At first I started to think the MHz value is just multiplied by 2 to get the data transfer rate of RDRAM, but then in the same article they mention certain RDRAM chips don't follow that rule. Namely on, PC600 RDRAM runs at 266 MHZ, while PC800 RDRAM runs at 400MHZ.
Link to the article
So, what's the correct formula for calculating transfer rate? Multiplying by 2 seems accurate in some cases but not all,