Claim: Radeon R100 series, the first generation of Radeon graphics chips from ATI Technologies, had its first version which is the Radeon DDR which was a core speed of 183Mhz.
Evidence: The Radeon R100 is the first generation of Radeon graphics chips from ATI Technologies. The core speed was 183Mhz and the 5.5 Ns DDR SDRAM memory clock speed was 183 MHz DDR (366 MHz effective).