Memory - RAM

RAM (Random Access Memory) is where data the CPU is working with is temporarily stored. More RAM is generally better, although there are diminishing returns and 32-bit versions of Windows only support a maximum of 4GB. Speed, measured in MHz, is another consideration, but most importantly memory needs to be compatible with your motherboard: it'll either be DDR, DDR2, DDR3 or DDR4. Smaller SODIMM modules for laptops and mini PCs and ECC memory for servers are all available in this category.

DDR3L SO-DIMM 1600MHz+ RAM Memory Kits

SODIMM memory is smaller than standard modules, and is used in laptops and mini-PCs. As long as you can access your system's memory slots, you can upgrade it. The kits here come in a range of speeds and capacities, so make sure your system is compatible with the memory you choose.

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DDR4 Single/Dual Channel 2133MHz RAM Memory Kits

DDR4 SDRAM is the fastest and most efficient consumer memory available. It's only compatible with Intel's Haswell E which run in quad-channel and Skylake CPUs which run in dual-channel. The latter is what these modules are designed for, so they're sold in matching kits of two modules for best performance or single modules for a cheap upgrade. These are the most basic kits around, with a speed of 2,133MHz.

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DDR4 Single/Dual Channel 2400MHz RAM Memory Kits

DDR4 SDRAM is the fastest and most efficient consumer memory available. It's only compatible with Intel's Haswell E which run in quad-channel and Skylake CPUs which run in dual-channel. The latter is what these modules are designed for, so they're sold in matching kits of two modules for best performance or single modules for a cheap upgrade. These are the mid-range kits, with a speed of 2,400MHz.

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DDR4 Single/Dual Channel 3000MHz+ RAM Memory Kits

DDR4 SDRAM is the fastest and most efficient consumer memory available. It's only compatible with Intel's Haswell E which run in quad-channel and Skylake CPUs which run in dual-channel. The latter is what these modules are designed for, so they're sold in matching kits of two modules for best performance or single modules for a cheap upgrade. These are the high-end kits, with a speed of at least 3,000Hz.

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Server DDR3 1600MHz RAM Memory Kits

Available as regular DIMMs or SO-DIMMs for micro-servers, these DDR3 modules are designed for servers and are engineered and clocked to provide rock solid stability 24/7. ECC (error correcting code) modules are immune to errors, while registered/buffered sticks reduce memory controller load and ensure additional stability when using many modules together. Motherboards need to support ECC and registered memory for these features to work.

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Server DDR4 2133MHz RAM Memory Kits

DDR4 server memory brings maximum speed and efficiency to Intel's latest quad-channel Xeon platform. Server memory is designed to have rock solid stability 24/7. ECC (error correcting code) modules are immune to errors, while registered/buffered sticks reduce memory controller load and ensure additional stability when using many modules together. Motherboards need to support ECC and registered memory for these features to work.

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