Apacer 8GB DDR4 2666MHz Desktop Memory – 8GB DDR4 SDRAM module operating at 2666MHz (PC4-21300) with CAS latency timings of 19-19-19-40. Features a 288-pin DIMM form factor, non-ECC, unbuffered single rank design. Offers a transfer speed of up to 2,133 Mbps, Backed by a 3-year limited warranty.