4GB RAM
4GB is no longer enough for a general-purpose Windows machine. Windows 11 alone wants more, and a browser with a dozen tabs will exhaust it, at which point the system starts using the drive as memory and everything slows down.
Where a 4GB module still makes sense is narrow but real: filling a second slot on an older machine that has one 4GB stick, to enable dual-channel operation and use both channels; repairing a legacy desktop, thin client or point-of-sale terminal; or a single-purpose machine running one light application.
For anything else, 8GB is the absolute floor and 16GB is the sensible target — and the price difference at these capacities is small enough that it is rarely worth economising.
When matching a module, check three things against your existing memory or motherboard manual: DDR4 or DDR5, speed in MT/s, and DIMM for desktop or SO-DIMM for laptop.
See desktop DDR4 RAM for larger modules and matched kits.
Kingston ValueRAM 4GB DDR4 2666MT/s
In stock
ADATA 4GB DDR4 2666 MHz Memory Module
In stock
4GB RAM Buying Guide and FAQ
This 4GB RAM range covers kits at this capacity. Below we answer the common questions about how much memory you need and how to choose.
Is 4GB of RAM enough?
For most modern gaming, 4GB is on the low side for gaming today, so consider 16GB or 32GB unless this is for a basic or office PC. Heavy video editing, 3D or virtual machines are where larger kits earn their place.
Should I buy 4GB as one stick or a matched kit?
Buy 4GB as a matched dual-channel kit (for example two sticks) rather than a single module. Running in dual channel gives noticeably better performance, especially in games, and a matched kit avoids mixing modules that may not play nicely together.
Will this 4GB memory fit my PC?
Check the memory type first: DDR5 only fits DDR5 boards and DDR4 only fits DDR4 boards. Then enable the EXPO or XMP profile in the BIOS so the kit runs at its rated speed rather than the slower default. Your motherboard support list shows tested kits.
What is the best value 4GB RAM?
The best value is a matched 4GB kit at a sensible speed for your platform, such as DDR5-6000 CL30 on a modern AMD build. Pay for capacity and a solid rated speed rather than flashy extras, and make sure it matches your board.