Overclocking i5 2500k

[JG14_Jagr]

Originally Posted by jayrc

I'm ready to overclock my i5 2500k cpu w/ asus p8p67 evo mobo, they got a few options, don't know where to start. Going to watch some youtube video but you guys have been so great thought I'd ask here.

Jay, do some google searching for overclocking your particular board. The first issue you need to be sure of before you so anything is cooling.. a stock HSF will allow "some" overclocking, but not a lot. Read up before you do anything.. while you are using it it is burning in so there is no rush. Until you know what you are doing its not worth messing around..

[jayrc]

I'm using a coolermaster n520 cpu cooler, it's got 4 heat pipes and 2 fans, I was looking in the bios and there are a bunch of auto buttons to choose from but not sure, I don't really want to mess with the voltage but that might change, hoping someone here who has this mobo could steer me in the right direction, off to google some more.

[jimbop]

Best to use BIOS rather than the windows application since this often sets voltages higher than they need to be (more power, less lifespan). Try here for a good starting guide.

Most important settings are the core frequency (clock), multiplier and Vcore voltage. For the 2600k which is a very similar chip I started out by just increasing the clock to 45 (i.e. 4.5 with the multiplier left at stock 100x) and increasing the Vcore to 1.39. You can then increase the multiplier if you want and gradually decrease the Vcore until you are unstable.

Make sure you do some stress tests using prime95 or similar and keep an eye on your temperatures using CPUID HWMonitor or the mboard app. Also, note that the voltages specified in BIOS are often lower than appear in windows (e.g. in CPUID CPU-Z) due to vdroop. The value reported in windows is the 'real' one since this is the loaded voltage.

[kendo65]

Maybe this will be helpful:

http://www.bit-tech.net/hardware/cpu...ore-i5-2500k/1

[jayrc]

okay I overclocked using bios but under system it still says 3.3ghz, only in bios can I see, 4200 mhz turbo and 1600mhz memory, is this right? does it only overclock the turbo?

[ytareh]

Most utilities arent reporting the Sandybridge temps/speeds etc properly yet .Dont worry youre running at high speed!

[Warhound]

CPU-Z will report the correct clocks...just remember these chips downclock and reduce voltages when not stressed. So run something like OCCT or prime 95 and look at CPU-Z while stresstesting with the other tool(s).