Just bought 2 x 4GB DDR3 1600 RAM mods for my ASUS MoBo - their site says it can handle 4x4GB max ... problem however appears related to CPU capacity, where OS is only showing 4GB usable of 8GB ...
I've a 1st Gen i5 750 CPU on deck ... any ideas?
you may be onto something, i replaced the original 2 x 2GB mods and the PC came up (eventually)
however, performance has been dire and just cheked perf mon ... only seeing 2 Gigs
Case is open as i type, swapping modules but now can't get the blasted thing to come up ata ll ... :S
ok, can't get this damn PC up ... won't get past POST
stripped everything out apart from CPU & Mem, but stopping on RAM check ... this is very strange, is it possible one of the DRAM housings or the memory are at fault?
Few possibilities, first look in the BIOS for Memory Remap Feature -> Enabled ; second, what exact set of RAM do you have installed (I need a link) the RAM isn't set per rated. MSCONFIG set with a 4GB limit, it should be set as shown -> http://i1013.photobucket.com/albums/af254/Jaquith/Boot_...
Q - What exact RAM? ; link required
Simplest way to set the RAM with your 2.66GHz CPU:
BIOS: AI Overclock Tuner -> DOCP
DRAM OC Profile -> DDR3-1600MHz
If you provide the link then I'll add the following...
DRAM Timing Control -> Manual
DRAM CAS# Latency -> ??
DRAM RAS to CAS -> ??
DRAM RAS PRE -> ??
DRAM RAS ACT -> ??
cpu temp is an issue - there isn't much dust!
just reset bios to DOCP as mem had reverted to 1000mhz, set to 1600 but didn't get to logon - at POST got warning on CPU temp, then dropped out through startup
left idle for 5 mins, started up but still failing to get to windows logon - powers off through startup
Got the paste ....
However, bent pins when reseating CPU, which stopped working - PC went out the window ... nearly
Managed to get them back inline (following 2 x Peroni's to settle the nerves).
CPU now at a comfortable 37c ... and got the 2 x 4GB RAM's up as well
Now @ 8GB running sweet as a nut ... result
Thanks to Jaquith for your knowledge and guidance !!