CORSAIR ValueSelect 4GB 240-Pin DDR3 SDRAM DDR3 1333 Desktop Memory Model CMV4GX3M1A1333C9 Cas Latency: 9 Voltage: 1.5V Timing: 9-9-9-24 Buffered/Registered: Unbuffered Features: Single 4GB Module 1333MHz performance Latency of 9-9-9-24 to maximize system performance 100% Guaranteed compatibility with all Intel and AMD DDR3 platforms