2500K @ 4.7GHz

Deleted member 2277 · 27 Mar 2013 at 21:27

Hi,

I have fitted a 2500K CPU in my MSI Z77A-GD65 motherboard and I am seeing how high it will overclock.

I currently have it at 4.7GHz @ 1.32 volts, Temp approx 69 deg on air. Prime 95 so far has been running for 2 hours. Is this good or bad result for this processor?

I have booted at 5GHz @ 1.35v but Prime 95 fails after a couple of minutes. I have increased the voltage to 1.4 but Prime still fails. I'm a bit nervous about going any higher.

Suarez7 · 27 Mar 2013 at 21:32

Try 4.9 at 1.35?

Deleted member 2277 · 27 Mar 2013 at 21:36

I did try 4.9 but I can't remember what voltage I used.

If 4.7 is 100% stable I will try 4.8 next.

Edit: I think the sweet spot for this CPU is going to be 4.5GHz @ 1.28volts as the temp drops to 60 deg.

Doomedspeed · 27 Mar 2013 at 22:23

Deleted member 2277 said:
Edit: I think the sweet spot for this CPU is going to be 4.5GHz @ 1.28volts as the temp drops to 60 deg.

Well said, most 2500k's have 4.5 as there sweet spot.

Yours clocks pretty similar to mine (though yours is a little better).

Try 4.8 but don't go over 1.38, i know 1.4 is still safe but not for a potental 24/7 clock.

Max3 · 27 Mar 2013 at 23:29

Seems good to me. Look at mine

.

Rooster212 · 28 Mar 2013 at 00:22

lol mine doesn't get stable at 4.5ghz till 1.44v... consider yourself lucky!

Deleted member 2277 · 28 Mar 2013 at 07:31

Rooster212 said:
lol mine doesn't get stable at 4.5ghz till 1.44v... consider yourself lucky!

Well I must be! I think this cpu could do 5GHz at that voltage!

roadie · 4 Apr 2013 at 17:14

I am having to OC my system again after upgrading to the latest BIOS and forgetting to save my overclocked profile. What voltages are you using for the CPU IO and CPU SA?

I am at 1.1 for both and am wondering if I can go lower to save a bit of power. CPU is set at 1.28 for the speed in my signature.

Rooster212 · 4 Apr 2013 at 17:39

roadie said:
I am having to OC my system again after upgrading to the latest BIOS and forgetting to save my overclocked profile. What voltages are you using for the CPU IO and CPU SA?

I am at 1.1 for both and am wondering if I can go lower to save a bit of power. CPU is set at 1.28 for the speed in my signature.

Go down one step at a time, one voltage at a time until you get unstability (that is what I'd do anyway) every chip is different!

Deleted member 2277 · 4 Apr 2013 at 17:40

I have all my voltages on Auto for 4.5 and for 4.7 I have set the vcore @ 1.32v, I haven't touched the CPU IO or SA voltages. IO = 1.05v and SA = 0.92v

When running at 4.5 in auto the vcore max is 1.288v. I have stress tested using Prime95 and furmark for 24 hours (at the same time). I have decided to leave the processor at 4.5 and voltage in auto so that the voltage is reduced when the CPU is idle.

roadie · 5 Apr 2013 at 10:09

Auto voltages for CPU IO and SA are not stable so I will need to do some fine tuning.

Cheers guys.

Doomedspeed · 5 Apr 2013 at 10:57

Deleted member 2277 said:
I have all my voltages on Auto for 4.5 and for 4.7 I have set the vcore @ 1.32v, I haven't touched the CPU IO or SA voltages. IO = 1.05v and SA = 0.92v

When running at 4.5 in auto the vcore max is 1.288v. I have stress tested using Prime95 and furmark for 24 hours (at the same time). I have decided to leave the processor at 4.5 and voltage in auto so that the voltage is reduced when the CPU is idle.

You don't have to have it on auto for it to reduce when idle. If you enable speedstep (and c states) it will do that anyway. For this to work you'll need to have your power settings (in Windows) set to balanced or power saving.