• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

Sandy Bridge - My findings regarding memory and the processor

johny dolan said:
Doing this has fixed it http://vip.asus.com/forum/view.aspx...d_id=1&model=P8P67+PRO&page=1&SLanguage=en-us now it cold boots fine using the xmp settings and 1866.
Click to expand...

I suspect that the reset has re-worked all the ram settings. I suspect as you go messing about, particularly with BLCK or RAM speed these will get messed up again. Could you take a note of the secondary timings from the Bios and then next time the system starts playing up compare them again to see if the bios has changed them.
 
I wish you hadn't asked me to do that lol.

Just gone into the bios and wrote down the secondary timings saved and exit and it wouldn't boot so back to bios and it had changed them so i put back to the numbers i just wrote down saved exit and it still wouldn't boot.

Pressed f5 to reset and selected xml and it posted ok but dont know if im gonna have the cold boot problem again now ill go test that.

Is this mobo A pos or is it my ram or both.
 
johny dolan said:
I wish you hadn't asked me to do that lol.
Click to expand...

Sorry.... you should not have saved when exiting... just switched off or exit without saving.

When you manually entered the secondary timings... did you leave the two DRAM RTL's on AUTO?
Also, now you have it working again.... are the settings the same as you wrote down?
 
Last edited:
when i wrote them down they were all set to auto i didn't make any changes just saved and exit and then it wouldn't boot when i went into the bios the values had changed but were still on auto and even when i wrote them in to what they were before it still wouldn't boot..

Should i buy some different ram or a different mobo or hope asus fix it with a new bios im not sure but its very fussy and starting to annoy me now.
 
johny dolan said:
when i wrote them down they were all set to auto i didn't make any changes just saved and exit and then it wouldn't boot when i went into the bios the values had changed but were still on auto and even when i wrote them in to what they were before it still wouldn't boot..

Should i buy some different ram or a different mobo or hope asus fix it with a new bios im not sure but its very fussy and starting to annoy me now.
Click to expand...

Can you post the settings you wrote down please?
 
Secondary timings 7 - 150 - 7282 - 10 - 7 - 35 - 7 -5 -8 -32 -33

I wish i wrote the 3rd timings down aswell while i was at it but im scared to go back in in case it screws up again lol.
 
johny dolan said:
I wish i wrote the 3rd timings down aswell while i was at it but im scared to go back in in case it screws up again lol.
Click to expand...

Thanks... Going back in should be fine so long as you don't save... clearly even if you have not made any changes. Just leave without saving and it should be fine.
 
Ok so a bit more work on this tonight has yielded the following...

The Ram value that seems to be blocking overclocking seems to be
DRAM CKE Minimum Pulse Width: or tCKEMin (acording to google)

I can leave all the second and third ram settings on Auto, but this one vale seems very important. On my board and OCZ ram this gets set to the following on auto..
1600 - 4
1866 - 5

I have tried the following values with...

3 - Stable to 4.8GHz - Locks instantly at 4.9GHz
4 - Stable to 5.4GHz
5 - Stable to 4.8GHz - Locks instantly at 4.9GHz
6 - Stable to 5.4GHz

I'm sat wondering if its as crazy as odd values = bad and even values = good

Johny_dolan, your value shows as 5. Now it maybe very specific to the chip and RAM and motherboard come to that, but I wonder if a 4 in that value might make you stable?

Any guidence on this 'DRAM CKE Minimum Pulse Width' would be very welcome... I didi not really find much out on google.

Also some feedback... What value is yours set to and can you get a very high overclock?
 
I've tried to use some of the settings you've suggested here and it seems I just cant go any higher than 4.7 from my 2500k , this is stable for me at 1.35 vcore, if I try 4.8 I get bsod almost instantly of starting up prime.

I could possibly use more volts, but I'm happy at 4.7 so will leave it there I guess
 
Ive not tried higher than 4.5 overclock but it was prime stable and temps max around 70c.i ran a few benchmarks which i posted above then set it back to 4 gig for 24.7 and been gaming happy since.

Very happy with with it all now ive got the ram booting at 1866 and no more cold boot problem.

My cpu has always been stable at whatever speed ive set it to the only problem ive had was with the ram speed and cold boot issue which is now all working as it should do.
 
You must log in or register to reply here.
Back
Top Bottom