Caporegime
300W I believe pushing it too much. Undervolting we need and using Wattman not MSI AB which is not fully compatible with Navi yet.
FYI. Just adding 0.70mm - 1mm washers, without even moving the cooler, could improve thermals, let alone replace the graphite pad with Kryonaut. (on Steve's example uses Hydronaut).
Apparently seems is the vapour chamber that isn't flat. :/
Unwinder's got a Navi due soon.
I don't rate Wattman at all.
Undervolting is only a "thing" because of AMD's crap settings/stock set up.
300W on a morpheus cooler should be easy, it's apparently capable for 360W.
So far every set of results I've seen has had 5700XT's maxing out at ~250W at ~2.1GHZ.
Should be able to push it that extra few percent at 300W.