why is this so cheap?

[sheky]

found this off price watch, its 2x1gb pc4200 DDR2, 533 MHz, non-ECC, 240-pin, unbuffered, CL4. Matched Kit. LIFETIME WARRANTY! no heat sink but whatever

heres the link:
cheap deal

 

[SHAWN]

Thats not really that cheap when 1gb ddr400 is around $100

 

[sheky]

wait, which is better? ddr400 or pc4200 ddr2... the ddr2 right?

 

[DJ-CHRIS]

Well it's more complex than that

AMD uses DDR only, and Intel uses DDR and DDRII

However due to AMD's memory controller and Hypertransport, AMD with DDR PC3200 outpeforms a Intel with DDR II 533

 

[timmer]

well thats cause ddr2 isnt all its was cracked up to be but there is some good stuff dont get the 533 get the 667 or something i forget what exactly it is and dont get the value stuff if u plan on overclocking
and 215$ isnt all that cheap