Tricks to make 5Ghz...?

[Bartman39]

SB 2600K w/Corsair H70
MSI P67A-GD53
2X2OCZ DDR3 PC1600 (ultra low voltage 1.35V)
2-6950HD`s (unlocked)
1-TB Samsung HD103SJ
LG 10X blueray burner
ASUS DVDRW burner
Thermaltake Blackwidow TR2 RX 850watt PS
Cooler Master Storm Sniper



Worked it to 4.8Ghz with 1.38 volts and pushed it to 1.40 to try for 5.0Ghz but crashed just as windows got to the desktop... Did boot into windows at 4.9Ghz but was of course not stable but would run most anything except prime95 which crashed super fast...:'( BTW have not seen temps over 70-71C and the only reason they made it that high was I had set the fans on the H70 to only 50% in the bios... Most of the time they dont get over 62-64C and thats with the 200mm fans on the lowest setting they will go (love that case)...

Just not sure of some of the other voltages and would like to hear more of what helps with stability with these chips... Quite different from the earlier I7`s but like these alot more...

Any help or info would be greatly appreciated

 

[Thor86]

Unless you are very lucky, you will never get 5GHz with under 1.45 vcore. Overclocking is all luck of the draw.

Most Sandy Bridge I7s will generally hit 4.4-4.6Ghz at around 1.375-1.4 vcore for 24/7 stability, which is still great.

 

[mnewsham]

You can try a more exotic cooling solution and a better motherboard.

 

[C1]

Get a brick of dry ice (most food stores carry it via special containers) and put it in the case to cool down the whole system. A brick of dry ice should last a whole day and together with the proper voltage increase you should be able to make 5Ghz (at least just say that you did).

 

[Acanthus]

Your temps are high for watercooling.

 

[Zap]

I think for higher GHz the Sandy Bridge chips need higher voltage, which may or may not be detrimental to the lifespan of the CPU.

 

[smakme7757]

I can't get 5Ghz before going to 1.49v and then i need 1.51v to have it stable. Just try with more Vcore.

Also your temps are pretty high. I get 70c when i'm at 5.5Ghz ith 1.58v

 

[Bartman39]

Well got brave and still here but think I`m happy with 4.5Ghz and 1.25 volts... I did try 1.45 and did make it to windows at 5.0Ghz but was not stable and dont want to try to stabilize it with more volts...

I dont think a better motherboard is needed either and might only be worth just a slight better OC this board is working extremely good for only being $150... As for temps still did not get over 65C with the fans on the H70 set properly and it had been running prime for a while so the temps settled in... Bear in mind this is a brand new build and havent even really heat set the thermal compound so should get slightly better temps with a little burn in time...?


Thanks to those that replied but think I`ll stay on the conservative side for now...:thumbsup:

 

[paperwastage]

4.8 @ 1.38v is pretty decent

but the thing is, if you want 5ghz, you need more voltage. under 1.45v for 5ghz is considered a good chip

 

[LiuKangBakinPie]

Set your ratio to 45 then up the vcore by 0.025 at a time till its stable in prime. When its stable. Then raise the ratio again. 50 for 5Ghz. Then vcore 0.025 at a time

Leave the pll override off till you reach 1.4v. If you reach 1.4v then switch it to enabled.