Lenovo ThinkPad R50e Hardware Maintenance Manual - Page 55
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Product overview Feature Optional memory Bus architecture Graphic memory chip CMOS RAM Description 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) 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 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) v 242 bytes (continued) ThinkPad R50e, R51e and R52 Series 49
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