I have a 5090 Windforce OC that I have been running a 0.895 undervolt with the GPU clock flattened at a max of 2800MHz and a +2000 on the memory.
I have been pretty happy with this undervolt. It hasn’t had a single issue in the months I’ve been using it and it was getting what I thought was pretty good scores in 3D Mark.
However, I saw a post the other day where OP was getting a time spy graphics score of 49928 at 3000MHz compared to my score of 49072 so I decided to increase my voltage from 0.895 to 0.900 to see if this helped. I still kept my clock at 2800 and a +2000 on the memory.
My Time Spy graphics score went from 49072 to a best of 50136. Due to inconsistent CPU scores this was not on my highest total score run though.
My steel nomad score went from 15321 at 0.895 V to 15675 at 0.900 V
All in all I’m pretty happy with the gains for such a small change.