Overclock P4 1.8 on P4B266?

[royy77]

Hi All!

I'm new here and i would like to overclock my CPU P4 1.8.

Until now...i don't go over 110 FSB! Just i set 111 (e.g.) or more...system don't boot and hung-up.

My Specs are:
Pentium P4 1.8 Ghz - Willamette 478 (now @ 1.984 Ghz)
Mb ASUS P4b 266 (bios v1010)
2X1 GB Kingstone PC3200 CL3 184 DIMM (voltage 3.3)
HDD: 320 GB Western Digital IDE
Nvidia FX 5700 256 Mb

CPU temp: 45 C
MB temp: 35 C
CPU fan: 3350
Power fan: 2300
Chassis fan: 2400
+12V: 12.096
+5V: 4.999
+3.3V: 3.248
Vcore: 1.712



I'm wanting to OC my CPU with the stock cooler, to get the maximum performance out of my system.
I read that more people push cpu willamette 1.8 speed, up to 2.2 Ghz!
How is it possibile?
I must rise Vcore settings??
Thanks for answers

 

[redduc900]

The 110MHz FSB restriction is probably because of the increased 36.6MHz PCI frequency at that bus speed. Unless you have the option of locking the AGP/PCI at 66.6MHz/33.3MHz, chances are you won't be able to go any higher than 110MHz. What you could try, if your board has dip switches for setting the FSB/PCI, is select the 120MHz/30MHz (CPU/PCI) position; 120MHz x 18 = 2.2GHz.

 

[White_Pawn]

The 110MHz FSB restriction is probably because of the increased 36.6MHz PCI frequency at that bus speed. Unless you have the option of locking the AGP/PCI at 66.6MHz/33.3MHz, chances are you won't be able to go any higher than 110MHz.

i was just about to say this. I recently found a 478 prescott system and on my gigabyte board, you would have to set the 33/66/100 to manual and set it to that frequency.

 

[royy77]

The 110MHz FSB restriction is probably because of the increased 36.6MHz PCI frequency at that bus speed. Unless you have the option of locking the AGP/PCI at 66.6MHz/33.3MHz, chances are you won't be able to go any higher than 110MHz. What you could try, if your board has dip switches for setting the FSB/PCI, is select the 120MHz/30MHz (CPU/PCI) position; 120MHz x 18 = 2.2GHz.

Thanks for answer!!
I found dip switches in my mb..and now i'm trying to set them in that position!
I read in the manual that i can set them also in other 2 positions:

125/62/31 (125x18=2250) and
133/66/33 (125x18=2394)

Can I try also these 2 positions??Or is very dangerous for CPU...(thermal stress)?

Thanks again for answers

 

[royy77]

I try 125 fsb...bios ok...boot...but don't start operating system (windows 7).
WHY???

@ 120 fsb...Windows boot and start...but become unstable overall with a strange "direct x" and BSOD! Reboot and so on...

I left 111 fsb...everything ok!
There is a reason why don't start windows or become unstable?
Thanks in advance ;-)

 

[royy77]

Nothing reply?
Any solutions????
Please...Help!

 

[Bobnova]

CPUs will only run so fast, 120FSB is apparently just beyond your CPUs abilities at the stock voltage.
If you can feed a bit more voltage it may go faster, though you'll need to keep an eye or two on the temps.

 

[royy77]

CPUs will only run so fast, 120FSB is apparently just beyond your CPUs abilities at the stock voltage.
If you can feed a bit more voltage it may go faster, though you'll need to keep an eye or two on the temps.

ok...i'll try vcore manual setting..!
Thanks for answer ;-)

 

[theflyingrat]

The Willamette isn't liable to get much over 2.1GHz to begin with. Even the cache-crippled Celerons of this generation, which tended to overclock a bit better than the full-boat Pentium 4s, wouldn't do over 2.2 in most circumstances.