I bought this particular one few weeks back - working great so far for an old rtx 1080. I'm powering it using the included sata to 6pin adapter. (then obviously the 1080 with it's own 8pin adapter) I just got a one-pack, but the same vendor sells multipacks. https://www.amazon.com/gp/product/B08MWZP83D/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1