The two kits I have and tested with the Z590 FTW are..
Good idea, very helpful for people considering their options. Here's mine so far, I have more on the way from Newegg. Z590 Dark, BIOS 1.04, i9-11900K, 3090 FTW3 Ultra, all water cooled.
Corsair Dominator Platinum RGB 4000MHz 2x16GB,P/N:
Tested with 2 sticks in Z590 Dark, XMP Fails to boot in Gear 2 (or Gear 1) and only boots if clock dropped to 3600Mhz (is ok on Gear 1 @ 3600MHz). Anything over 3600Mhz is a no go, despite multiple attempts with raised voltage, VCCIO_Aux, and checked VSA was between 1.25 and 1.3V. The same set of ram had no problem working at XMP on EVGA Z490 Dark KP.
G.Skill Trident Z Royal Elite 5333MHz 2x8GBP/N:
unsure, already returned. rblaes_99 might know.
Tested with 2 sticks on Z590 Dark. Could not post at all above 2133MHz... rblaes_99 has sent this set and his set back under RMA.
G.Skill Trident Z Royal Elite 4800MHz 2x16GBP/N:
Tested with 2 sticks on Z590 Dark. Loaded XMP defaults and Gear 2, saved and rebooted, posted no problem at all. Thanks rblaes_99 for the help.
..currently waiting on some G.Skill Trident Z Royal Elite 4800MHz 2x16GB, p/n F4-4800C20D-32GTES. rblaes_99 already has this model and has been able to post at XMP settings (Gear 2) without issue on the Z590 Dark.