If that's actually a gray label CX 450, then, while it's still not a great power supply, it's probably ok, better at least than the older green label CX units.
I would be very careful about ordering that unit, and verify it's actually what it says it is though because the LINK for that unit, as you posted it and as it shows on Amazon indicates that it is a VS 550w, and you absolutely do not want a VS series unit, even less, by far, than that CX gray label unit.
In reality, I'd probably recommend paying 5 bucks more and getting the 550w CX unit, which is a 2017 model and a better platform with somewhat better quality than that 2015 CXm unit you linked to. This one isn't modular like that one, but it is a better unit, has a 100w higher capacity and will probably give you enough headroom that the questionable quality becomes less of a factor with that configuration.
PCPartPicker part list /
Price breakdown by merchant
Power Supply: Corsair - CX (2017) 550 W 80+ Bronze Certified ATX Power Supply ($49.89 @ OutletPC)
Total: $49.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-11-18 01:02 EST-0500