Short, practical answers to the questions people ask before buying memory, written around the live prices on this site rather than a spec sheet. For the numbers themselves, see the UK RAM price index.
8GB, 16GB, 32GB or 64GB: what each size is enough for, and what it costs today.
Updated 11 September 2026They are not interchangeable, DDR4 is cheaper per GB, and the speed gap is smaller than the numbers suggest.
Updated 11 September 2026Check for a slot, read the generation and speed off the fitted module, then buy the match.
Updated 11 September 2026AI accelerators are eating the DRAM supply. Our price index shows how far DDR4 and DDR5 have moved, and how to buy well anyway.
Updated 11 September 2026Usually yes: memory has no moving parts and either passes a test or does not. Here is what the conditions mean and how to check.
Updated 11 September 2026A £60 32GB kit beats a £35 16GB kit. Dividing by capacity is the whole trick, plus the caveats.
Updated 11 September 2026Read what is fitted, confirm the generation and form factor, check the board or laptop manual, then buy the match.
Updated 20 October 202632GB as two sticks at the platform sweet spot, bought by price per gigabyte. The reasoning, and where the money is wasted.
Updated 20 October 2026The best DDR5 kit is the cheapest per gigabyte at the right speed and latency for your platform. How to judge each, with live prices.
Updated 20 October 2026