IMO....unlocked multis take some of the "fun" out of overclocking for daily use....they don't force you to work at it the way a locked chip does.
 
No for extreme OCing, thats a different story

I'm wondering that also. Those of us on the P55 FTW/FTW 200 only have the option of 4.2 and 4.8 GT/s, not 6.4 like you put in your guide.

Sweetness. DDR3-1600 for the win.

You should disable VDroop when overclocking.  It just lowers VCore in windows.  Not sure about LLC, I don't even recall seeing such an option in my P55 FTW.  I'll have to look at it again.  

For us, the correct setting for LLC enabled is Vdroop Off.

Thanks Sleepee....I've been sleeping 

boredgunner

Okay, after digging up some info about QPI frequency, this is what I've come up with.  In the BIOS you have three options here - auto, 4.270 GT/s and 4.800 GT/s.  4.270 GT/s is a 16x multiplier while 4.800 GT/s is an 18x multiplier.  So to determine QPI speed, use this equation.

BCLK x QPI multiplier = QPI speed

QPI speed should be double the effective speed of your RAM.  Now let me plug in some numbers for an example.

200 MHz x 16 = 3200 MHz QPI speed

Perfect for me, since I have 1600 MHz RAM.

Wait what ? 
 
I'm on 200 MHz x 18 = 3600 MHz
I have 1600 MHz RAM too. QPI 4.270 GT/s
so this setup isn't good ?

dozer3000

then qpi is at 3200 MHz

 
Correct.  As I said:
 
4.270 GT/s = 16x multiplier
4.800 GT/s = 18x multiplier
 
200 MHz QPI x 16 = 3200 MHz
 
QPI speed should be double your effective RAM speed.  1600 MHz RAM x 2 = 3200 MHz.  Good settings.

impressive guide

So I should be able to successfully run my QPI at 4.8 GT/s?  That would be good news.

Hi I'm new to this overclocking thing.  I have to say this is the most comprehensive guide I have came across.  I have searched for over two weeks to find something to give me a clue on how to get my rig to at least 4ghz.  After reading your guide about a zillion times , pulling my hair, and banging my head against the desk because I could not get my temps under control at stock settings. I had everything dialed in correctly but with the slightest OC, my 760 would say, "WTH" 70C right off the back.  Thinking my H50 was sitting tight enuff, then I applied a lil hand pressure to the cooler and something amazing happened, the harder i pressed the more the temp dropped.  I was really scarred to turn the screws more, but there is not real way to tell if your cooler is seated properly other turning each screw in a figure "x" pattern till the temps no longer drops. Now, I can follow your guide with confidence.  So far idle is averaging 35c across, and loaded is about 58c.  I'm taking those baby steps to get the most out of my rig.  I guess this a  very long winded way of me saying thanks for your expertise, it really help me to cut out all the B.S. and guesswork.    I see 4ghz just over the horizon.

Your guide was helpful that I feel like I owe you money!

Love the guide, helped me finally figure out where the problem was with my random instability with just a mild 150blck with turbo/speedstep on OC.  Planning on using it next to see what I can push to for a higher OC for folding use.