Question Kernel Power System Failure ---- Plzzzz Help

[Andrewbandrew05]

So I put this build together for a friend and hes getting kernel power system failures every couple of days. I had a similar problem with my build (had to upgrade from an 850watt to 1250watt psu to fix) and I'm wondering if he needs a bigger psu. Heres the part list.
PCPartPicker Part List

CPU: AMD Ryzen 5 2600 3.4 GHz 6-Core Processor ($144.52 @ Amazon)
Motherboard: MSI B450 TOMAHAWK ATX AM4 Motherboard ($236.48 @ Amazon)
Memory: OLOy 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory
Storage: Seagate Barracuda Compute 2 TB 3.5" 7200RPM Internal Hard Drive ($54.99 @ Newegg)
Video Card: XFX Radeon RX 590 8 GB FATBOY OC+ Video Card ($229.99 @ Amazon)
Case: Phanteks Eclipse P300 ATX Mid Tower Case ($89.99 @ Amazon)
Power Supply: Corsair CXM 550 W 80+ Bronze Certified Semi-modular ATX Power Supply ($158.68 @ Amazon)
Wireless Network Adapter: TP-Link Archer T4E PCIe x1 802.11a/b/g/n/ac Wi-Fi Adapter ($29.99 @ Dell)
Monitor: Sceptre C275B-144RN 27.0" 1920x1080 144 Hz Monitor ($198.97 @ Amazon)
Total: $1143.61
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2020-06-25 20:34 EDT-0400

Thanks for the help!

 

[Andrewbandrew05]

According to a power supply calculator the total load should be around 400 watts and the build has a quality 550 watt psu. Did I get too small a psu or is something else going haywire. And if something else probably is any ideas what it could be?