Would strongly avoid generic PSUs. It's a one way ticket that can turn your entire PC to scrap metal if and when they fail. They may not have adequate OCP and OVP protections in place.
Just to add.
Don't forget also to consider where your PSU is getting filtered power, which is through your AVR.
Your AVR's wattage capacity should also be considered.
I.e. If you have a 700W PSU, get a 700W AVR or higher
If you have a 700W PSU but use a 400W AVR and your system draws a total of 400W or more, your AVR won't be able to handle it and may get damaged.
If you have a 400W PSU but a 700W AVR, and your system draws a total of 400W or more, your PSU won't be able to handle it and may get damaged.
Think of electricity (Power/watts) as water and you need piping (Wattage capacity) to handle all of it. If the piping can't handle it because too much water is passing through the pipe, it will naturally burst. This is true for as well for power delivery systems (cables) and power supplies/voltage regulators
Your PC will only draw how much power it needs. It doesn't mean if you connect a 650W PSU that you're PC is using a total of 650W.
You can see your total power draw if you buy a UPS instead of an AVR that allows for wattage monitoring consumption (such as APC UPS) and connect it via USB.
Here's my power draw being shown on PowerChute, a monitoring software from my UPS. It only shows 400W load while my GPU is under load.
Some UPS allows you to monitor the total power consumption of your system which is very handy. It usually involves connecting your UPS to your PC via USB connection. Not all UPS has this feature though.