Vanishing Memory

champ_evans · 4 Jan 2012 at 16:11

I have a ASUS Rampage Extreme 3 Motherboard, with 12 gig of memory fitted. Th problem is that unknown to me until now it has sometimes been showing in my bios and in windows system at only 8 Gig.I tried inserting and reinserting the 3 x 4 gig into their respective slots A1, B1 and C1 orangy reb in colour slots. I have also tried icreasing my memory voltage to 1.52 volts but no luck until I saw a setting in the bios which you can set to recheck the memory on error. This solved the problem but leaves me thinking I am missing somethng because sometime it boots up past post check first time and sometimes it restarts before booting, but now always showing 12 gig
My memory is
Corsair Vengeance 12GB (3x4GB) DDR3 PC3-12800C9 1600MHz Triple Channel Kit (CMZ12GX3M3A1600C9)
Corsair Hydro H100 Extreme Performance Liquid CPU Cooler
Intel Core i7 960 3.20Ghz (Nehalem) (Socket LGA1366
Windows 7 Pro 64
Any help would be gratefully received

Surveyor · 4 Jan 2012 at 17:45

Damaged pins in the CPU socket can cause you to 'lose' a RAM slot.

What CPU cooler do you have? Over tightening those can have the same effect.

champ_evans · 4 Jan 2012 at 18:03

Corsair Hydro H100 Extreme Performance Liquid CPU Cooler

wazza300 · 4 Jan 2012 at 18:08

Yes for sure bent pins with missing memory,can be not enough qpi/vtt or on asus imc voltage too

Surveyor · 4 Jan 2012 at 18:16

champ_evans said:
Corsair Hydro H100 Extreme Performance Liquid CPU Cooler

Try loosening the screws securing the pump/block a turn each and see where you are then.

You don't want to loosen them too much otherwise it won't make good contact with the CPU.

Yellowbeard · 4 Jan 2012 at 20:00

Reseat your CPU. If that and the other tips given here fail, try raising your CPU-VTT voltage 1-3 steps above stock.

champ_evans · 4 Jan 2012 at 21:29

Thanks for all your help and advice will try all of the tips

hanluc · 6 Jan 2012 at 09:26

Surveyor said:
Try loosening the screws securing the pump/block a turn each and see where you are then.

You don't want to loosen them too much otherwise it won't make good contact with the CPU.

+1, This was my problem on my X58 Sabertooth when my bios reported only 4 instead of 6 gigs of RAM, I loosened the CPU heatsink and it cured it.

goodl · 6 Jan 2012 at 10:45

I had this problem with my x58 P6T, I smell a conspiracy

Van Diemen · 18 Jan 2012 at 23:01

had a similar problem, setting the "REF Cycle Time" to 100 fixed the issue.
See here: http://www.youtube.com/watch?v=R_9MwkZ8cjs