motherboard does not recognize ram past 512mb

Hi, im trying to upgrade this pc for my bro, he bought him a 1gb stick of ram but when i plug it into his mobo it only reads it as 512mb, the strange thing is even though i have a 1gb in the mobo by itself it reads it as a 512mb, according to the mobo specs it can support up to 2gbs, is it something wrong with the mobo bios, how do i make the pc recognize the new amount of ram?
its a IDOT ID-PCM7E PC2500 motherboard.
link to mobo info.
http://www.idot.com.tw/en/products/mb-pc2500e/
its his business pc so i dont know about flashing his bios.
Answer #1
Have you removed the old ram?
I don’t think you can use two different sized ram in a computer.
And what’s the spec on the ram?
Answer #2
Have you removed the old ram?
I don't think you can use two different sized ram in a computer.
And what's the spec on the ram?
i got the ram from newegg its a PC5300 633mhz DDR2 ram, and yeah like i said i only have it in the pc and it reads the 1gb stick as 512mbs………