LinX and i7 990X : pass with 4GB RAM or less, error with 8GB or more, why ?

[nadstaky]

Hello,

Still on 1366. Recently purchased an i7 990X for 280?.

I've noticed that LinX passes everytime when I use =< 4GB RAM, but *NEVER* with 8 or more...

Could you tell me why please ? Need more voltage ? (:/) RAM issue ? need more RAM voltage ? (...)

Please help !

Thanks,

Nadstaky

[nadstaky]

Well... It used to pass with another version of linpack... Now, fails 4GB...

By the way, about i7 990X, what is the Vcpu Max for H24 O/C please ?

What version of linpack should I use ?

Thank you

[K404]

I can't offer advice on which version of the software to use, but if the sticks have all been tested <4GB at a time, maybe an IOH or IMC voltage needs increased a little, OR a couple of memory timings need slackened.

Please can you tell us more about your settings?

[nadstaky]

Hi and thanks

There is something VERY STRANGE : 4.37GHz with 1.344V, to reach 4.4 I have to up it to 1.376!
That's crazy !!! (LLC enabled, but does not seem to really work nice (1.43125V set in BIOS results in 1.392V idle, 1.376 linx load...

By the way, what is the maximum 24/7 real voltage max ?

Well... Here are my settings :

CPU PLL : 1.70000V
QPI/VTT : 1.19500V
CPU Vore : 1.43125V (see above what real values are)
DRAM : 1.66V
PCIE : 1.50000V
QPI PLL : 1.14000V
IOH Core : 1.14000V
ICH I/O : 1.58000V
ICH Core : 1.14000V

Multiplier : 31x140 for stable 1.344V (real) 4.340GHz
31*142 real 1.376V for 4.40Ghz (...)

I guess 4.5GHz 24/7 won't be possible :'(

Thanks in advance for your help

[K404]

LLC variation will depend on your motherboard. Some are just better than others.

Max vCore...... Personally, I always tried to keep vCore as low as possible to keep the temps down. What are your load temps?

I think you could increase QPI/VTT to 1.22v and see if that helps, then 1.25v if you need to.

The rest of your voltages..... I think they are ok


If you still have problems, you could try increasing your tRAS and tRFC.

What is your Northbridge frequency?

[nadstaky]

Well, dunno how NB Freq is named in Gigabyte MB's

My PC is fully watercooled, the higher core temp is 58-60?C

Feel free to ask anything you need

Thanks !

Eric

[TheGoat Eater]

This threat will be moved - please read the first sticky in the Xtreme Overclocking section regarding what that section is for. These kind of posts need to be put in intel section, or similar best suited section.

[Buckeye]

Thread has been moved.
Thanks for understanding

[tool_462]

This threat will be moved - please read the first sticky in the Xtreme Overclocking section regarding what that section is for. These kind of posts need to be put in intel section, or similar best suited section.

Is that a threat?

Sorry...had to.

[K404]

Well, dunno how NB Freq is named in Gigabyte MB's

My PC is fully watercooled, the higher core temp is 58-60?C

Feel free to ask anything you need

Thanks !

Eric

Try "Uncore & QPI features" I had a look on Google images, it might be in there

[nadstaky]

Ok,

Here it is :
QPI Clock Ratio : x36 => QPI Link Speed : 5.04GHz
Uncore Clock Ratio : x21 => Uncore Frequency : 2940MHz

Once again, thanks