High Fsb Vs Low Multiplier

[bobby34]

Hi all,

 

I am wondering what is the best overclock setting for my XP2500+

 

I recently installed a Volcano 7+ and for the moment i am running stable at 195 mhz x 10.5 at 39 degres after one hour of prime95.

 

My question about the overclock, since am still a beginner, is this:

 

Should the FSB stays that high and continue to raise the multilier or lower down the FSB a bit before ? What will raise more the cpu temp at this point, the multiplier or the high FSB ? Does the XP2500+ can support high FSB close to 200 ?

 

I overclocked my system very gradually with high FSB first, very low multi and slowly up the multi.

 

Some people here seems to have lower FSB and higher multi. What is better in performance, lower fsb higher multi or high fsb and lower multi ?

 

I have no issue with the memory since am using DDR433 Hyper X 2x512. My Mobo is Soltek 75FR2N-L, Nforce 2 chipset

 

How do you know when it is preferable to higher the voltage ?

 

So many questions i know... you probably repeat those things over and over. Thanks for your inputs.

 

Regards,

Bob

[Guest Trios]

Hi all,

 

I am wondering what is the best overclock setting for my XP2500+

 

I recently installed a Volcano 7+ and for the moment i am running stable at 195 mhz x 10.5 at 39 degres after one hour of prime95.

 

My question about the overclock, since am still a beginner, is this:

 

Should the FSB stays that high and continue to raise the multilier or lower down the FSB a bit before ? What will raise more the cpu temp at this point, the multiplier or the high FSB ? Does the XP2500+ can support high FSB close to 200 ?

 

I overclocked my system very gradually with high FSB first, very low multi and slowly up the multi.

 

Some people here seems to have lower FSB and higher multi. What is better in performance, lower fsb higher multi or high fsb and lower multi ?

 

I have no issue with the memory since am using DDR433 Hyper X 2x512. My Mobo is Soltek 75FR2N-L, Nforce 2 chipset

 

How do you know when it is preferable to higher the voltage ?

 

So many questions i know... you probably repeat those things over and over. Thanks for your inputs.

 

Regards,

Bob

Most 2500+'s can take 200 FSB with a slight voltage boost. It is MUCH better to have a high FSB and a low multi, since the FSB is the biggest bottleneck on a computer other than the hard drive. The faster you get your FSB, the better.

 

Also, your temps seem pretty good for that HSF. Raising the FSB OR the multiplier will both increase your temps (slightly), so either way is fine. The thing that really makes your temps go up is if you up your voltage.

 

Hope this helps.

 

Trios

[Will Smith]

since you have DDR 433 (216-217) memory I would try to get your FSB up to 216 or 217 as a start. thus giving u sync'ed memory and cpu bus speeds. Then if you can hit 216 or 217 then start to raise your multiplier. try to keep you fsb and mem speed the same. I prolly would have gone PC3200 on that system but 433 is fine too. need anything else just ask.

[bobby34]

Hi again,

 

I increased the FBS slightly again, to 198 x 10.5, not much i know, but i feel it's best to overclock gradually.

 

I am still running very stable doing stress test at 39 degres. When will i feel the need to increase voltage ? Will i get better cpu benchmark performance ?

 

I just don't feel the need to increase voltage so far.

 

Thanks,

 

Bob

[Will Smith]

the main way to tell that you need to increase your vcore is when:

 

1. computer doesn't even POST

2. During the bott process it hangs

3. anytime your system is in windows and running programs makes it freeze or reboot

 

When increasing your voltage you will see a temp change. sometimes its nothing and sometimes its a couple deg. you wont be seeing better cpu performance till after u reach standard 2500+ speeds. keep lowering your multi ti try to get to 216 or 217 then raise your multi. You want to take full advantage of your memory.

[bobby34]

Here is where i went so far, overclocking my system.

 

Right now am running stable 200x10.5 at default volt core at 39C load

 

I upped the multi by another .5 and the system did not post. Then i upped the cpu core volt a gradually to 1.7 and XP booted normally but failed (system rebooted) right at the beginning of PRIME95 test.

 

I upped the voltage up to 1.75 and i was running fine at 42C until PRIME enter the second series of tests where i received errors : ILLEGAL SUMOUT and PRIME aborted.

 

My cpu temp raised only 3 degres with those new settings and seemed to be running more stable until the prime error.

 

What should i do next ? Did i reached the maximum from my 2500+ ? I am not very confortable upping my FSB. Since the MOBO is 400 FSB, is there any risks upping the FSB to more than 200 ?

 

Thanks,

 

Bob

Edited November 3, 2003 by bobby34

[Guest Trios]

Go ahead and lower the multi again and up your FSB to 210-215 or higher. Your board can take it. You can tell if your motherboard overclock is getting a little too high by popping sounds on your onboard sound (though a south bridge cooler will ussually alleviate this). If this happens, either thermal epoxy a heat sink to the south bridge or lower your FSB 2-3 MHz.

 

Trios