Difference in overclocking c2d and i7

no_1_dave · 2 Jun 2009 at 13:55

Have my new i7 stuff arriving tomorrow which I plan to clock to 4ghz.
I have read that the ram is no longer attached to fsb speed now etc...
How much difference is there between ocing my current rig and ocing the i7?
Is there much to do differently? Anything I need to be aware of, need to turn on or off etc? Have ordered the UD5.

user1453 · 2 Jun 2009 at 14:08

The basic princible is the same, raiding the bclk/fsb

Only difference with i7 is there is more multiplers/voltages to mess about with

As for memory you don't notice much difference once the mem speed is above 1333 due to the huge bandwidth the triple channel config allows

Also the i7 has intel turbo boost which ups the multiplyer under load, I turned that off because I wanted 200bclk and 4ghz, I will turn it back on when I want to go for 4.2ghz

FaceplantSi · 2 Jun 2009 at 14:09

Biggest difference is that what used to be FSB is now BCLK (base clock) and this is still linked to RAM speed by a multiplier. I have the same mobo as you are getting and tbh they are pretty easy to OC, have a look at my thread here for some more info. There's loads of people now getting that board so support is aplenty!

no_1_dave · 2 Jun 2009 at 14:25

So if I set base clock to 200 with turbo off I will get 4. If I then turn turbo on it will up the multi under load and give me 4.2? Wouldn't turning turbo on make things unstable? Or would I need to check 4.2 is obtainable first?

FaceplantSi · 2 Jun 2009 at 14:33

Exactly that. When I did 20 x 200 to get 4GHz I found that my load temps went too high, hence in the end I set the 'Performance Enhance' in the mobo to Turbo mode - this forces the multi to run at x21 all the time, then using a lower BCLK (191) I could achieve a 4GHz OC with lower temps - wierd, but it works for me! There is also a memory multi which is in steps of 2, so 8, 10, 12 etc - mine is at 10 atm, so giving 10 x 191 = 1910MHz.