Every kit is ranked by real cost per gigabyte (£/GB) — its current Amazon.co.uk price divided by its total capacity. A 2x8GB kit counts as 16GB, not 8GB. We never rank by commission, popularity, or brand.
A £60 32GB kit is better value than a £35 16GB kit even though it costs more — dividing by capacity is the only fair way to compare kits of different sizes and brands on one scale. See price per GB explained for the full reasoning.
Prices and price history come from Keepa, which tracks Amazon.co.uk pricing continuously. Our catalogue refreshes daily; every product page shows its own price history and how many days old that history is.
We track a large slice of Amazon's UK memory category but not literally everything, and we deliberately exclude listings that aren't actual memory modules — whole PCs, flash drives, memory-card readers and the like that Amazon's category listing sometimes turns up alongside real RAM. If a genuine kit seems to be missing, let us know.
Amazon Warehouse sells Amazon's own returned or open-box stock at a discount, graded by condition. RAM has no moving parts, so a Warehouse kit that boots and passes a memory test is as good as new. See Amazon Warehouse RAM explained.
We're an independent site funded by the Amazon Associates programme — when you buy via one of our links we may earn a small commission, at no extra cost to you, and this never affects the ranking. Full detail in our affiliate disclosure.
Please get in touch with the product name or link and what looks wrong. We read every message.
No — DDR4 usually undercuts DDR5 per gigabyte, and if your board only takes DDR4 there's no upgrade path that needs DDR5 anyway. See DDR4 vs DDR5 for a full comparison.