Overclocking Pentium 4-2.26GHz Processors

[Ashlin]

Hello Friends,

I'm having a Pentium 4 with 2.26Ghz processor. I have American trend G845 series motherboard with a support of 1 Gb Transcend Ram on it. It's a Dell system which has 300 W PSU and its about two to three year old machine. Now i would like to know that is it possible for me to overclock my machine? Is it possible for me to do so? If yes, how can i do it? Can any body provide me the correct logical steps for the above issue? Any kind of help would be appreciated.

Thanks in advance.

[Hockson]

Look at your motherboard manually to check out if any jumper settings it has. If it is jumperless and there is no way to change the multiplier or clock in the bios then you can't overclock it.

If there are jumper settings on your mobo then just play with them. If its at x3 take the multiplier to x3.5 use a gradual climb if your comp locks up or doesn't boot you know its not stable at that speed.

[.:MUNDITO:.]

Overclocking this board was very easy. We decided that since this board is made for overclocking that we would have to deviate from the air-cooled overclocking. We put the Prometeia on the Intel Pentium 4 2.26B (BO stepping). Raising the voltage to about 1.85V on the CPU and leaving the memory synchronous with the FSB, we were able to reach 196 FSB. This is a very good overclock considering our CPU was the limiting factor. It is too bad that we do not have an engineering sample to test with since the use of unlocked multipliers would greatly help.

Our overclock was very stable in terms of the board. Our temperatures were getting rough at this speed so the CPU was giving a few problems when we tried to go higher. Other than that, we were able to run some benchmarks and prime 95 for a while at 196 FSB, which is extreme. Using the 4:5 memory divisor allowed us to run memory at 490 MHz DDR using 2-7-3 -3 timings.

One minor hiccup that we encountered was that we were able to run the memory faster using the 4:5 divisor than we were using the 3:4 (yes you read that right, strange eh?). Hopefully this issue is just because the board is brand new and will be fixed in a future BIOS revision.

The board definitely has more in it and most people will not be able to hit a very high FSB due to CPU limitations. Support for 800 MHz FSB CPUs in the future is definitely present in the board. We can not say 100% that this is true but the options in the BIOS and board design look very good for the future 800 MHz FSB CPUs.

[Viceman]

The following processors satisfy these criteria:

• 1.60 GHz/ 400 MHz FSB,
• 1.70 GHz/ 400 MHz FSB,
• 2.13 GHz/ 533 MHz FSB,
• 2.26 GHz/ 533 MHz FSB.

We didn't even consider using a Pentium 4 clocked at 1.6 or 1.7 GHz because they most likely would have been unable to break the 3 GHz barrier, no matter how powerful the cooling might be. Anyway, models below 2 GHz are still mostly based on the old Williamette processor core, which is ill-suited for overclocking.

Before using the VapoChill, you have to cover the underside of the processor with thermal grease in order to prevent condensation from forming. The downside is obvious in the picture it's high on impossible to get this CPU clean again.

We conducted the tests with a standard Pentium 4 processor factory-clocked at 2.26 GHz and 533 MHz FSB. It was a perfect candidate because it has a 17x multiplier and can be overclocked to a great extent. That doesn't mean our project was easy, it wasn't until we tried out a second refrigerated processor that we managed to top 3 GHz.