16AWG is larger than 18AWG (just making sure peops realize that).
I have experience with Corsair's Premium PSU Cable Kit (in red and black - looks nice), and I had terrible experience with those. They look great and feel great but can't take the heat.
I have literally melted 4 sets of cables, and only found out that those were the culprit after troubleshooting everything else. I also had issues with some coloured extension cables on another PC - same overclock.
Now for context I Overclock an 18-core 7980XE and push it to near 400-500W (not really supposed to), and most of my headaches came from the GPU power cables while overclocking 4x ASUS Strix 1080Ti OC's to above 2050Mhz - those created problems within weeks. Screen jams, black screens, PC freezes, you name it ... found the "charred" (burned) cables and replaced them by some PRO CableMods and so far so good - CableMod pro cables are true 16AWG - I asked them if they would build me some 14AWG's and they refused saying it would be out of specs (understandable).
Makes me wonder how those LN2 overclockers get these processors up to 7.2Ghz and still push power through ??? Makes no sense to me yet. What cables do they use ??? Beats me.
And I held a few world records myself on 3dmark for ages - 10'th last i checked on timespy extreme hall of fame, right above Der8auer :-) (look up Excesseve).
My 2 cents.