Only Half of Memory Shows Up?

[DaMutha]

Sorry if this is a basic question, but I haven't been able to find the answer. I have a PC with 512MB of PC1066 RDRAM installed. However, when I go into the "My Computer Information--General" area of XP, it lists the memory capacity as 256MB. Then, when I go into the Task Manager, it shows Physical Memory of 523680 total, around 240000 available and around 287000 system cache.

Can anyone enlighten me on whether something is amiss here? Thanks.

 

[ChampionAtTufshop]

download sandra and see in there
maybe its just windows being st00pid lol

 

[John]

What does the bios report?

 

[OverVolt]

Are you sure it's not virtual memory and not physical memory? If not then check what your BIOS says hit "del" or some f key prolly f10 or something around that. a little more info on your system might help too

 

[DaMutha]

I took the Sandra suggestion, and it confirmed that I've got 512 installed. It's interesting, as it lists 4 memory sockets, and shows only one containing a 256MB stick. However, in a different place it indicates that Sockets 0 and 1 are occupied. I wonder if Windows can't see Socket 0?

FYI, it's a P4 2.8 on an ASUS P4T533-C