就這樣吧
請見Intel® 915G/915GV/915GL/915P/915PL/910GL Express Chipset Datasheet
第27頁
Supports two memory addressing organization options:
⎯ The memory channels are asymmetric: "Stacked" channels are assigned addresses
serially. Channel B addresses are assigned after all Channel A addresses.
⎯ The memory channels are interleaved: Addresses are ping-ponged between the channels
after each cache line (64-B boundary).

支援非對稱式的雙通道....可以插不同容量 三根也可達成雙通道
只有INTEL 9系列以前的雙通道 才必須插同樣根數 同樣容量 才能開雙通