You can use Oda's CPU utility, but if it's an ASUS A7V133 MB, it runs on DDR always.
Since your CPU is a 200 Mhz FSB, that means it's running at 100 Mhz x2 (DDR). The Bios will state 100 Mhz for the FSB and RAM, but for the CPU it's actually that setting x2. For example, if you set it to 105 Mhz, your RAM will run at 105 Mhz and your FSB will run at 210 Mhz (105 DDR).