I have a custom built tower with an ASUS A7V400-MX motherboard, which had 2x500mb cards. I got 2 new 'Crucial' memory modules brand new in static packs, which were DDR (not DD2/3) and 1 gig each, which is what the manual says this motherboard can take max.
So I put the 2 new 1 Gig modules in and turned PC on and it started a slow repetitive beeping. Then took memory out and put one of the old 512mb back and this time it booted. Finally turned it of and put one of the new 1 gig ones in as well, rebooted and checked task manager and it only seemed to be using 500mb.
Can't work out why it won't recognise new memory. I checked upgrade for this motherboard on crucial site (link below) and it lists the memory module, but I noticed this said (NON-ECC) and the new mosule says ECC on it. Is it this that is causing the problem perhaps or is there something else I can do to check why it is not recognising?
Many thanks for any suggestions
Edited by AndrewSe, 13 June 2014 - 01:05 PM.