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Guaranteed-fit promise
Every part is matched to your machine's slots and drive bays and checked against its published specs before we list it.
DDR4 · SO-DIMM · up to 2400 MT/s
4×16GB = 64GB
Verified fit for your system$383.98
In stock — ships within 1 business day
≈ $6.00/GB · 64GB total after upgrade
Every option here is verified to fit this system. Muted means it fits too — we just don't stock it right now. Pick one to switch.
SATA 2.5" SSD · SATA M.2 2280 SSD · SATA 2.5" Hard Drive
SATA 2.5" SSD · 256 GB
Spec-matched to your systemNot stocked right now. It still matches your system's specs— get an email the moment it's back.
Every drive here matches this system's published specifications. Pick a drive type, then a capacity. Muted means it fits too — just not stocked right now.
How we know SATA 2.5" SSD fits
Software for your upgrade — matched to your Medion X7851.
Checks the drivers on your Medion X7851, installs the safe updates Windows offers, guides the rest to the official download — and confirms exactly which of the upgrades above your machine has room for.
Complete your upgrade. This machine takes both memory and storage — add one from each tab above to do it in one order.
Medion X7851 takes DDR4 SODIMM memory, 4 slots, up to 64 GB. Every option above matches those requirements, so it typically installs and runs without any firmware change.
“Verified fit” means the exact module was confirmed compatible against the manufacturer’s system scanner.
Specifications reported for the Medion X7851.
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