My 5.1GHz only gave 7.2sec in superPi but the improvement in CinemaBench for example is significant from stock to 4.8GHz.
Level 1 LLC for 4.8GHz @ 1.38V more likely will be Level 5 to get pass the post
I am going to order this board next monday http://www.overclockers.co.uk/showproduct.php?prodid=MB-051-AK and get rid of my crappy z68x ud4 b3 (not a very good board) and will order a new i7 2600K retail too. I brought mine i7 2600K oem from the shop (big mistake as it probably very poor chip as well) unstable at 4GHz even left everything on auto default on the bios. Not very happy.
Paradisiac, the thing you couldn't find and I couldn't remember is the Turbo Power limit.
Leave it at manual and change short and long power to 200W. (people even set it at the excess of 250W).
If you get a BSOD than bumb the Vcore another step (just a fraction).
Test for stable max Turbo with Super Pi not Prime.
Oh, and if you are hitting 75C temps, clock it down and get a better CPU and thermal paste. You really do not want to be as high as this.
is there any way to test prime stable? there must be a way to disable this turbo thing, because if you do the auto OC it runs at full speed in prime.
Check that after modifying power limits, usually there is not enough power hence the cpu clocks down
Using youtube last night I found a really good video specific to the Asrock boards for overclocking, was for the P67 as opposed to Z68 but same bios options.
One thing you need to change is the power limit. I noticed at first on my 4.6ghz it keep moving around. But when you up the long duration power limit from 95W to 200W and short to 230W it stays bang on 4.6ghz when not idling.
Also use level 4/5 for load line calibration.
Using these methods + offset voltage along with the "normal" options I managed to get 4.6ghz at 1.26 volts so it runs really coolI am quite lucky with my CPU again it seems, my Q6600 Go did 3.6ghz on stock volts.
Just buy the board first and run some tests on the new board. And if you are then not happy, get a new chip. You never know it might have been the board holding you back, and it might save you some money.
Thanks will do but before buying a new board, Can you tell me what is your correct setting for 4.60GHz for vcore, dram, qpi/vtt, which level on LLC, do I need to set both '200' on Turbo Power Limit (Watts) and Core Current Limit (Amps) or leave it on Auto ? As you had the same board as mine Z68X UD4 B3 and what bios version do you have ? Mine is F7.
Thanks.
Running the F7 bios also myself and my settings are as follows...
Vcore 1.35v
Dram 1.55v
VTT 1.1v
PLL 1.8v
LLC 6
I've not touched the turbo power limit or the core current limit, so I guess both are on auto, but I will check for you.