Performance difference with different multiplyers?

[willhub]

Hi.

Currently running at 8X Multi with 425Mhz FSB with my ram at 850Mhz so I guess thats 1:1.

Would the performance be any different, maybe lower or higher if I ran with a 9x multi so the FSB would be running at a lower clock?

 

[willhub]

So better off leaving it alone unless I can clock higher?

Also my ram is at 850Mhz 4-4-4-12, would 1000Mhz 5-5-5-15 be faster?

 

[willhub]

Is the Memtest in windows good for checking stability?