Yes, if you plug it into the right slot.

The moment your motherboard detects two identical sticks in the correct slots (usually slots 2 and 4 or 1 and 3, check your manual), it enables dual-channel. No BIOS tweaks needed. Just shut down, install, boot up.

Dual-channel is free performance—5-15% faster in memory-bound tasks like gaming, rendering, or file compression. A single stick is leaving that on the table.

But “immediate” assumes the new stick matches your old one in speed, timings, and rank. Mixing brands or spec-sets can still work, but it might drop to single-channel or run at the slower stick’s defaults. Best bet: buy the exact same model you already have.

Plug it in, verify with CPU-Z or Task Manager. If it says “Dual” under memory channels, you’re good. If not, re-seat or swap slots.

You’ll feel the bump the first time you load a big game.