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Overclocking P4  

post #1 of 6
Thread Starter 
Hi,

I am trying to overclock an old rig. I have an Intel Pentium 4 3.4ghz Prescott 90nm which runs at 1.4v. This processor doesnt let me gain access to the multiplier and I have been trying to overclock using the FSB. In my BIOS my FSB is default to 200Mhz so I am assuming I have an 800FSB processor. My motherboard is a P5AD2-E Premium which I read is good for overclocking. It has a 925XE chipset which supports up to 1066 Mhz.

I updated my DDR2 ram recently to 2*1 gb which is the following:

http://www.crucial.com/store/partspe...2KIT12864AA80A

My old ram was the same brand but 2*512mb which ran at 1.9v. I removed the old ram and put the new. When I overclocked with the old RAM my latency timings were in the region of 3-3-3-8 but the stock timings were 4-4-4-12, which is the same as my new ram. However my new RAM is 800mhz and runs at 2v. My motherboard supports 533mhz but can be overclocked to 711mhz.

I am new with overclocking and I cannot seem to get low latencys as 3-3-3-8 with the new ram and I am wondering if anyone can help me with this? There is a overclocking profile in the BIOS which says 888FBS/DDR2-677. When I set this my processor overclocks to 3.781.85mhz but my RAM can support up to 800 so it is actually underclocking right. My latencys go to 5-5-5-15 with this setting (DRAM-Freq 222.5 Mhz) and this is a 1:1 ratio which I think is good? Any help appreciated!!! I am assuming lower latencies are what i need to aim for but I do not know to be honest. If not maybe I should combine my old ram with my new to make 3gb. Everything is set to auto in my BIOS for voltages etc

Cheers,

G
Edited by LordNubus - 1/2/09 at 10:42pm
post #2 of 6
4-4-4-12 is probley the lowest the RAM will go, from what i know if you put 2 sticks of 800mhz ram and 2 sticks of 533 mhz ram in they will all run at 533mhz.
Is there a RAM multiplier on that board?
post #3 of 6
Thread Starter 
Thanks for the reply. I cannot find a RAM multiplier. Maybe I'm not understanding. You may have a look at the following:

http://www.hardocp.com/article.html?art=NzAx
http://www.overclockers.com.au/artic...?id=340589&P=3

The first link shows pictures of the BIOS on page 3 or so maybe you can see something I can test out. Thanks!
This link may have nicer pictures
http://www.digital-daily.com/motherb...ium/index4.htm

I have tried overclocking using ai-booster software but it wont show a "RAM multiplier" and i cant find one in the bios, and also will not allow me to manipulate the the CPU multiplier value its greyed out.

What I have done now is manually set the clock timings to 4-4-4-12 in the bios and overclocked the FSB by 5%. the PC boots but I am not sure how to determine if this is good or not . It is a 3:4 ratio where if i do the same without manually setting 4-4-4-12 i get 1:1 5-5-5-12 timings. Temperature remains at 40 degrees but goes up to 75 when under load. 75 is what it was up to without clocking at all (letting the PC decide). However I am still letting the PC decide about voltages etc because I am not confident enough to change these settings. I dont know what is good to start with etc.

I was testing the overclocking capability and i managed to put the FBS up to 4.20ghz and my pc crashed when i tried to drag a window lol.

I have read that if i put the 533 mhz and 800mhz it will run at 533 but without the new ram i was getting latency of 3-3-3-8 or very slightly under maybe 3-2-3-8 cant remember. I am not sure which combination of ram and what latency etc will make an impact game-wise.

Thank you everyone!
Edited by LordNubus - 1/3/09 at 2:06pm
post #4 of 6
Thread Starter 
Ok Ive been playing around with the cpu and ram.

My CPU is 800 FSB so on auto the bus is 200mhz. With my new ram inserted and also set to auto. CPU-Z program tells me that my ram frequency is 267.6Mhz. This is a 3:4 ratio. and the clocks are 4-4-4-12.

My question is which is better. Higher speed in RAM but Higher latency or lower Speed ram but lower latency?
post #5 of 6
http://www.cyb3rglitch.com/tutorials/Overclock-CPUs-RAM/ Learn how to overclock here and after overclocking in bios you can get a software and overclock in windows for more speed
post #6 of 6
Quote:
Originally Posted by Yamato Sama View Post

http://www.cyb3rglitch.com/tutorials/Overclock-CPUs-RAM/ Learn how to overclock here and after overclocking in bios you can get a software and overclock in windows for more speed

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