Now that's not always a bad thing but it can mean odd issues that everyday folk have trouble working out. To see if you are possible pushing your luck I use a quick and dirty test. I take the TDP of the CPU, GPU and 20 Watts per drive to see if I exceed a single +12 rail. If it does I call it not a good fit.
30 Amperes at +12V is 360W.
CPU TDP = 65W.
GPU TDP = 225W
Drives (2?) 40W
So the PSU should be OK.
Back to the BUILD. It is VERY UNCLEAR what issue you are having but the MONITOR might not wake up being it's non-standard. I don't expect it to wake on boot. This has long discussions so let's skip that for the more common issue I have with Ryzen builds.
1. The BIOS is out of date.
ALWAYS get your Ryzen build's BIOS up to date or to the version the MOTHERBOARD MAKER SUGGESTS. We never take the advice of the seller or folk in forums (unless it's over at PCMR.)
2. I like the basics of this build except:
a. The split rail PSU.
b. The 75Hz monitor. I'd like to see the old 60Hz and 120Hz so these wake and play without pushing the builder to the brink. 75Hz may be fine but the story is light so for now I'm not a fan of this choice. THAT IS, I WOULD NOT CONNECT THIS WITH HDMI!
FINAL ANSWER? The parts look compatible but with caveats about monitor connection, BIOS version and then ... drivers.