HP 512MB DDR2-533 vs HP 8GB DDR-400

Key differences

The HP 8GB DDR-400 has 7.5 GB more internal memory than the HP 512MB DDR2-533 (8 GB vs 0.5 GB). The HP 512MB DDR2-533 has 56 -pin DIMM more memory form factor than the HP 8GB DDR-400 (240-pin DIMM vs 184-pin DIMM). The HP 512MB DDR2-533 has 133 MHz more memory clock speed than the HP 8GB DDR-400 (533 MHz vs 400 MHz). Only the HP 8GB DDR-400 has ECC. Internal memory type: DDR2 on the HP 512MB DDR2-533, DDR on the HP 8GB DDR-400.

• Internal memory
  • 512MB DDR2-533:0.5 GB
  • 8GB DDR-400:8 GB
• Internal memory type
  • 512MB DDR2-533:DDR2
  • 8GB DDR-400:DDR
• Memory form factor
  • 512MB DDR2-533:240-pin DIMM
  • 8GB DDR-400:184-pin DIMM
• ECC
  • 512MB DDR2-533:No
  • 8GB DDR-400:Yes
• Memory clock speed
  • 512MB DDR2-533:533 MHz
  • 8GB DDR-400:400 MHz
• Buffered memory type
  • 512MB DDR2-533:Unregistered (unbuffered)
  • 8GB DDR-400:Registered (buffered)