HP 256MB DDR2-553 vs HP 4GB DDR2-400

Key differences

The HP 4GB DDR2-400 has 3.75 GB more internal memory than the HP 256MB DDR2-553 (4 GB vs 0.25 GB). The HP 256MB DDR2-553 has 133 MHz more memory clock speed than the HP 4GB DDR2-400 (533 MHz vs 400 MHz). Memory layout (modules x size): 1 x 0.25 GB on the HP 256MB DDR2-553, 2 x 2 GB on the HP 4GB DDR2-400.

• Internal memory
  • 256MB DDR2-553:0.25 GB
  • 4GB DDR2-400:4 GB
• Memory layout (modules x size)
  • 256MB DDR2-553:1 x 0.25 GB
  • 4GB DDR2-400:2 x 2 GB
• Memory clock speed
  • 256MB DDR2-553:533 MHz
  • 4GB DDR2-400:400 MHz