500W? That's an absurd amount of heat. I suppose they don't make 75W GPUs anymore (I'll replace my 1050Ti when they do), but still...
In my particular computer, CPU, GPU and display are rated to 65W, 250W, and 80W respectively. That’s 400W just for these 3 most power-hungry components, under high load/maximum brightness.
Lower-end office PCs often ship with ~500W PSU. Gaming PCs typically include 700W PSU or even more. For instance, nVidia recommends 750W PSU for their released but unavailable RTX 3080, that GPU itself is rated to 320W. Display ain’t included as it has a separate power plug.
When viewed as a heater, computers are almost 100% efficient. Almost all electricity they consume becomes heat. The exceptions are light from display escaping through windows, and radio from WiFi carrying energy through walls, both negligible.
This is just considering the colder season of the year.
I refuse to buy a GPU with extra power connectors.
The difference between these two is rather small, despite 4 years difference. 1050Ti delivers about 2TFlops, 1650 about 2.6 TFlops. Other specs (VRAM bandwidth, fillrate) are pretty close as well.
Generally, I only upgrade components when I can get at least 2x improvement.