Reported Memory Does Not Match The Installed Memory

Recently I purchased 1GB DDR SDRAM for my computer as I have started to use a few design programs and i hoped it would solve my slow computer.
When i placed the RAM in the computer the computer only recognises 256 of the 1Gb of RAM.
Have I purchased the wrong type of memory or is this something else? any help would be great.

Spec.
Philips freeline MT2100
Intel Pentium 4 540 (3.2GHz, 1MB, FSB800)

Motherboard - (all info taken from CPU-Z)
Model: SiS-661
Chipset: SiS 661FX
Southbridge: SiS 964
Sensor: ITE IT8705
BIOS
Brand: Phoenix Technologies,LTD
Version: 6.00 PG
Date: 11/04/2004

RAM Purchased -
Samsung K4H280838E-TCCC
(details on http://www.intel.com/technology/memo...20x16_r1.0.pdf )

Hi and welcome to D-A-L

how much RAM have you already got, how much RAM can your motherboard take?

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I have 2 slots, both "should" hold 1GB (2GB total). Currently I only have a 512 in one slot and the other is empty.

Thanks!

can you try the 1GB RAM stick in slot 1 on it's own and see what that does

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Thanks for the quick reply.
It still regognises it as 256.

have you another machine you can try it on, where did you buy it from a local shop?

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unfortunately I don't have another machine to try it on.
Got the RAM on ebay, seller had good history so thought it would be okay?

has the RAM got any writing on it, any chance of contacting the seller to query the problem?

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I have tried contacting the seller but no reply yet!
The writing - Samsung 530 K4H280838E-TCCC ZKA154BJ-KOREA
appreciating the help brain_damage!

does the RAM have a sticker on it, or any where does it say 1GB?

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Please do not PM me for help.These messages will be deleted without reading.
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