gig ram installed only seeing 256

[pjnoodles]

when i first brought my pc it said it had 512 ram but it always said only 256 is installed so after a year i brought 2 512 sticks and added them but had to take the original out because it was not compatable so i should be running a gig now
my pc says its still only running 256 ram

heres the spec which says the ram is installed

anyone know what the problem could be

Operating System System Model
Windows XP Professional Service Pack 2 (build 2600) Enclosure Type: Desktop
Processor a Main Circuit Board b
1.80 gigahertz AMD Sempron
128 kilobyte primary memory cache
256 kilobyte secondary memory cache Board: Gigabyte Technology Co., Ltd. nForce
Bus Clock: 200 megahertz
BIOS: Award Software International, Inc. F6 08/13/2004
Drives Memory Modules c,d
164.69 Gigabytes Usable Hard Drive Capacity
138.49 Gigabytes Hard Drive Free Space

_NEC DVD_RW ND-3520A [CD-ROM drive]
TSSTcorp DVD-ROM SH-D162C [CD-ROM drive]
3.5" format removeable media [Floppy drive]

HDS722516VLAT80 [Hard drive] (164.69 GB) -- drive 0, s/n VN643ECDERL8JD, rev V34OA6MA, SMART Status: Healthy 256 Megabytes Installed Memory

Slot 'A0' has 512 MB
Slot 'A1' has 512 MB
Slot '' is Empty
Local Drive Volumes

c: (NTFS on drive 0) 16.47 GB 2.62 GB free
f: (NTFS on drive 0) 148.22 GB 135.87 GB free

 

[evongugg]

How much memory does the bios show?
Run CPU-Z and report the amount of memory also.

 

[evongugg]

Try reseating the memory.

 

[pjnoodles]

i ran a scan at

http://www.crucial.com/systemscanner/

this was the result



512 MB DDR PC3200
512 MB DDR PC3200
EMPTY
Maximum Memory Capacity: 1536 MB
Currently Installed Memory: 1024 MB
Available Memory Slots: 1
Number of Banks: 3
Dual Channel Support: N.A.
CPU Manufacturer: AuthenticAMD
CPU Family: AMD Sempron(tm) Processor 3100+ Model 12, Stepping 0
CPU Speed: 1808 MHz




still under the properties of my computer it says 256 ram

 

[atomicWAR]

if reseating ur memory didn't work...go to task manager...(ie hit ctrl-atl-dlt) hit the performance tab and check what your physical memory total is. if its 10240000 k or something real close than your all good. otherwise go through and check your bios settings and make sure there is nothing fishy there. and of course you could always hit the web page for your mobo manufactuer as you may need a bios flash or have a conflict with the memory you have and the board, check offical memory list. there's microsoft tech support, though i doubt they would be of any help. if all else fails get a large hammer and threaten your PC, reboot it three times and if it doesn't work. hit it with the hammer tell you feel better cause your probably has defective memory slots or memory controllor...in which case you need to buy a new cpu and board see if u can fix it swapping things out. find out which is defective and send the unused, if any, parts back to the store for a refund.