Please help with my OC im stuck at 4.6Ghz

[nick.lidgett]

Hi 8 Pack,

Im trying to OC my 2600k as much as possible for 24/7 usage but im stuck at a steady 4.6Ghz and im wondering if you can help me achieve more.

I recently bought a MSI Z77 Mpower board and 16Gb Avexir Mpower RAM from OcUK to go with my 2600k.
After water cooling the whole system i decided to overclock my CPU. After reading from the Official MSI z77 Mpower thread on here i decided to follow these settings;

Internal PPL Overvoltage - ENABLED (1.8v)
CPU Vdroop Offset Control - +100%
EIST - DISABLED
EUP 2013 - DISABLED
CPU Phase control - AUTO
C1E Support - DISABLED
INTEL C State - DISABLED

I then proceeded to over clock the multiplier gradually and run IBT at High and then Prime95 Large, wacthing the temps and volts using HWmonitor and CPU-Z, if it crashed out, reset and up the volts a bit and retry.

Below is a list of my atempts, sorry if its overkill i just want to give you as much info as possible.

Attempt > (Bios & CPU-Z) > Multi > Voltage > Boot Win8 > Idle temp > IBT High > Prime Large
1.Bios 40 1.25 Yes
CPU-Z 40 1.24 27oC 49oC 45oC

2.Bios 43 1.25 Yes
CPU-Z 43 1.24 28oC 52oC CRASH

3.Bios 43 1.30 Yes
CPU-Z 43 1.28 29oC 55oC 50oC

4.Bios 45 1.30 Yes
CPU-Z 45 1.28 30oC CRASH

5.Bios 45 1.32 Yes
CPU-Z 45 1.30 30oC 57oC CRASH


6.Bios 45 1.35 Yes
CPU-Z 45 1.33 30oC 58oC 53oC


7.Bios 46 1.35 Yes
CPU-Z 46 1.33 29oC CRASH

8.Bios 46 1.36 Yes
CPU-Z 46 1.35 30oC 59oC 52oC

9.Bios 48 1.35 CRASH
CPU-Z N/A

10.Bios 48 1.38 Yes
CPU-Z 48 1.36 30oC CRASH

11.Bios 48 1.40 Yes
CPU-Z 48 1.39 31oC CRASH


So after reading through that lot, what do you reckon? i am currently using ATTEMPT 8. Do you think i can get more? or is 4.6Ghz what my chip can do?

Thanks for reading and for your time.

 

[illuz]

Try 4.7 at v1.39-v1.4. That would probably be your limit unless you don't mind going over v1.4, you can probably hit 4.8 at v1.43.

 

[nick.lidgett]

Try 4.7 at v1.39-v1.4. That would probably be your limit unless you don't mind going over v1.4, you can probably hit 4.8 at v1.43.

so im dead safe where i am now then? (46 x100 @1.36)

I didnt really want to be at 1.4v as after a lot of reading the majority of people say 1.38v is absolute safe MAX for this chip 24/7.

 

[Rooster212]

Well I run 1.44v stable 4.5ghz on my 2500K and I have no issues, it is all to do with temps and how far you are comfortable with going. I've been benching 4.7ghz at 1.46v, it is not 100% stable as it always seems to crash on Fritz Chess (managed to get a couple of results out but it always crashes on it at some point!).

Intel states that the maximum safe voltage is 1.52v. Not that I would go near that for 24/7 usage, but i'd probably go to 1.475v to bench. I am not custom water cooled or anything, just a H70.
Obviously at 1.52v, your chip will be throwing out some mega heat, so if you don't have the cooling I'd stop at 75 degrees for 24/7 usage, and 80-85 on benches I'd back off the volts.

At the end of the day, it depends how far you want to go and if you have better cooling, you can push it further. I wish my chip would go to 46x at 1.36v but it just doesn't like it.

 

[8 Pack]

IBT= waste of time silicon destroyer!!! Use your system as indication of stability.

I would enable EIST but disable all C states.
Leave internal PLL overvolting at auto but tune chipset PLL anything from 1.55 up. Try as many values as you can. Set I/O at 1.075v. Keep an eye on temps but 1.475v is absolute tops for 24/7.