256mb

I just got Powercolor Radeon 9600XT 256MB. I know that it has a Core clock of 500Mhz and Memory clock of 400Mhz. Now when i go into 3DMARK03 and check my graphic card capabilities, i saw a Core clock of 399.9Mhz (which is correct) and Memory clock of 202.5Mhz (this is wrong). What gives? Any ideas?