ECC DDR4 costs about $25 more than the same non-ECC kit.

About $20 to $30 more, or roughly 30% extra for a 32GB kit at the same speed and latency. For example, a 32GB (2x16GB) DDR4-3200 CL22 non-ECC kit might run you $55-65, while the ECC version of the same spec is around $75-85.

The premium is small because ECC DDR4 is actually the standard for servers and workstations — it’s produced in volume. Consumer non-ECC is often cheaper because it’s cut down (no extra chip for error checking) and sold in higher competition. But the price difference isn’t massive unless you’re chasing the lowest-end deals.

If your motherboard and CPU support ECC (usually Ryzen Pro or Intel Xeon/W-series