PNY Anarchy X 16GB (4x4GB) 240-Pin DDR3 SDRAM 2800MHz (PC3-22400) Desktop Memory (MD16GK4D3280012AXR-Z) Memory Type: DDR3 PC Type: desktop Frequency speed (JEDEC): 2800MHz (pc3-22400) Latency (CAS): 12 Speed compatibility: 2800MHz, 2666MHz, 2400MHz