Kingston KVR533D2N4/512 D2-533 512M/64x64 Memory
Specifications:

Mfr Part Number: KVR533D2N4/512
Type: DDR2 (SDRAM-DDR2, 1.8V, CL4)
Capacity: 512MB
Speed: PC2-4200 533MHz
Size & bit: 64M x 64
Pins: 240pin
ECC: No
Registered: No