William Mou says to YSITD 他 k20 價錢也差不多（？ https://www.ebay.com/itm/NVIDIA-Tesla-K20-5GB-GDDR5-PCI-E-2-0-x16-Server-GPU-Accelerator-Card-CUDA/283713921440?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D40719%26meid%3D6383f728882544898888fa9b88733e77%26pid%3D100623%26rk%3D1%26rkt%3D6%26sd%3D283700012682%26itm%3D283713921440%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100623.m-1