Compatibility checker
The one question that matters before you order memory. Answer one or two questions below and get a straight answer for every kit we sell — including the ones that will not fit.
1 — Select your CPU platform
Not sure which platform you have? On Windows, press Win+R, run msinfo32, and read the Processor line — then match the CPU generation to a platform above. Or just type your motherboard or CPU model in step 2.
2 — Optional: your motherboard or CPU model
The guarantee on the four-DIMM DDR5 Pro 192 GB and 256 GB kits: if Flowfinds approves your submitted system and the RAM does not operate at the guaranteed configuration, Flowfinds pays the return cost and provides a replacement or refund. Where we have not validated a platform we say so rather than guessing. Full terms.
The quick check above answers one question: does the generation fit. For a recommendation — which kit, at what capacity, and what we are willing to guarantee on your machine — fill in the questionnaire below.
This tool covers the common desktop platforms of the DDR4 and DDR5 era. It is deliberately conservative: where your board could be either memory type, it says so instead of guessing. The final authority on your machine is its motherboard manual or the board maker's specification page — thirty seconds there beats a return shipment. Still unsure? Send us the exact model and we confirm before you pay.
Specialist recommendation
Nine questions. Out comes one recommended kit, a cheaper option and an upgrade option, each with the reason — plus how certain we are, on a five-level scale, and what we are prepared to guarantee. Nothing is auto-detected from your browser: a web page cannot read your motherboard, and anything claiming otherwise is guessing.
The five certainty levels. Level 1 — Flowfinds Validated: bench-tested on your exact board, CPU and BIOS. Level 2 — Platform Validated: bench-tested on your CPU platform, not your exact board revision. Level 3 — Specification Compatible: generation, form factor, slots and capacity all match; a specification match, not a bench result on your machine. Level 4 — Manual Review Required: a person checks it before you buy. Level 5 — Not Recommended: it cannot work and we will not sell it. Levels 1 and 2 require a published bench record for your platform. We have none yet, so this tool cannot currently return them — the validation matrix is empty until real testing fills it. Every answer here is Level 3, 4 or 5.
The rule behind the answers
Every desktop board is built for exactly one memory generation. This is physical, not a settings problem.
Desktop DDR4 and DDR5 modules both have 288 pins, but the notch in the connector edge sits in a different position. A module of the wrong generation physically cannot seat in the slot — and forcing it damages both.
DDR4 runs at a 1.2 V standard voltage; DDR5 runs at 1.1 V and moves power regulation onto the module itself. The signalling is incompatible. No adapter, BIOS update or setting bridges the two.
Your CPU platform decides the question for you on AM4, AM5, LGA1200 and LGA1851. Only Intel's LGA1700 came in both flavours — those boards take DDR4 or DDR5 depending on the specific board version.
Physical fit
Memory height only becomes a question when a large air cooler hangs over the memory slots. Most single-tower coolers and all liquid coolers clear standard-height modules with room to spare.
A bare UDIMM PCB is 31.25 mm; the spreader height on top of that varies by batch. If your build is tight on clearance, ask us before ordering — we measure the kit that would ship to you.