Lenovo 18496VU, Hardware Maintenance Manual, Page: 55 / 272

Feature Description
Optional memory v 256 MB DDR SDRAM SO-DIMM
(PC2700) card
v
512 MB DDR SDRAM SO-DIMM
(PC2700) card
v
1 GB DDR SDRAM SO-DIMM (PC2700)
card
v
256 MB DDR SDRAM SO-DIMM
(PC2-4200) card
v 512 MB DDR SDRAM SO-DIMM
(PC2-4200) card
v
1 GB DDR SDRAM SO-DIMM
(PC2-4200) card
(maximum of 2048 MB)
Bus architecture v 400 MHz PSB (Processor System Bus)
v
533 MHz PSB
v 333 MHz DDR (Double Data Rate)
SDRAM (Synchronous DRAM) (PC2700)
v
533 MHz DDR-2 (Double Data Rate 2)
SDRAM (Synchronous DRAM)
(PC2-4200)
v
HUB link
v PCI bus
v
LPC bus
Graphic memory
chip
R50e series:
v
Intel 855GM
R51e series:
v
RC410M
R52 series:
v Intel 910GML
v Intel 915GM
v
32 MB DDR SDRAM (ATI M22-32)
v 32 MB DDR SDRAM (ATI M22-64)
v
64 MB DDR SDRAM (ATI M22-64)
CMOS RAM v 242 bytes
(continued)
Product overview
ThinkPad R50e, R51e and R52 Series
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