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I5 3570-k high O.C. ? RAM dilema

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October 19, 2012 7:00:43 AM

Hello guys so i wanna do some O.C. whit my PC .
Asus P8Z77 M-Pro + i5 3570-k + Corsair h-100 + Ram whit 1333 MHz.
so my problem is when i wanna O.C. 4,6 GHz or more the CPU is not stabile in Prime 95 . a friend thell me that i have *** ram and i need some rly good ram like a Corsair Dominator Platinum or something what have morhe then 2133 MHz .

but im not a expert in RAM . so what is the tiffenernce between this RAMS ?
Corsair 8GB KIT DDR3 2133MHz CL11 Red Vengeance PC3-17000, CL11-11-11-27 1.5V
Corsair 8GB KIT DDR3 2133MHz CL9 Dominator Platinum PC3-17000, CL9-11-10-30 1.65V
Corsair 8GB KIT DDR3 2400MHz CL10 Black Vengeance PC3-19200, CL10-12-12-31 1.65V

so guys what is the diffenerce betwen this rams and what is the best for O.C. the CPU . my target is 4,8 GHz or more .

and one more thig . can my cheap MB handle more than 4,5GHz ?

THX GUYS .

More about : 3570 high ram dilema

a b à CPUs
October 19, 2012 7:23:11 AM

ram is completely seperate from overclocking now. you used to need good ram to overclock because it was all done with the front side bus, which was tied to both the cpu and the ram. so in order to raise the front side bus, the ram had to be able to handle it.

now, the front side bus remains the same and all overclocking is done with the multiplier, which only affects the cpu. your friend is mistaken. you probably just need more volts to the cpu. make sure you are under the max suggested volts and your heat is in check.

edit: yes that motherboard can handle a decent overclock, and out of all those ram kits you listed i could only suggest the first one as it runs at 1.5v which is what is suggested for the ivybridge chipset. 4.5ghz is getting into the upper range of what an ivybridge can be overclocked to btw. 4.8 is the absolute ceiling really.
a c 283 à CPUs
October 19, 2012 7:28:25 AM

The RAM isn't the problem.

CPU voltage is. Just add more voltage. The board has a relatively decent VRM section (6+2 phase), but it's still rather weak, too, and because of that, you'll need more voltage than average. You would fare better with a board like a P8Z77-V/Pro/Deluxe. Great VRM sections on those boards.

With that said, I think you should happy at 4.5. 4.5 on a 3570K is basically equal to 4.8 on a 2500K, so that's damn fast as it is.

Also, adding more voltage adds tons of heat to Ivy CPU's, so 4.8+ may just not be possible for you, even with a H100. A H100 is good, but it isn't the kind of cooling you need for extreme overclocks on a 3570K. That would require real water cooling.

You can try 4.8+ with a lot more voltage or stick with 4.5. Sticking with 4.5 gets my vote. No need for anything faster (it's just for bragging rights after that).
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