Useable Memory on Asus Rampage II Extreme

RedGooner · 18 May 2010 at 08:03

My Spec
Intel Core i7 Extreme Edition 975 3.33GHz Processor
Corsair H50-1 High Performance CPU Watercooler
Asus Rampage II Extreme Intel X58 PCI-Express DDR3 Motherboard
Crucial 12GB DDR3 Ballistix Tracer (BL3KIT25664TN1608) 6 x 2GB
2 x Gigabyte Nvidia Geforce 285 (1024MB DDR3) HDTV/Dual DVI (PCI-Express V2.0) in SLI Mode
Creative Sound Blaster X-Fi Titanium Fatal1ty Champion Series PCIe
OCZ Agility-EX 60GB SATA-II SSD
Western Digital VelociRaptor 300GB 10000RPM SATA-II 16MB Cache
Pioneer DVR-212BK DVD-R/W
Pioneer BDV-202BK BD-ROM
Enermax Revolution 85+ 850Watt PSU
Logitech G15 Gaming-Grade Illuminated Keyboard
Microsoft Sidewinder X8 Gaming Mouse
Coolermaster Stacker 830 Evolution - Nvidia Special Edition Full Tower
Dell Ultrasharp 2407WFP 24" Widescreen LCD Monitor

Nothing is OVERCLOCKED at moment.

I have 12GB of memory installed, a 2GB (BL3KIT25664TN1608) in every slot. But my mobo reports only 8GB as useable. CUPID reports all modules installed.
And Win 7 64Bit only sees 8GB.

I am running the lastest BIOS.

Is there anything i can do to get the full 12GB or is this to do with my 2 x Nvidia 285 in SLI.

Thx

Red

Nickson · 18 May 2010 at 08:53

I had a similar problem.. Im only running 6GB, but only 4GB would show up!
Nothing was overclocked at the time, and I only noticed it because I accidentally went into system on Windows 7 and saw that it was reporting 4GB.
CPU-z reported 6gb as well..
My problem was that a module was dead. It still showed up in CPU-z as having 6GB Triple channel installed.
Just an idea, you may have 2 dead sticks

RedGooner · 18 May 2010 at 09:04

I brought 3 sticks of 2GB in December 2009, and 3 more last week, so be surprised if have 2 sticks dead...

Maybe its dead slots, will have to do some tests...
Did your system show full memory after wards ???

Nickson · 18 May 2010 at 11:15

When I had the replacement sticks through yeah, it showed up as 6GB again! Whilst using the same slots on the motherboard.
I only had my setup since the start of January and one of mine had failed.

RedGooner · 18 May 2010 at 21:25

Thanks Nickson, One of the Orginal 2GB sticks is at fault, in slot C1, so also took out slot C2, so now have 10GB showing, and 1 empty slot, RMA in the morning.

Thanks again. But feel foolish i did not think of it my self...DOH
Red

RedGooner · 26 May 2010 at 09:43

Update:
Sent 2GB DIMM under RMA to Crucial on Thursday, got replacement on Tuesday. So 3 business day turn around.

Now have 12GB shown in bios.

Red