overclocking i7 3930k

Steven Rezeki

Honorable
Apr 6, 2013
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10,510
Hi, I want to overclock my PC
but first of all, i have no idea on what to do
I've read some forums and the results other people are getting

So here's my rig

CPU: intel core i7 3930k
graphic cards: evga nvidia gtx 680 2gb
mother board: asus sabertooth x79
RAM: mushkin 8gbx4
Cooler: corsair h100
OS: windows 8 64bit

i bought all this on ncix and asked them to build it up for me


tbh, i bought this pc earlier this year and i didnt used it much
ive been away for the last 4 months so it hasnt been used at all
now that im back, im gonna use it alot and i want to overclock it to a decent spec
ive read that it can run stable(i dont know how u define stable for this) at 4.2 easily with corsair h100(what im using)
but again, i dont know what to do with the bios
i dont even know how to get into the bios page

i've also read something about CPU multiplier or something like that and i also have no idea on what's this about or how to tweak about with this
does overclocking your PC require you to overclock your GPU too ?

Please do help me with this
 
Solution
You will not be able to run that well at 4.2 using a Corsair H100, trust me. I had a hard time running my 3960x at 4.0 using an H100. I'm currently running it at 4.5 using a custom Swiftech loop


There's a bunch of good guides on the Asus RoG forums under the Rampage sub-forum. I know that Sabertooth is not RoG branded by the same principles apply.

Summary: overclock by boosting the maximum turbo multiplier. Give your CPU a little bit more voltage if need be, but 4.0 is only a smidgen above the 3.8 that the 3930k hits anyway.
 


Beginning with the Nehalem microarchitecture in 2009, Intel introduced TurboBoost. This allows a processor to overclock one or all of its cores up to a certain amount provided that it stays within its TDP. The 3930k and 3960x have bin levels of 3/3/4/5/6/6 which means that when boosting 6,5,4,3,2, or 1 core(s), each of the boosted cores will have their clock multiplier increased by that bin amount. If the base clock is kept at 100Mhz, all 6 cores can be overclocked by 3 * 100 = 300Mhz provided it stays within the 130 watt TDP. One core can be increased by 600Mhz.

Asus enthusiast motherboards (Rampage series, possibly including Sabertooth) ignore this by default and simply run all cores at the highest bin, turning 3/3/4/5/6/6 into 6/6/6/6/6/6. They also ignore the TDP by default and throttle only by temperature. On Asus enthusiast motherboards, this effectively turns a 3.2Ghz 3930k into a 3.8Ghz 3930k for all intents and purposes. It also turns a 130 watt CPU into a 200 watt CPU. The best way to overclock SB-E chips on Asus motherboards is to simply increase the top turbo multiplier (default 38 for 3930K) to something higher, such as 40.