128MB DDR2ram - its correct? MegaByte, not Megabit? Wrtnode 1 in specification say - 512Mb - Megabit /8 = 64MB (twice smaller), and not have a shield in shipping list, but price is...

128MB DDR2ram - its correct? MegaByte, not Megabit? Wrtnode 1 in specification say - 512Mb - Megabit /8 = 64MB (twice smaller), and not have a shield in shipping list, but price is bigger.