Where’s the best place to buy DDR4 SO-DIMM RAM for a Lenovo ThinkCentre Mini?

Look for a matching Samsung or other reputable-brand DDR4 SO-DIMM on eBay. Several people have upgraded Lenovo Tiny and Mini systems that way without problems. Before ordering, confirm the required capacity, speed, voltage, form factor, and whether the system supports mixed modules.

eBay is probably the best place to look, especially if you’re open to used RAM. Try to buy from an individual seller with clear photos and a good history rather than a bulk refurbisher selling salvaged parts. DDR4 is no longer being produced, so new retail kits can be surprisingly expensive.

Marketplace listings are often cheaper than stores, but test the memory as soon as it arrives. Check the ThinkCentre’s existing module and system specifications first so you get the right DDR4 speed and capacity. If you want a return policy and guaranteed testing, a reputable retailer may be worth paying extra for.

Check PCPartPicker to compare current listings across several reputable vendors. It’s useful for seeing whether a retailer’s price is reasonable, although DDR4 SO-DIMMs may cost more than expected because supply is tightening.