J4CKO

iTrader: (1)

Installed Windows 7 64 bit to our three year old pc rather than buying a new one as a new one was looking liek costing £800 to improve on what I already have, so bought a new 1tb drive, win7 and a couple of 2 gb corsair ram.

Its all up and runnign but its saying 6 gb ram (3gb usable), whipped the old ram on (2 x 1gb) and it was the same, have 4 in now and it says 4 gb (3 usable)

Its a Dual core e6750, on an MSI motherboard, 9600 gt, 1 500 gb drive and one 1tb drive.

I tried the msconfig thing and it didnt work, the Bios reports 6 gb, windows does but I cant understand why it cant use it, not that bothered as 3 gb s plenty for what I do just thought that seeing as the extra cost me 80 quid I may as well use it.

jura11

iTrader: (7)

Are you confident that you are running 64 bit and not 32 bit W7?Try download CPU-Z and download and Under CPU-Z if you go over to SPD tab I'm assuming it shows all the slots correctly.

Tidgy

sounds liek you installed win 32 rather than 64, are you sure your baord can run all of that f its that old? might be it can only run 1gb sticks

jura11

iTrader: (7)

Sometimes helps,Flash BIOS for motherboard

J4CKO

iTrader: (1)

Its definitely 64 bit windows, its running 2 * 2gb in dual channel mode according to CPUz but still reporting 4 (3 usable), if I put the 2 one GB modules in it reports 6 gb (3gb usable).

Migth be a mobo limitation, trouble is its a generic MSI Tesco Medion thing, migth end up replacing it but I really cant be bothered gutting it again and having to re-install Windows again, might just live with 3 gb.

ALi-B

iTrader: (1)

What chipset does that MoBo use? CPU-Z should be able to tell you (under the mainboard tab).

If its an intel 945p or similar, then it won't be able to use any more than 3.5gig (roughly, depends on hardware spec).

Basically whilst these chipsets support 64bit CPUs and 64bit OSs, they don't support 64bit memory addressing, so you have the same RAM limit as with a 32bit OS.