MSI P67A-GD65 & 2500K OCing query

mikeo · 11 Jun 2011 at 23:26

Hi

Now I'm probably being lazy here and "yes" I have read the various guides for OCing the 2500K processor (bittech has a nice write up for this board) and all pretty much seem to suggest changing the CPU ratio is the way to go.

Well if I just change the ratio on this board from 33 to 42 and leave everything alone (yes I know voltages are on auto). I seem to end up with a permanent OC of 4.2 (IE. it doesn't appear to down clock under light load back to 1.6) and at 1.36 the CPU voltage is probably a bit high for this OC.

So I noticed a video on YouTube that suggested leaving everything as "default" in the BIOS and simply going to the "CPU feature" section in the BIOS and changing the core ratios (turbo boost I'm assuming here) from 37/36/35/34 to 42/42/42/42.

Well I tried the above and I now appear to have a system as before but the turbo boost just pushes all the cores to 4.2 and voltage under IBT would appear to be a much more reasonable max of 1.288 (IE. well under the max 1.35 that seems to be talked about as 24/7 safe). Temps on all 4 cores hit a max of 60C under standard run of IBT.

I also left my XMS3 RAM to run at 1333 as this appears to use a voltage of 1.5 rather than when running it at 1600, where it uses 1.65v.

Question... is there any drawback to using this extremely simple method of OCing this board/CPU?

I'm not looking for the fastest OC. Just a decent free boost, while maintaining my system as stable as possible.

I'll be interested to hear peoples opinions on this.

Surveyor · 12 Jun 2011 at 00:27

That's the way I've overclocked a 2600K on my MSI P67A-GD65.

No issues here after several months.

Sits at 1.6GHz idle and bumps up to 4.8GHz when needed.

Obviously I had to tweak a few voltages for that.

Big Kev · 12 Jun 2011 at 01:02

I have the same mobo/cpu/ram and set mine to 45, with 1.295v and ram set to 1600mhz and it's perfectly stable, although my temps at load are 64c.

mikeo · 12 Jun 2011 at 10:45

Surveyor said:
That's the way I've overclocked a 2600K on my MSI P67A-GD65.

No issues here after several months.

Sits at 1.6GHz idle and bumps up to 4.8GHz when needed.

Obviously I had to tweak a few voltages for that.

So doing it this way looks to be a valid way forward.

I'm quite happy at 4.2 turbo boost. Everything on auto is the lazy mans way. but voltages look fine to me. I suspect that I could get them a bit lower with fiddling, but can't see the point if it's stable "as is".

mikeo · 12 Jun 2011 at 10:48

Big Kev said:
I have the same mobo/cpu/ram and set mine to 45, with 1.295v and ram set to 1600mhz and it's perfectly stable, although my temps at load are 64c.

Out of interest. What voltage are you running the memory at? and what cooler are you using? As this was the only other thing I was unclear about.

cjgardens · 12 Jun 2011 at 10:52

Yes that's how you clock with the sandy. Bit strange at first but so much easier.

I would set your cpu volts tho. They will under volt when not in use

look at the last few post of this thread. Look at my screen shots. My cpu is at 5.1 but down clocks to 1.6

http://forums.overclockers.co.uk/showthread.php?t=18259741

mikeo · 12 Jun 2011 at 11:12

cjgardens said:
Yes that's how you clock with the sandy. Bit strange at first but so much easier.

I would set your cpu volts tho. They will under volt when not in use

look at the last few post of this thread. Look at my screen shots. My cpu is at 5.1 but down clocks to 1.6

http://forums.overclockers.co.uk/showthread.php?t=18259741

Slightly confused by your comment
"I would set your cpu volts tho. They will under volt when not in use"
They appear to even if the voltages are set to auto? Just like they do if you've selected "default settings" in te BIOS.

cjgardens · 12 Jun 2011 at 11:19

Im talking about when you get to higher clocks you need to set the volts. I can't have my chip at 4.8 or what ever and leave the volts set to auto.

Big Kev · 12 Jun 2011 at 12:06

mikeo said:
Out of interest. What voltage are you running the memory at? and what cooler are you using? As this was the only other thing I was unclear about.

1.5v mate and all fine using Prime Blend.

I actually queried this with Overclockers before purchasing and they told me they use this ram at 1.5v on their builds.

cjgardens · 12 Jun 2011 at 12:27

My ram is rated at 1.65 and i run it at that no problems

mikeo · 12 Jun 2011 at 12:39

cjgardens said:
Im talking about when you get to higher clocks you need to set the volts. I can't have my chip at 4.8 or what ever and leave the volts set to auto.

OK. I see what you mean now.

mikeo · 12 Jun 2011 at 12:40

Big Kev said:
1.5v mate and all fine using Prime Blend. I actually queried this with Overclockers before purchasing and they told me they use this ram at 1.5v on their builds.

Interesting to hear that. Think I'll try the memory at XMP ratings but drop the volts to 1.5v and see what happens. I had queried this on another thread and this is pretty much what other folks said as well. Though a number commented as cjgardens that it "should" be OK at 1.65v.

cjgardens · 12 Jun 2011 at 12:47

Been running mine for a few weeks at those volts and i know a few others the same. All so running my chip at 1.41 volts 24.7