I am using this one by corsair - "Corsair Premium 600W PCIe 5.0 / Gen 5 12VHPWR PSU Cable - Fits Type-4 PSUs via Dual 8-pin PCIe - 12+4pin Connector - Mesh Paracord Sleeving - Black/White" https://www.amazon.com/gp/product/B0BLXWHW2N/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

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It is quite long but tucks away nicely behind the GPU at the front of the case. Good luck with your build. Let me know if you have questions.