Okay that kind of makes sense. There is a problem though, well three.
Imagine you live in a small town. Something happens (COVID for instance) and your town becomes popular and your land value goes up. Yesterday your house was worth 100k but now it's worth 500k+. Your saying those people should essentially be forced out of their homes? To be bought up by rich people?
Additionally this means only the super rich would be able to afford homes? This tax would essentially mean only the top 1% could have a home and basically give them a free for all on any land they want. Why would we want that?
Lastly if you increased land tax by that much landlords would have to increase rent prices to offset this? So even with a govt subsidy the renter is still the person paying this increase.
Honestly I'm intrigued by this idea but once you start thinking about how it would work it falls apart. There is probably some variation of this that could work. Maybe in cities they'll be an extratax if you don't build some sort of minimum housing? But this is already pretty similar to just basic property taxes.
Okay a lot going on here and not really a lot of information
First thing I would check is does your motherboard have error lights? Even my computer thats 20 years old has lights that flash in patterns as booting. You use this to find out which part of the booting sequence failed, power, ram, video card, CPU etc. Find out which motherboard you have and find the owners manual. If you have SLI available it's an expensive motherboard and most likely has this feature.
Second, double check everything is plugged into the motherboard, ram all cables etc. Something may have shaken loose?
Might be worth physically inspecting the video card. That you could boot up once makes me think this failed. Maybe a capacitor on the video cap exploded or got knocked off.
Lastly try and take the 1080 out of your girlfriends computer and see if you can boot with that. This would help narrow down issues?
One more thing check if you have an igpu. Something may have failed and the motherboard switched to on board graphics. They'll be extra vga/dvi/HDMI ports on the back. Your lack of video could just be from having your display plugged into the wrong port. So try to hook up into any video out put there.
Also perplexity, chat gpt and Gemini can be helpful in trouble shooting.
Godspeed