Undervolting/Overclocking issue with multiple gpus

Recently I’ve been trying to overclock/undervolt with the HiveOS overclocking panel. For some reason I’m able to get individual cards to work (I’ve tested all of them for about 30 minutes to an hour with no problem on these settings), but when I use them together they constantly crash. They also work together with no OC settings at a higher wattage, so I don’t think that’s the problem (for what it’s worth, they’re all plugged into a 1200w server psu and the motherboard/rest of it is plugged into a 430w regular psu). If anyone has any advice that’d be great!

Here’s an image of the settings I’m using:

show result of execution command amd-info

I think 930 is to high