cpu資料
https://ark.intel.com/products/53464/Intel-Core-i7-2640M-Processor-4M-Cache-up-to-3_50-GHz
可以升級sata3高速ssd:
https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/What-is-the-SATA-speed-of-ThinkPad-T420/ta-p/848837
升級120gb ssd+$400 240gb+$600
usb 3.0
dual band 6250 wifi
最後1台要就快~office的舊機
歡迎whatapss:67035377