HP 16GB DDR2-400 vs HP 512MB DDR2-533

Key differences

The HP 16GB DDR2-400 has 15.5 GB more internal memory than the HP 512MB DDR2-533 (16 GB vs 0.5 GB). The HP 512MB DDR2-533 has 133 MHz more memory clock speed than the HP 16GB DDR2-400 (533 MHz vs 400 MHz). Only the HP 16GB DDR2-400 has ECC. Buffered memory type: Registered (buffered) on the HP 16GB DDR2-400, Unregistered (unbuffered) on the HP 512MB DDR2-533.

• Internal memory
  • 16GB DDR2-400:16 GB
  • 512MB DDR2-533:0.5 GB
• ECC
  • 16GB DDR2-400:Yes
  • 512MB DDR2-533:No
• Memory clock speed
  • 16GB DDR2-400:400 MHz
  • 512MB DDR2-533:533 MHz
• Buffered memory type
  • 16GB DDR2-400:Registered (buffered)
  • 512MB DDR2-533:Unregistered (unbuffered)