ATI Mobility Radeon HD 3470 on Acer aspire 4730ZG Faster clocked HD 3450 and successor of the HD 2400 XT but with DirectX 10.1 and due to the new 55nm process, higher clockspeeds. Avivo HD video functions allow the decoding of HD videos. default of ati radeon 3470 on laptop acer aspire 4730ZG is 256mb, 256mb of memory sharing from ram. if the default 1gb ram hynix DDR2 667 total of sharing become 512MB. now I replace the ram to 2gb, sharing is automatically increased to 1020MB (I use a Kingston DDR2 PC6400). Another experimental change ram to 3GB, sharing memory become 1533 MB. picture of motherboard acer aspire 4730ZG see below. and how to replacing...