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Pick a category — every listing is matched to real machines.
How fitment works
Find your exact machine
Search your make and model, or scan your PC to detect it automatically.
We match the right part
Every option is checked against your model and motherboard.
It fits — or it's free
Guaranteed compatible, with free 30-day returns if it doesn't.
Buy the upgrade, not the guesswork
Guaranteed to fit — or it's free to return
Every part is matched to your exact make, model and motherboard from our verified compatibility database.
Don't know your specs? Scan your PC
Our free scanner reads your RAM, storage and CPU in seconds and links you to the upgrades it can take.
Thousands of machines, already mapped
Coverage for 8,000+ motherboards across ~59,000 models — from Dell and HP to custom builds.
Popular computers
Jump straight to guaranteed-compatible upgrades for these models.
Not sure what your PC can take?
Run our free scanner — it detects your exact RAM, storage and CPU in seconds and shows the upgrades that fit. No admin, no account.
Scan my PCThe Seifelden Fit Guarantee
If a part we matched to your model doesn't fit, send it back free within 30 days. That's the whole promise.
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