth the efforts. It's possible but might require too much BIOS modding. Their Award BIOS doesn't like unsupported CPUs.
Keny,

how to get a prescott to run on a tpower i45

Where does POST stop?

[Keny]

Keny,
Where does POST stop?

I will get back to you with the post code when I get the board back out and running up. Probably a day or two before I get time toes with it.

[Keny]

Finally got time to mess with this and the post goes nowhere, it stays on FF and doesn't move through the codes at all

[wytiwx]

Finally got time to mess with this and the post goes nowhere, it stays on FF and doesn't move through the codes at all

If you want prescott on Biostar I45, I think VID mod first.

[wytiwx]

Celeron D can post on DFI LP UT ICFX3200-T2R, but failed to OC FSB 800. With FSB mod, get no problem.

Mod way: FSB 800 mod
Mobo: DFI LP UT ICFX3200-T2R
Cooling: air
Ambient temp: 21C




Valid URL: http://valid.canardpc.com/show_oc.php?id=2728973

[Keny]

If you want prescott on Biostar I45, I think VID mod first.

Is the VID mod on prescott the same as the VID mod on the celeron D, like below?

[wytiwx]

Is the VID mod on prescott the same as the VID mod on the celeron D, like below?

before VID mod, you get to know your prescott VID (VRD 10 or 9).

[Keny]

before VID mod, you get to know your prescott VID (VRD 10 or 9).

How do i do that ?

[wytiwx]

How do i do that ?

A easy way is to post on a Gigabyte P965 or P35 mobo, you can see VID in Vcore setting page. Or you have to measure voltage of 8 pins below after post on I45 (edited from ceemic's photo):

[Keny]

I can run the Prescott on a old 775 board and get the vcore from CPUz if that's any easier, or does it need to be measured from them pins, I presume I just measure each pin to GND

Edit: I don't have a P35

[Don_Dan]

THX, man, you're right. Please tell me how to move this thread to X-mods?

I'll move it to the Mods section if you want.

[paulbagz]

Love this thread to bits!

-PB

[wytiwx]

I can run the Prescott on a old 775 board and get the vcore from CPUz if that's any easier, or does it need to be measured from them pins, I presume I just measure each pin to GND

Edit: I don't have a P35

Vcore from CPU-Z is not so accurate, for example VID 1.2500V and 1.2625V can be showed as the same 1.235V.

Now the way is to measure these 8 pins voltage to GND. About 0.3V means "0", about 1.2V means "1".

[wytiwx]

I'll move it to the Mods section if you want.

Yes, my friend. Thanks for helping

[Keny]

Vcore from CPU-Z is not so accurate, for example VID 1.2500V and 1.2625V can be showed as the same 1.235V.

Now the way is to measure these 8 pins voltage to GND. About 0.3V means "0", about 1.2V means "1".

Ok measured them out and the results are below, thanks for the help on this BTW.

[wytiwx]

Ok measured them out and the results are below, thanks for the help on this BTW.

As your test result, VID [7:0] should be 01110011, Vcore in VRD 10.1 should be 1.3750V, but in VRD 11 this VID code is weird.

What is your Prescott CPU? Is Vcore on old 775 mobo ~1.35V ?

[Keny]

On the old board (some generic msi thing) this pentium 4 540 and the stock vcore is 1.22, it goes up to 1.3* under load, damn p.o.s board fluctuates all over constantly but it settles @ 1.22 on idle

Just to confirm, as per the pin# in the diagram i'm getting 11001110 on the i45

[Keny]

Do you think the same vid mod that you done on the cele will work on this p4?

[wytiwx]

Do you think the same vid mod that you done on the cele will work on this p4?

P4 540's VID works with VRD 10.1, the same as Celeron D, so I think it should work if VID code is correct.

[Keny]

P4 540's VID works with VRD 10.1, the same as Celeron D, so I think it should work if VID code is correct.

Worked perfect



I would thank, but i dont know how to do it on this forum :/

[wytiwx]

Worked perfect

I would thank, but i dont know how to do it on this forum :/

Congrats.

I don't know how to thank someone, too.

[wytiwx]

CPU: Celeron D 347 (batch 3709A270, FSB 800 mod)
Mobo: DFI LP UT ICFX3200-T2R (Vcore mod)
Cooling: LN2
Valid Vcore: 2.00V

Why did I do FSB mod? Because CPU failed to get 800 FSB on air without mod.

Why did I do mobo Vcore mod? Because Vcore 1.90V limit (including Vdroop) without mod.








Valid URL: http://valid.canardpc.com/show_oc.php?id=2732437

[Keny]

Nice results there.

Is there a mod to get the CPU multiplier unlocked as I have got no adjustments at all on my CPU ratio after doing the vid pin mod on the p4 540, it overclocks ok but its limiting as the CPU ratio can't be lowered once the clock reaches a too high speed for the ram devider to cope with

As you can see its greyed out with some sort of error message

[wytiwx]

Nice results there.

Is there a mod to get the CPU multiplier unlocked as I have got no adjustments at all on my CPU ratio after doing the vid pin mod on the p4 540, it overclocks ok but its limiting as the CPU ratio can't be lowered once the clock reaches a too high speed for the ram devider to cope with

As you can see its greyed out with some sort of error message

I45 mobo can't change P4 CPU ratio natively, it has no matter with VID mod.

By my testing, Gigabyte P965/P35 mobo can change P4 CPU ratio, ASUS P965/P35/P45/X48 can't do that.

[Keny]

Ok thanks, no biggie, its just nice to be able to adjust it for spi runs etc, where ram efficiency is key. Glad I don't need a different board to run these old cpu's as I only have this one 775 board that's any good at overclocking.