3 Reasons to Buy a 2x8GB Kit Instead of Mixing Two Kits
Memory controllers are picky Even two identical kits can have subtle differences in chips or timings, causing random crashes or boot failures.
Four sticks stress the memory controller more Running four sticks puts extra strain on the controller, especially on older or budget motherboards, often forcing slower speeds.
A single kit is cheaper and leaves room to upgrade 2x8GB costs less per gigabyte than two 2x4GB kits and leaves two slots open for future expansion.