IMO the reason why 457(FSB) x 7(Multi) performs better than 320(FSB) x 10(Multi) is because that the FSB x 2 = ram speed (under 1:1 memory divider) so 457 x 2 = 914mhz ram speed and 320 x 2 = 640mhz of ram speed only.

There is such case that you can apply a higher memory divider to get a high ram speed as well. eg: 320(FSB) x 10(Multi) using 2:3 memory divider then your ram speed would be 960mhz. If such a case then 320 x 10 (using 2:3 memory divider) will be faster than 457 x 7 (using 1:1 memory divider).

1 thing to bear in mind is that is your ram able to hit that kind of memory speed and the ram timing will make a slight performance different as well eg: DDR 914 using 4-4-4-11 vs DDR 960 using 5-5-5-15.

In Intel Core 2 overclocking you might wanna take note of the strap changes when hitting higher FSB, this is quite subjective as it depends mostly on the mobo itself. some mobo strap change happens under higher FSB than the other one. When strap changes there is slight affect in performance as well.

Sorry i m bad at explaination.... Hope I didnt confuse you more and more

This post has been edited by sup3rfly: Aug 6 2007, 03:53 AM

well ram freq is directly affected by the FSB....and the lowest divider you can use is 1:1, you should leave it as 1:1

Lets say we set the FSB as 350

1:1 ram speed = DDR700

2:3 ram speed = DDR1050

4:5 ram speed = DDR875

AFAIK the lowest divider we have on C2D era is only 1:1, you can only up your ram speed but cant lower it down, if i m not mistaken you can lower it down if you are using 1333 fsb processor (E6x50) series, if you are using 1066 fsb processor (E6x00) then I dont think you can actually lower it. I dont have much info on that as i m still using 1066 proc + p965 chip mobo

This post has been edited by sup3rfly: Aug 6 2007, 03:04 PM