I845D - What is it's top stable fsb?

[Trader05]

I have a p4b266c and was thinking of getting a 2.4b and overclocking to 3.0ghz, just wondering if i can reach that fsb with my current board, i know that it doesn't support it, but i'm running 150mhz bus now. Is it worth the upgrade from a 1.6@2.4 to a 2.4@3?

 

[thermite88]

Let us know how it turns out for you.

I am using an ASUS P4B266 running a 1.6A at 170 FSB. I use 2 sticks of PC2700 with agressive timing. The system is rock stable. I am thinking upgrading the motherboard to something that supports Dual DDR, but worry that I may have to reduce FSB and end up having less performance.

One option is to get a 2.4A upgrade at the same time if it can be OC'ed as well as the 1.6A.

 

[dbwillis]

The 2.4A wont overclock as well as the 2.4B..the A is 24x100fsb....24x166fsb would be 3984mhz...one heck of an OC...

 

[thermite88]

The 2.4A wont overclock as well as the 2.4B..the A is 24x100fsb....24x166fsb would be 3984mhz...one heck of an OC...

I don't necessarily agree. If I can push the 2.4A to 130FSB, it will be 3.12GHz already and better than 2.4B at 170FSB or 3.06GHz. I am not sure that you have a better chance running 2.4B at 170FSB than 2.4A at 130FSB.

Also, you can buy the 1.8A processor which has the same multiplier, 18, as the 2.4B and is cheaper.

The bottom line question is: which CPU, 1.8A, 2.4A and 2.4B allows the highest frequency=multiplier x FSB(OC).

 

[THUGSROOK]

its a fact ~ fsb is more important then mhz.

besides @ 130fsb that 3.12ghz will be severely choaked

 

[Tom]

If they are the same stepping the 2.4a or 2.4b ought to have the same chance of overclocking to a given cpu speed. At the same cpu speed the higher FSB increases performance so the 2.4b has a performance edge if your other components work properly at high FSB.

It might be easier to overclock the 2.4a to 3 gig, if your motherboard won't work right at 170FSB.

 

[thermite88]

its a fact ~ fsb is more important then mhz.

Not sure about that. If everything else are equal, a higher FSB wins. But.........

I have the 1.6A running happily at 170FSB. I don't see the 2.4B to be much an upgrade even if it runs at 18x170FSB.

I am asking a question and not drawing a conclusion. If I can get a 2.4A at 130-140FSB, is it a worthwhile upgrade from the 1.6A running at 170FSB.