SK hynix HMA81GU6JJR8N-VK 16GB (2x8GB) DDR4 2666 CL19

SK hynix 16 GB DDR4 2666 Kit

This kit contains two unbuffered DIMMs that total 16 GB of DDR4 memory running at 2666 MT/s with CL19 timing. Each module is an 8 GB single-rank part built on a standard 288-pin form factor and operates at 1.2 V. The set is aimed at desktop builders who need a straightforward capacity upgrade for everyday workloads.

Check motherboard DDR4 slot count and maximum speed

Verify that your board has at least two free DDR4 DIMM slots and supports 2666 MT/s operation; slower boards will down-clock the modules automatically. The kit uses unbuffered non-ECC chips, so it requires a consumer desktop platform rather than a server or workstation board that demands registered or ECC memory. No heat spreaders are fitted, so ensure adequate airflow around the memory area.

Steady throughput at rated frequency and voltage

Under sustained load the modules maintain their 2666 MT/s data rate at the standard 1.2 V without requiring additional voltage headroom. The absence of a heat spreader means thermals depend on case airflow, but the low-voltage DDR4 design keeps power draw modest during extended sessions. CL19 latency remains consistent once the memory controller has trained the timings at boot.