PM981和PM981a的區別為:
1、寫入速度不同:PM981、為2300MB/S,PM981a為3000MB/S;
2、高速緩存效率不同:PM981為64層堆疊NAND,PM981a為96層堆疊NAND;
3、可選容量不同:PM981有512G、1TB、2TB三種容量,PM981a有512G、1TB兩種容量。