The sticker on the 512MB module in my BeoMedia 1 reads as follows:
Hynix PC3200U-30330 0642
Korea 09 512MB DDR 400Mhz CL3
HYMD564646CP8J-D43 AA-C
When I looked it up on Hynix website and downloaded the 2002 Part Number Decoder for DDR SDRAM Modules here is how it reads:
HYM - Hynix Module
D5 - 512Mb DDR SDRAM (Component Group)
Blank - VDD 2.5V & VDDQ 2.5V (Power Supply & Interface)
64 - 64M (Memory Depth)
Blank - 184pin Unbuffered DIMM (Module Type)
64 - x64 (Data Width)
6 - 8K Ref. / 4Banks ( Refresh / Banks)
C - 4th Gen. (Die Generation)
Blank - Normal (Power Consuption)
None - TSOP (Package Type)
P - Lead free (Package Material)
8 - x8 Based (Component Configuration)
J - DDR333 DIMM (Module Type)
D43 - DDR400 3-3-3 (Speed)
BeoVision 4-50 MkII, BeoSystem 1, Zektor Switch, DTS box, BeoLink Passive, BeoVox Cona, BeoLab 1, BeoLab 3500, BeoLab 6000, BeoLab 4000, BeoLab 4, BeoLab 3000, BeoMedia 1, BeoMaster 5, BeoSystem 3 Type 9621