C2D E6420 expected overclock.

plasmahal · 14 Aug 2007 at 12:46

With the kit i have in my sig, what would be a reasonable overclock to expect ?

I was assuming that 3.2 would be acheivable on air.

Also, should i be looking at say fsb of 400 X 8 on the multiplier ?

Would appreciate input from other's with similar kit to mine.

Cheers.

Biffa · 14 Aug 2007 at 12:53

dual post

Biffa · 14 Aug 2007 at 12:53

3.2 easy on air. 400Mhz on the FSB would be ideal for the RAM you have.

plasmahal · 14 Aug 2007 at 12:56

so it would be best to keep the fsb at 400 and just up the multiplier ?

Chris Beard · 14 Aug 2007 at 13:07

fsb won't start at 400 from stock. 3.2 is quite a nice overclock but it may be possible to go higher.

the multipliers are locked so you can't go up, only down except on the really high end chips.

plasmahal · 14 Aug 2007 at 13:10

So what's the highest multiplier on this chip ?

So if i push the FSB up, then the memory will the ultimate limiting factor........ I assume.

Biffa · 14 Aug 2007 at 14:07

Top multi on the 6420 is 8 which is the default multi, as someone else said you can clock the multi down but not up.

You will need to run the memory on a divider, you want it as close to 800Mhz as possible. Some memory you may be able to run at a higher speed than its rated at but you will probably need to up the voltage on the RAM.

Try it in small increments, get it into windows at the fastest speed you can and once you have reached maximum you can start to tweak it and test it with Orthos.

plasmahal · 14 Aug 2007 at 14:27

Is the divider in the bios is the option that goes up in .5 increments, e.g, 2.0, 2.5, 3.0 etc ?

Biffa · 14 Aug 2007 at 14:35

Looking at this screenshot

I'd say you are right, its marked System Memory Multiplier, and when you set it it will tell you what the memory is relative to the bus speed.

For 6400 memory you want to try and keep it as close to 800Mhz as possible

plasmahal · 14 Aug 2007 at 15:23

cheers biffa, thats the setting i was wondering about.