butre

depends. does the computer meet the minimum specs for windows 10?

yes it is. you used to see it all the time on amd boards from around 2010-ish. it's unusual (and today almost unheard of) and never well documented but I have seen instances where a new gpu requires a new bios on multiple occasions. it's why some laptops will let you get away with putting just about any graphics card in it and some will bitch about anything but the original one too.

sometimes yeah but other times you'll need a bios update to run newer graphics cards. off the top of my head I know an m5a99x evo won't run anything newer than an HD 7000 series without a bios update

it likely isn't working because it uses a legacy boot mode. install windows from that computer and it should work

it'll drive it, but it's not going to be pretty. that's an AV receiver, not a headphone amp.

you ground stuff by connecting them to ground. connecting them to just any old piece of metal doesn't do anything.

all weapons should be legal for this purpose. nuke duels would be this country's greatest pastime.

heads seasonic, tails cooler master, edge be quiet

all 3 of those are good, flip a coin.

if you have to cheap out on a power supply buy a used one from a trusted OEM. I'm pretty partial to FSP group whenever I need a psu for next to nothing. you can usually find them on ebay for >$40. just make sure you pick something that meets your wattage requirements and has all the connectors you need. an 80+ rating is a good bonus but most oem power supplies don't get rated.

you'll want to keep it, more recent windows 10 installers create it as a more fail-safe recovery method.

nah, it needs to be heat pipes. the thermal conductivity of copper is too low for that sort of application. you wouldn't need to solder them (or want to for that matter), just thermal epoxy and a good fit up should do the trick. you'll want something like this: https://www.aliexpress.com/item/32295488005.html you'll have to find one for your mounting pattern or make/modify one to fit

what cpu are you running? if it's ryzen using ddr4 4000 will screw you

that case will be enough heatsink to run that hardware passively without having to resort to weird stuff like mineral oil. just run a heat pipe or two across it

2009 or 2010 ish I bought a phenom II 955be and a motherboard that I knew could unlock it, and stuck an 8800gts on it temporarily, which eventually got upgraded to an hd6870 once I could afford it. in 2011 the motherboard died and I replaced it with a asus m5a99x evo and in 2012 the gpu died and was replaced with an hd7850. that configuration lasted me until early 2019 before the cpu died (was unlocked to 6 cores and cranked up to 4.3 ghz, so pretty inevitable) at which point it got replaced with an FX 4100 until I managed to save up for my current system and retired this one to my server closet. at one point while it was in there partially disassembled the gpu fell 6 feet and broke a couple mosfets off (they had heatsinks glued on) so I stuck a cheapo r9 390 in it here's a picture of that system as it sits today: original configuration didn't last long, but the final config made it 7 years.