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OWC 16GB Replacement for Crucial CT16G48C40U5 - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 16GB Replacement for Crucial CT16G48C40U5 - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U8D51R816GB-B843-SF
  •  
  • $404.99 
  • Free Shipping
OWC 16GB (2x8GB) Replacement for Crucial CT2K8G48C40U5 - DDR5 4800 PC5-38400 CL40 1Rx16 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 16GB (2x8GB) Replacement for Crucial CT2K8G48C40U5 - DDR5 4800 PC5-38400 CL40 1Rx16 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Multi-channel Kit: Dual Channel Kit
  • Recommend Use: Desktops
  • Model #: OWC4U8D51R6016P-B841-SF
  •  
  • $525.33 
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OWC 16GB Replacement for Micron MTC8C1084S1UC48B - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 16GB Replacement for Micron MTC8C1084S1UC48B - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U8D51R816GB-B857-SF
  •  
  • $404.99 
  • Free Shipping
OWC 16GB Replacement for QNAP RAM-16GDR4A0-UD-2400 RAM-16GDR4A1-UD-2400 16GB DDR4 2400 PC4-19200 CL17 2Rx8 288-pin 1.2V Non-ECC UDIMM Memory RAM Module Upgrade
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  • $181.48 
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OWC 16GB Replacement for Kingston KVR48U40BS8-16 - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 16GB Replacement for Kingston KVR48U40BS8-16 - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U8D51R816GB-B852-SF
  •  
  • $404.99 
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OWC 4GB Replacement for QNAP RAM-4GDR4A0-UD-2400 RAM-4GDR4A1-UD-2400 4GB DDR4 2400 PC4-19200 CL17 1Rx8 288-pin 1.2V Non-ECC UDIMM Memory RAM Module Upgrade
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  • $52.48 
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OWC 16GB DDR5 5600 PC5-44800 CL46 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade for Select Desktops
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OWC 16GB DDR5 5600 PC5-44800 CL46 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade for Select Desktops
  • CAS Latency: CL46
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC5U6D51R816GB-B977-SF
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  • $428.99 
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OWC 8GB (2x4GB) DDR3L 1866 PC3L-14900 CL13 1Rx8 240-pin 1.35V ECC Unbuffered UDIMM Memory RAM Module Upgrade Kit for Select Desktops, Workstations, or Servers
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OWC 8GB (2x4GB) DDR3L 1866 PC3L-14900 CL13 1Rx8 240-pin 1.35V ECC Unbuffered UDIMM Memory RAM Module Upgrade Kit for Select Desktops, Workstations, or Servers
  • CAS Latency: CL13
  • Voltage: 1.35V
  • Multi-channel Kit: Dual Channel Kit
  • Recommend Use: Workstations, Servers, and NAS Systems
  • Model #: OWC1E8T31R8008P-B258-SF
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  • $62.98 
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OWC 32GB Replacement for Crucial CT32G48C40U5 - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 32GB Replacement for Crucial CT32G48C40U5 - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U8D52R832GB-B846-SF
  •  
  • $809.99 
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OWC 16GB Replacement for Samsung M324R2GA3BB0-CQK - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V ECC Unbuffered UDIMM Memory RAM Module Upgrade
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OWC 16GB Replacement for Samsung M324R2GA3BB0-CQK - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V ECC Unbuffered UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Workstations, Servers, and NAS Systems
  • ECC: Yes
  • Model #: OWC4E8D51R816GB-B800-SF
  •  
  • $824.99 
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OWC 32GB Replacement for Hynix HMCG88MEBUA081N HMCG88MEBUA084N - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 32GB Replacement for Hynix HMCG88MEBUA081N HMCG88MEBUA084N - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U8D52R832GB-B849-SF
  •  
  • $809.99 
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OWC 32GB (2x16GB) Replacement for Kingston KVR48U40BS8K2-32 - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 32GB (2x16GB) Replacement for Kingston KVR48U40BS8K2-32 - DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Multi-channel Kit: Dual Channel Kit
  • Recommend Use: Desktops
  • Model #: OWC4U8D51R8032P-B853-SF
  •  
  • $807.54 
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OWC 32GB Replacement for Kingston KVR48U40BD8-32 - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 32GB Replacement for Kingston KVR48U40BD8-32 - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U8D52R832GB-B854-SF
  •  
  • $809.99 
  • Free Shipping
OWC 32GB (2x16GB) DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade Kit for Select Desktops
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OWC 32GB (2x16GB) DDR5 4800 PC5-38400 CL40 1Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade Kit for Select Desktops
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Multi-channel Kit: Dual Channel Kit
  • Recommend Use: Desktops
  • Model #: OWC4U8D51R8032P-B927-SF
  •  
  • $807.54 
  • Free Shipping
OWC 16GB DDR5 5600 PC5-44800 CL46 1Rx8 288-pin 1.1V ECC Unbuffered UDIMM Memory RAM Module Upgrade for Select Workstations or Servers
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OWC 16GB DDR5 5600 PC5-44800 CL46 1Rx8 288-pin 1.1V ECC Unbuffered UDIMM Memory RAM Module Upgrade for Select Workstations or Servers
  • CAS Latency: CL46
  • Voltage: 1.1V
  • Recommend Use: Workstations, Servers, and NAS Systems
  • ECC: Yes
  • Model #: OWC5E6D51R816GB-B972-SF
  •  
  • $854.99 
  • Free Shipping
OWC 32GB Replacement for Samsung M323R4GA3BB0-CQK - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
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OWC 32GB Replacement for Samsung M323R4GA3BB0-CQK - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V Non-ECC UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U8D52R832GB-B860-SF
  •  
  • $809.99 
  • Free Shipping
OWC 32GB Replacement for Samsung M324R4GA3BB0-CQK - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V ECC Unbuffered UDIMM Memory RAM Module Upgrade
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OWC 32GB Replacement for Samsung M324R4GA3BB0-CQK - DDR5 4800 PC5-38400 CL40 2Rx8 288-pin 1.1V ECC Unbuffered UDIMM Memory RAM Module Upgrade
  • CAS Latency: CL40
  • Voltage: 1.1V
  • Recommend Use: Workstations, Servers, and NAS Systems
  • ECC: Yes
  • Model #: OWC4E8D52R832GB-B801-SF
  •  
  • $1,439.99 
  • Free Shipping
Micron 16GB (2x8GB) MTA8ATF1G64AZ-2G6E1 DDR4-21300 UDIMM 1RX8 PC4-2666V-UA2-11 Desktop Memory
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Micron 16GB (2x8GB) MTA8ATF1G64AZ-2G6E1 DDR4-21300 UDIMM 1RX8 PC4-2666V-UA2-11 Desktop Memory
  • CAS Latency: CL19
  • Voltage: 1.20V
  • Buffered/Registered: Unbuffered
  • Model #: MG-UD-8GB-CP4-2666 X2
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  • $197.10 
  • Free Shipping
8GB Micron MTA8ATF1G64AZ-2G6E1 DDR4-21300 UDIMM Desktop Memory 1RX8 PC4-2666V-UA2-11
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8GB Micron MTA8ATF1G64AZ-2G6E1 DDR4-21300 UDIMM Desktop Memory 1RX8 PC4-2666V-UA2-11
  • CAS Latency: CL19
  • Voltage: 1.20V
  • Buffered/Registered: Unbuffered
  • Model #: MG-UD-8GB-CP4-2666
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  • $104.35 
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OWC 1GB DDR2 533 PC2-4200 CL4 1Rx8 240-pin 1.8V Non-ECC UDIMM Memory RAM Module Upgrade for Select Desktops
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OWC 1GB DDR2 533 PC2-4200 CL4 1Rx8 240-pin 1.8V Non-ECC UDIMM Memory RAM Module Upgrade for Select Desktops
  • CAS Latency: CL4
  • Voltage: 1.8V
  • Recommend Use: Desktops
  • Buffered/Registered: Unbuffered
  • Model #: OWC4U2D21R801GB-B955-SF
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  • $37.48 
  • Free Shipping
8GB DDR5 4800MHz PC5-38400 CL40 UDIMM 1Rx16 1.1V 288-Pin DIMM RAM Memory M323R1GB4BB0-CQK
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  • $344.83 
  • Free Shipping
OWC 32GB DDR4 3200 PC4-25600 CL22 2Rx8 VLP 288-pin 1.2V ECC Unbuffered DIMM Memory RAM Module Upgrade for Select Workstations, Servers, and NAS Systems
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  • $569.99 
  • Free Shipping
EP-039 Standard SD SDHC Memory Card Kit Male to SD Female Extension Soft Flat FPC Cable Extender 25cm
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  • $19.98 
  • Free Shipping
EP-009 Micro-SD TF Memory Card Kit Male to SD Female Extension Soft Flat FPC Cable Extender 25cm
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  • $21.30 
  • Free Shipping
Micro-SD TF Memory Card Kit Male to TF Female Extension Soft Flat FPC Cable Extender 25cm
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  •  
  • $19.97 
  • Free Shipping
NGFF M.2 NVMe Host to CFExpress CFB Extension Adapter M2 M-key for CFE Type-B Support R5 Z6 Z7 Memory Card
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  • $21.30 
  • Free Shipping
NGFF M.2 NVMe Host to CFExpress CFB Extension Adapter M2 M-key for CFE Type-B Support R5 Z6 Z7 Memory Card
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  • $21.30 
  • Free Shipping
HyperX FURY 16GB (2 x 8GB) DDR3 1866 (PC3 14900) Desktop Memory Model HX318C10FK2/16
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HyperX FURY 16GB (2 x 8GB) DDR3 1866 (PC3 14900) Desktop Memory Model HX318C10FK2/16

Limited time offer, ends 08/01

  • Model #: WL+C7FW+260720+4190
  •  
  • $164.70 
  • Free Shipping
  • $163.30 - $164.70
DDR5 laptop memory slot to DDR5 desktop adapter card, SO DDR5 to DDR5 high-frequency version
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  • $70.92 - $71.82
DDR5 memory module server detec tion tool, desktop computer motherb oard rep air tester, with extemal indic ator lights
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  • $115.90 - $117.30
HMT41GU6BFR8A-PB 2x8GB (16GB Total) 2Rx8 PC3L-12800U Desktop Memory
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  • $79.45 
  • Free Shipping
Plus 32GB SDHC Class 10 Camera Memory Card r90MB/s Bulk Packaging (2 Pack, 32, GB)
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  • $108.99 
  • Free Shipping
32GB Extreme PRO SDHC UHS-I Memory Card - C10, U3, V30, 4K UHD, SD Card - SDSDXXO-032G-GN4IN
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  • $117.55 
  • Free Shipping
128GB Extreme PRO UHS-I SDXC Memory Card, SDSDXXY-128G-ANCIN
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  • $191.76 
  • Free 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