ok so on that it was only ready 2gb of the 4gb i have. i figured it must of been 1gb sticks as i had 2 of them but was only reading one for some reason no wonder it was maxing out ram doing anything! i have 2x2gb stick of genuine (bought 1 stick from someone on here) not mixing and matching. i bought pairs of ram for other computers that i tried and they didn't work. either only read 1 stick or BSOD on boot after my issues the other day it was only reading 1 stick of genuine ram so tried the 2x8gb sticks from my current computer again and it only read 8gb what causes it to only read 1 stick? i have read somewhere about voltage causing it but cant seem to find anywhere in the bios to change it. i did find that page and had a look but don't know if i want to buy more ram and have it not work. the only stuff that has worked is the genuine stuff. i guess if i get ECC then there's more of a chance it should work.. seems i have a fussy MB would 8gb be enough or is 16 the go? i have 16gb in my pc but never really need much more than 8-10 and that's with chrome taking 2.5gb! and i'm doing a lot more on it than what the htpc/nas would do.