HP Compaq Presario,Presario 4620 Supplementary Manual page 3

Presario 4600
Memory Upgrade Chart
I/O BOARD
SPARE PART 311009-001
A MAXIMUM OF 256 MB TOTAL MEMORY
SYSTEM IS UPGRADABLE TO 256MB USING 16, 32, 64, and 128MB DIMMS.
16-MB SDRAM, - OPTION PN 271433-001
32-MB SDRAM, - OPTION PN 271343-001
3-30 Volume Two