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326666-041 Hewlett-Packard DDR 128MB PC-3200 Non ECC 400Mhz RAM Memory
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  • $22.77 
  • $39.99 Shipping
Rimlance 32GB (2X16GB) 1.2V DDR4 2133MHz PC4-17000 UDIMM 2RX8
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Rimlance 32GB (2X16GB) 1.2V DDR4 2133MHz PC4-17000 UDIMM 2RX8
  • CAS Latency: CL15
  • Multi-channel Kit: Dual Channel Kit
  • Chipset: Major Brand Chipset
  • Buffered/Registered: Unbuffered
  • Model #: RUD17000D8C2K32
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  • $231.22 
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Samsung 1GB 2x512MB M378T6553CZP-CCC PC2-3200 DDR2 RAM Desktop Memory 400MHz
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  • $51.23 
  • $39.99 Shipping
HYNIX MEM DIMM 1GB PC2-5300 CL5 PB-FREE
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SK hynix
HYNIX MEM DIMM 1GB PC2-5300 CL5 PB-FREE
  • CAS Latency: CL5
  • Model #: HYMP112U64CP8-Y5
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  • $33.35 
  • $39.99 Shipping
404574-888 HP 1GB 800MHz PC2-6400 CL6 DDR2 SDRAM DIMM HP memory
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  • $28.46 
  • $39.99 Shipping
Genuine Samsung M378B5773DH0-CK0 Computer Memory 2GB 1Rx8 PC3-12800U 655409-150
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  • $21.63 
  • $39.99 Shipping
cron 1Gb Dimm Pc2-4200 533Mhz 2Rx8 Non-Ecc 240 Pin
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  • $35.29 
  • $39.99 Shipping
200U Ddr2 533Mhz Cl4 240 Pin Dimm M378T6553Cz3-Cd5
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  • $68.31 
  • $39.99 Shipping
Kingston 1GB DDR SDRAM Memory Module
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  • $34.48 
  • $39.99 Shipping
U non-ECC 133 MHz CL2 'Micron MT8LSDT1664AG-13EB1'
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  • $62.62 
  • $39.99 Shipping
HYNIXHynix Hmt125U6Tfr8C-H9 Hynix Memory Module-Hmt125U6Tfr8C-H9
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  • $47.01 
  • $39.99 Shipping
PC2700(333) UNBUF 2.5v 1RX8 184P 32MX64 32mX8 CL2
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  • $28.46 
  • $39.99 Shipping
SAMSUNG M378A5143Db0-Cpb  Memory For Desktop Memory-M378A5143Db0-Cpb
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  • $50.79 
  • $9.99 Shipping
SK hynix 4GB PC4-2133 DDR4-2133 HMA451U6AFR8N-TF Desktop PC Memory 288p
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SK hynix
SK hynix 4GB PC4-2133 DDR4-2133 HMA451U6AFR8N-TF Desktop PC Memory 288p
  • CAS Latency: CL15
  • Voltage: 1.20V
  • Buffered/Registered: Unbuffered
  • Model #: XD-UD-4GB-CP4-2133
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  • $50.79 
  • $9.99 Shipping
Kingston 512MB DDR2 SDRAM Memory Module
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Kingston 512MB DDR2 SDRAM Memory Module
  • Buffered/Registered: Registered
  • Model #: KTH-XW8200/512
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  • $28.75 
  • $39.99 Shipping
M378T3253FG0-CCC:SAMSUNG 256MB PC2-3200 CL3 DDR2-400 240-PIN
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SAMSUNG
M378T3253FG0-CCC:SAMSUNG 256MB PC2-3200 CL3 DDR2-400 240-PIN
  • CAS Latency: CL3
  • Model #: M378T3253FG0-CCC
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  • $22.77 
  • $39.99 Shipping
Ddr2 Dimm 512Mb(2X256Mb) Kit 667Mhz Pc2-5300U Non-Ecc 1Rx16 3777
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  • $56.93 
  • $39.99 Shipping
Dell 8WKDY Samsung M393A4K40CB2-CVF 32GB 2Rx4 PC4-2933Y Server Memory DDR4 DIMM
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  • $591.08 
  • $9.99 Shipping
HP 256MB DDR SDRAM Memory Module
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HP
HP 256MB DDR SDRAM Memory Module
  • ECC: Non-ECC
  • Model #: 305957-041
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  • $51.23 
  • $39.99 Shipping
HP 256MB DDR SDRAM Memory Module
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  • $39.85 
  • $39.99 Shipping
HP 512MB DDR2 SDRAM Memory Module
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HP
HP 512MB DDR2 SDRAM Memory Module
  • ECC: Non-ECC
  • Model #: 377725-888
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  • $28.46 
  • $39.99 Shipping
SAMSUNG M378T2953Ez3-Cf7  Memory Module-M378T2953Ez3-Cf7
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SAMSUNG
SAMSUNG M378T2953Ez3-Cf7 Memory Module-M378T2953Ez3-Cf7
  • ECC: Non-ECC
  • Buffered/Registered: Unbuffered
  • Model #: M378T2953EZ3-CF7
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  • $44.40 
  • $39.99 Shipping
HP 256MB SDRAM Memory Module
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HP
HP 256MB SDRAM Memory Module
  • Model #: 127005-031
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  • $105.70 
  • $39.99 Shipping
Samsung Memory Module
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SAMSUNG
Samsung Memory Module
  • Model #: M395T2953CZ4-CE61
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  • $44.40 
  • $39.99 Shipping
SAMSUNG M395T5160Cz4-Ce66  Memory Module-M395T5160Cz4-Ce66
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  • $31.88 
  • $39.99 Shipping
Hynix HMA41GR7AFR8N-TF 8GB DDR4 SDRAM  288-Pin DIMM RAM
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SK hynix
Hynix HMA41GR7AFR8N-TF 8GB DDR4 SDRAM 288-Pin DIMM RAM
  • CAS Latency: CL15
  • Voltage: 1.20V
  • ECC: Yes
  • Part Number: HMA41GR7AFR8N-TF
  • Model #: 1a8-543241000401780
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  • $87.08 
  • $9.99 Shipping
Hynix HYMP112U64CP8-Y5 1x1GB PC2-5300 667Mhz DDR2 UDIMM Desktop Memory RAM TESTED 1.8V
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Refurbished Hynix HYMP112U64CP8-Y5 1x1GB PC2-5300 667Mhz DDR2 UDIMM Desktop Memory RAM TESTED 1.8V
  • CAS Latency: CL5
  • Voltage: 1.8V
  • Multi-channel Kit: Dual Channel Kit
  • Chipset: Major Brand Chipset
  • Model #: HYMP112U64CP8-Y5
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  • $11.92 
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(HYMP512U64CP8-S6)1GB 2Rx8 PC2-6400U
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(HYMP512U64CP8-S6)1GB 2Rx8 PC2-6400U
  • Model #: HYMP512U64CP8-S6
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  • $33.02 
  • $39.99 Shipping
Kingston KVR16S11K2/16  16GB 1600MHz DDR3 Non-ECC CL11 SODIMM (Kit of 2)
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  • $87.08 
  • $9.99 Shipping
Hynix HMA81GU6JJR8N-VK 8GB Memory Module - DDR4 - 2666 MHz - 288-Pins - PC4-21300 - Unbuffered Non-ECC - CL19 - 1.2 Volts
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  • $97.16 
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G.SKILL Ripjaws M5 RGB Series 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6000 (PC5 48000) Desktop Memory
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G.SKILL
G.SKILL Ripjaws M5 RGB Series 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6000 (PC5 48000) Desktop Memory
  • CAS Latency: CL36
  • Voltage: 1.35V
  • Multi-channel Kit: Dual Channel Kit
  • Timing: 36-36-36-96
  • Model #: F5-6000J3636F32GX2-RM5NRK
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  • $1,669.99 
  • $10.99 Shipping
Micron MTA36ASF4G72PZ-2G9J3 32GB DDR4-2933 LP ECC RDIMM
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  • $460.04 
  • $9.99 Shipping
HP 655409-571 2Gb 1 X 2Gb 1600Mhz Pc312800 Cl11 Nonecc Unbuffered Single Rank Ddr3 Sdram Dimm
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  • $61.59 
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SAMSUNG M378B5773Ch0-Ch9  Memory
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SAMSUNG M378B5773Ch0-Ch9 Memory
  • Model #: M378B5773CH0-CH9
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  • $44.74 
  • $9.99 Shipping
2x4GB (8GB Total) HYNIX HMT351U6CFR8C-PB 4GB PC3-12800U Desktop Memory
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  • $58.86 
  • $9.99 Shipping

Desktop Memory

System memory is where a computer holds the programs and data that are currently in use. The definition of the word "memory" has become somewhat blurred over the years because there are different types of memory that a computer uses. In general, "memory" refers to the system memory, or RAM, which holds instructions that the processor uses, and the data the instructions work with.

System memory is directly related to the performance of your computer. In some ways, it's even more important than the processor, because without enough memory, your processor cannot work to its full potential. Newer programs require more memory than older ones, so when buying a new computer, get the most memory that you can afford.

Learn about Types of System Memory

There are many different types of system memory available. Researching them will help you make an informed choice when you purchase your computer. Getting the right kind of memory for your system will also affect whether you can upgrade it later on, and by how much. With the right memory, you can move it from one system to another, or continue to use the same memory even after you upgrade your motherboard.

Types of memory include 168-pin SDRAM, 184-pin DDR SDRAM, 240-pin DDR2 SDRAM, and 240-pin DDR3 SDRAM. Capacity typically ranges from 128MB to 2GB with speeds covering PC 100, PC 133, PC 2100, PC 2700, PC 3200, PC 4000, PC2 3200, PC2 4200, PC2 5300, PC2 5400, PC2 6400, PC2 8000, PC2 8500, PC2 8800, PC2 8888, PC2 9136, PC2 9200, PC2 9600, PC2 10000, PC2 10400, PC3 8500, PC3 10600, PC3 10666, PC3 10700, PC3 12800, PC3 13000, PC3 14400, PC3 15000, and so on.

Bestselling Desktop Memory Reviews:

Sean P.
7/18/2026 11:05:08 AM
Nice and Colorful

“ This memory is great for my use case. ”

Team T-Force Delta RGB 32GB (2 x 16GB) 288-Pin PC RAM DDR4 3200 (PC4 25600) Desktop Memory Model TF3D432G3200HC16FDC01
Anonymous
7/2/2026 7:37:22 AM
Consistent reliable memory

“ Solid, no-frills RAM that just works. ”

Team T-FORCE VULCAN Z 16GB (2 x 8GB) 288-Pin PC RAM DDR4 3200 (PC4 25600) Desktop Memory Model TLZGD416G3200HC16CDC01
MICHAEL G.
7/1/2026 9:44:35 AM
Pricey, even for old RAM, but works.

“ Okay ram. ”

G.SKILL Ripjaws V Series 16GB (2 x 8GB) 288-Pin PC RAM DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C16D-16GVKB
Brian
6/19/2026 12:22:46 PM
Man, did I get lucky.

“ Got this last April, just before DDR4 prices also went through the roof. ”

G.SKILL Ripjaws V Series 64GB (4 x 16GB) 288-Pin PC RAM DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C16Q-64GVK
Joel H.
6/18/2026 10:15:33 AM
The RAM is too dang high!

“ It's DDR5 and works fine ”

CORSAIR Vengeance RGB 32GB (2 x 16GB) 288-Pin PC RAM DDR5 6000 (PC5 48000) Desktop Memory Model CMH32GX5M2B6000C38