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RAM Buying Guide: Choosing the Right Module

A memory module is chosen above all on its capacity and its clock speed, the two measures that truly separate listings from one another. Price follows naturally from these two criteria, to be weighed against the actual use of the machine.

What to check

Capacity: how much memory is available This criterion measures the internal memory of the module, expressed in gigabytes. The greater the capacity, the more data the machine can keep open at once without slowing down. On the site, the rating bar lengthens with capacity: the most modest listings sit near the low benchmark recorded on the market, the median matches everyday use, and the best listings reach the high benchmark, reserved for the most demanding tasks. A capacity that is too tight forces the machine to rely on storage, which slows everything down. Market median: 28 GB
Speed: the module’s clock frequency This criterion measures the operating frequency of the module, expressed in megahertz. A higher frequency speeds up data transfers between memory and processor, which is most noticeable on demanding tasks. The benchmarks recorded on the market range from a low frequency, through a median frequency matching most modules, up to a high frequency reserved for the most capable setups. A high score on this criterion signals a module able to keep up with a fast processor without creating a bottleneck. Market median: 3,200 MHz
Compatibility and installation Before buying, check that the module’s form factor matches the motherboard’s connector type and that the stated frequency is actually supported by it. Installation itself requires no special tool: the module clips into its slot once the device is switched off and unplugged. To fully benefit from a module’s speed, it is best to install identical pairs of sticks whenever the motherboard allows it, in order to enable dual channel operation.

Benchmarks based on 30 recent market listings, collected on 2 October 2026.

What you get for each budget

Under €40

At this price level, capacity stays close to the low benchmark recorded on the market, enough for everyday office use or a one off upgrade.

€40 to €90

This range covers most everyday uses, with capacity close to the median and a frequency that keeps up with a recent processor without difficulty.

Over €90

Beyond this, capacity and frequency move closer to the best benchmarks recorded, for the most demanding computing or editing tasks.

Frequent mistakes

Picking too low a capacity forces the machine to compensate with storage, which is far slower.
Installing a module whose frequency exceeds what the motherboard supports brings no real benefit.
Mixing modules of different capacities or frequencies often prevents dual channel operation from working.
Overlooking form factor compatibility with the motherboard connector makes the module simply unusable.

Models in this category

Best rated first, among those our merchants offer.

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