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a question about DRAM specifications?

i want to upgrade my laptop RAM from 2 GB to 4 GB. However, i have also heard that certain specifications must be satisfied. My current RAM is 2Rx8 PC2-5300S-555. Can anyone tell me what these numbers represent and what specs must be the same for RAM upgrades?

Your RAM type is DDR2 667MHz, as mentioned on the PC2-5300S (”S” stands for SO-DIMM or [Small Outline - Dual In-line Memory Module], which means a smaller alternative of the usual DIMM RAMs and is used for mostly laptops).

You can buy a more higher clock such as 800MHz or 1066MHz, as long as it is DDR2 SO-DIMM type.

[You should beware of where you post your question too. This is Desktop section, not Laptop :p]

HP Blackbird 002 Upgrade = 300 fps in CoD4

Cisco 3725 128MB DRAM Upgrade, MEM3725-128D $27.32

Cisco 2650 Series 64MB DRAM Upgrade, MEM2650-64D $38.48

Cisco 820 Series 16MB DRAM Upgrade, MEM820-16D $22.26

Cisco 3660 Series 32MB DRAM Upgrade, MEM3660-32D $25.30

Cisco 2851 512 MB DRAM Memory Upgrade, MEM2851-512D $81.06

Cisco 2500 Series 16 MB DRAM Upgrade, MEM-1X16D $23.27

Cisco 3660 Series 256MB DRAM Upgrade, MEM3660-2X128D $67.88

CV0011027 ARN 32MB DRAM F/ ARN ROUTERS UPGRADE 109522 $45.63

Cisco 3660 Series 128MB DRAM Upgrade, MEM3660-128D $38.48

Cisco 3600 Series 16MB DRAM Upgrade, MEM3600-16D $19.21

Cisco 2500 Series 8 MB DRAM Upgrade, MEM-1X8D $18.20

4MB DRAM upgrade for Cisco 2500 Series Routers MEM-1X4D $8.06

Cisco 2801 256 MB DRAM Memory Upgrade, MEM2801-256D $55.71

Cisco 2821 512MB DRAM Upgrade, MEM2821-512D $67.88

Cisco 2821 1GB DRAM Upgrade (2x512), MEM2821-256U1024D $130.74

Cisco 3745 256MB DRAM Upgrade, MEM3745-256D $84.10

Cisco AS5350 256MB DRAM Upgrade, MEM-256M-AS535 $49.63

Cisco 7200 Series 256MB DRAM Upgrade MEM-SD-NSE-256M $67.88

Cisco 3800 Series 256MB DRAM Upgrade, MEM3800-256D $57.74

Cisco 7200 Series 1GB DRAM Upgrade, MEM-NPE-G2-1GB $81.06

Cisco MC3810 Series 64MB DRAM Upgrade, MEM-381-1X64D $45.57

Cisco 3620 64MB DRAM Upgrade Kit (4x16), MEM3620-16U64D $67.88

Cisco 3800 Series 1GB DRAM Upgrade MEM3800-256U1024D $152.03

768MB (512MB) DRAM Upgrade Cisco 2811 MEM2811-256U768D $47.65

CISCO MEM-SUP720-SP-1GB 64MB DRAM UPGRADE FOR SUP1 $190.11

128 to 192 SODIMM DRAM $33.51 Cisco 128 to 192MB SODIMM DRAM upgrade for Cisco 2801

EDGE Tech 32 MB DRAM Memory Module 32MB DRAM C4143A-HPP-1-PE $32.11 edge s dram-based memory product line offers upgrade solutions for desktops notebooks servers printers hubs and routers. edge s dram-based memory product line offers upgrade solutions for desktops notebooks servers printers hubs and routers.

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EDGE Tech 128 MB DRAM Memory Module - 128MB - DRAM - 72-pin SIMM $123.45 edge s dram-based memory product line offers upgrade solutions for desktops notebooks servers printers hubs and routers.

EDGE Tech 64MB EDO DRAM Memory Module - 64MB - 66MHz PC66 - EDO DRAM - 72-pin SIMM $55.94 edge s dram-based memory product line offers upgrade solutions for desktops notebooks servers printers hubs and routers

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EDGE Tech 32MB DRAM Memory Module - 32MB - DRAM SIMM $48.67 edge memory products provide maximum power speed quality and reliability. peripheral s trademarked distinctive blue edge is our assurance to users that they have purchased a high quality memory upgrade that meets or exceeds the oem s specifications and has passed our rigorous quality control processes.