Asus P8P67 Pro + Corsair XMS3 1600MHz 4GB x2 9-9-9-24 stability

Craig321 · 29 Apr 2011 at 14:05

I ran Prime95 for the first time yesterday on my new machine, and it fails quite quickly with a rounding problem.

So I took the memory down to 1333MHz and it's perfectly stable now, no errors in Prime95 (phew).

Before I start messing about with settings to make this stable at 1600MHz, does anybody have the same combination of motherboard and RAM that knows what settings need to be changed to make this stable?

Thanks.

!TIMMY! · 29 Apr 2011 at 16:31

Have you enabled the XMP profile on the mobo to get the 1600MHz speed and 9-9-9-24 timings?

RJC · 29 Apr 2011 at 16:43

Setup the ram and test with mem test, I had problems with my build which was faulty memory cousing prime to fail.

Craig321 · 29 Apr 2011 at 18:10

!TIMMY! said:
Have you enabled the XMP profile on the mobo to get the 1600MHz speed and 9-9-9-24 timings?

Yep, just tried that and it's crashing now during Prime :/

Will check the settings again and run memtest if everything looks ok as far as bios settings go.

Craig321 · 29 Apr 2011 at 19:36

Ok, I have now enabled the XMP profile and left everything on automatic which has put the RAM to 1333MHz by default and is perfectly stable.

When I set the RAM to 1600MHz with the XMP profile on, it freezes and crashes the machine.

Also the CPU runs at 3.5GHz now which is below it's 3.8GHz target, probably down to the XMP profile which is setting a 1:5 FSB : DRAM ratio

Mario · 29 Apr 2011 at 19:43

I have exactly same mobo and ram,and i running ram at 1600 9.9.9.24 T1 Prime95 stable...

Craig321 · 29 Apr 2011 at 19:45

What other settings are you using?

Mario · 29 Apr 2011 at 19:49

you mean cpu settings? coz ram settings you already know
i will make photo lil bit later if you want

Craig321 · 29 Apr 2011 at 19:57

Yeah please. I need CPU / voltage settings if possible please, also how many volts do you have going through the various components?

Thanks

Mario · 29 Apr 2011 at 20:19

I will do that in about 1.5-2h,im not at home atm
Edit: sorry,im lil bit late

BTW,i am still using 1204 bios,i find that bios best,with 1305 my friend bricked board,so i decided pass on new bios for some time
Also,i didnt have much time to play with OC,thats why i just set 1.31vcore and 4.2ghz

Theres probably still lots of tweaking,especially with cpu,but i dont have much time,and pc works ok,so atm im not touching it anymore
Hope it helps with your problem,good luck

Craig321 · 30 Apr 2011 at 00:41

Thanks very much for those, there are a few differences there, especially with the DIGI+ VRM settings. I wouldn't have thought I'd need to change much to get things running at stock speeds though.

By the way I'm on the latest BIOS here - 1502. It's what came on the board.

I'll have a play.

Thanks again.

[Edit]
I'm back to defaults for now after playing a little with XMP etc. - 1333MHz RAM with the default 3.8GHz "turbo".

Unfortunately you have a lot of settings different to me because of the overclock. I really would like to have mine running 100% stable at full stock speeds to begin with, then I can start playing with clocks.

In games/encoding it's fine, I happily completed Dragon Age 2 on max with the high res pack, however I'm not happy with Prime95 failing regardless of what people say

Turning XMP on seems to make things worse, rather than just failing Prime it'll either freeze or switch off. I have monitored temps and they're all fine.

Your help is much appreciated Mario. I guess I'll either have to play with volts / DIGI+, unless anyone has any ideas?

Thanks.

Mario · 30 Apr 2011 at 01:35

Well,i guess first you should find your stock stable,like you said,then you can try play with OC.
Also keep in mind,that those Asus p8p67 boards not that great as many thought - i also already rma'd one because one day board decided that i dont have any cpu

As i said,i didnt have much time to play with 2600K and that mobo,but this weekend i should find some time (must clean pc,so will try other settings)im just gonna write here,no point to create new thread.
To be fair,i am not big fan of Prime (its stable for me tho),i just leaving pc for few H doing stress tests with more real life tests - game benchmarks,etc.
If you want,you can post your settings,i will try them on my system during weekend,so maybe we can find out whats the problem.

Craig321 · 30 Apr 2011 at 10:40

Currently all my settings are stock which is rock solid. 1333MHz RAM, 3.8GHz (turbo). RAM is at 1.5v, 9-9-9-24, 2T.

Now when I turn the XMP profile on it'll up the RAM to 1600MHz, 1.65v - basically what it has been rated for. This will cause the PC to reset when running Prime. It'll generally do this within 10 minutes.

If I simply keep everything at stock and choose 1600MHz RAM from the list, it'll run Prime no problems for hours, but will stop various threads due to rounding errors (i.e. the PC doesn't completely crash).

My guess is I'm missing something, maybe a voltage that needs +0.1/+0.2, there are a few settings I don't quite understand yet on this board as they never existing on my old P35-DS4, or at least they are called something different.