In the future, each miner has three mainboards, each with six dedicated ASIC processors for mining, and each dedicated ASIC processor for mining features 32 1Gb DDR3 memory. In total, there will be 72 GigaByte of DRAM memory on a F3 miner,
The math does work out:
(3 boards) * (6 ASICs) * (32 RAMs) * (1 giga
bit) = 576 gigabits = 72 gigabytes