i5-3570k overclocking help required

philmo

philmo

philmo

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4 Apr 2012
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I am going to update my system next year when funds eventually allow, for now I need to look at short terms options of squeezing a little more out what I have for gaming (have just updated my GPU to a GTX1660 SUPER - mainly to move into the future new build).

I have an i5-3570k - running at stock speed 3.4 Ghz, it has a Cooler Master Hyper 612S Cooler.
My MB is z77-d3h (with the most recent (UEFI) BIOS update).

I really don't want to push this to a dangerous level but after reading various forum entries and looking at videos it has been suggested 4.2 should be possible without many other changes. The higher whilst being safe the better.

I am nervous as this is a completely new area to me and I am unfamiliar with changing voltages etc.

The most common method I have seen is by simply changing the CPU clock ration to 42 (which I understand will then cover all 4 cores). However some have suggested the different route of changing the Turbo multipliers separately. What is best ?

I have also seen some users advising its worth turning the thermal monitor off, whilst increases the turbo power limit and the core current limit to 250.

With a change like this do I also still need to change voltages, the CPU PPL maybe down a little ?
Do I then leave the CPU Vcore as Auto

I have core temp and CPUz installed, and also seen Prime 95 is listed as being essential to run after an O/C - is this advised ?

I will continue to read the excellent guides here but in the mean time would be very much appreciate any help I can get.

Thanks
 
Don't have the 3570k, but the non-k (nonk) version. And have the same board as well.

On the 3570 nonk I have, I was able to simply change in the BIOS CPU Clock frequency to a 40x multiplier and leave it at that (That's the nonk max supported all core Turbo clock). Whilst leaving all options on default stock auto. So you should be able to do that at a very minimum, and you should notice the difference between 3.4ghz and 4.0ghz. Your unlocked multiplier should allow higher numbers if you want to venture further. So the instructions you received about bumping the ratio to 42 would be that and accurate (just make sure as always to have appropriate cooling on your CPU before doing so though).

For the individual core changes, that's useful if you're doing anything single threaded so it can jump higher but often I found that the difference is marginal in doing that. So you're looking at something like 1 core at 4.4ghz, core 2 and 3 at 4.3ghz and core 4 at 4.2ghz (so around a 200mhz difference at best; at least in my case anyway). Also, what determines single core thread or multi is a bit random depending on what you do anyway, so it's likely better to just go with all cores at a certain frequency and leave it at that.

Once you've changed the multiplier, if you don't like the temps, remember that you can also slowly work the voltage used down to reduce temps and power usage, as most chips don't need the amount that auto voltage provides. That's when you'd mess around with the other voltages a bit more. CPU PLL and other stuff can be left on Auto or Default really. It really shouldn't impact on that setup much unless you're going really aggressive with an overclock or undervolt.
 
I had my old 3570k running at 4.2ghz with a Hyper 212 Evo under 65 degrees. I never touched the voltage either. I increased the core multiplier for all cores to 42.

I had 4.4 running but it wasn't totally stable under full load for too long, was getting memory issues - I'm assuming it was due to not changing the voltage.

I also had the GA-Z77-D3H, now it's gone to my brother-in-law still at 4.2ghz.
 
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