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Overclocking 3570K to 5Ghz, on AIR.

Arkaridge

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#1
Hi guys,

I recently got myself a i5 3570K for my new rig. Apparently I got myself a good chip, since I was able to reach 4.5Ghz @ 1.12v (stable after 13 hours of Prime). I'm not too experienced with overclocking, but i learn fast. I later managed to reach 4.7, 4.8 and then 4.9Ghz @ 1.35v (max temp 84c). I'm currently trying to reach a stable 5Ghz. I can boot up and navigate around desktop fine, but as soon as I run prime or IBT, the program will 'not respond'.

I was hoping for some tips on achieving stability without increasing VCore too much more.

Currently, 5Ghz @ 1.38v

50 x 100
Spread Spectrum - Disabled
SpeedStep - Disabled
Turbo boost - Enabled
Additional Turbo Voltage - Enabled
PLL overvoltage - Enabled

Power Saving Mode - Disabled
Offset + 0.285
LLC - Level 5 (highest)
VTT - 1.085v
PLL - 1.824v

Here's my 5Ghz CPU-Z validation, http://valid.canardpc.com/show_oc.php?id=2448503

My setup,

CPU: i5 3570K
Cooler: NZXT Havik 140
Mobo: Asrock Z77 Extreme 4
RAM: Corsair Vengence LP 8GB 1600mhz
GPU: 1G Gigabyte GTX460
PSU: Antec HCG-620 M
Case: Antec Three Hundered Two (Modded, currently with only 1 top mounted case fan)

I haven't really changed VTT, PLL or any of the C States. I'm thinking of disabling C3 and C6, will this improve stability?

5Ghz seems soo close. Any advice would be greatly appreciated! =O
 

OneMoar

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#2
you need to get the temps down below 70c if you want 5Ghz
not all chips will do 5Ghz and the 3750ks don't clock as well as say a 2500k
and you are gonna need at least 1.40v to get to 5 by the voltage curve you listed more vtt would't hurt either but keep it under 1.9 same for pll
pll beyond 1.89v = fried
 
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#3
Here is my i7-3770 not any where close to 5GHz but I'm happy with it running with the rated turbo speeds 3.9GHz for 1 or 2 Cores, 3.8GHz for 3 Cores & 3.7GHz for 4 Cores

I know it can easily run up to 4.3GHz tho its a non K chip, i had a glitch in the previous bios that had it running at 4.3GHz till i updated to the recent bios that fixed the glitch.

http://valid.canardpc.com/show_oc.php?id=2449325
 

Arkaridge

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#4
you need to get the temps down below 70c if you want 5Ghz
not all chips will do 5Ghz and the 3750ks don't clock as well as say a 2500k
and you are gonna need at least 1.40v to get to 5 by the voltage curve you listed more vtt would't hurt either but keep it under 1.9 same for pll
pll beyond 1.89v = fried
Thanks for the advice. I'll add some extra in-take fans on my case, hopefully it'll help 3-4 degrees. Do you have a recommendation for a limit on VTT?

I'm still not sure about disabling C-states and maybe trying to increase BCLK rather than multiplier for the last .1Ghz.
 
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#5
You need CPU cooler not case coolers.
Corsair H60 will be nice it will keep temp to 65C