okay so here's my deal, a while ago i bought myself a gigabyte nvidia geforce 750 and had no problems with it... then later i decided it was time for an upgrade so i went out and bought a new power supply, processor, motherboard, case and just a bunch of fans. no graphics card though, that came later, so i installed all my components with my old hard drive, RAM and graphics card, and ran the computer without any problems. then later i wanted more, so i went out to buy a saphire tri x r9 290 then went home to install it, and that's where my lack of knowledge and common sense came in, without uninstalling the old graphics card i just switched. some time after running it i realized that if i continued using it it would either melt or crash 
so i removed it and put the old one in. later i was told i had to uninstall drivers, and i did, i did the drivers correctly and it still had problems. so then i was asked what kind of power supply i had, the answer was a disappointing " corsair cx500 " so then i bought a corsair cx750M and sent my GPU to the store i bought it to test if it was broken. it came out fine and i installed it with all the correct drivers and hardware, ( motherboard : ASUS z87k , cpu : Intel Core i7-4790K ) and it still wasn't working correctly, unless the card is suppose to not run skyrim without input lag in the lowest settings, (and I've checked it's not skyrim settings I've also tested other games) so then i contacted someone who knew his way around this stuff and he recommended formatting the hard drive wich i did and now here i am with my new gpu that's not working despite new driveres, new computer essentially, new power supply and everything in order, running at a mere 35°idle and 50°gaming
so i removed it and put the old one in. later i was told i had to uninstall drivers, and i did, i did the drivers correctly and it still had problems. so then i was asked what kind of power supply i had, the answer was a disappointing " corsair cx500 " so then i bought a corsair cx750M and sent my GPU to the store i bought it to test if it was broken. it came out fine and i installed it with all the correct drivers and hardware, ( motherboard : ASUS z87k , cpu : Intel Core i7-4790K ) and it still wasn't working correctly, unless the card is suppose to not run skyrim without input lag in the lowest settings, (and I've checked it's not skyrim settings I've also tested other games) so then i contacted someone who knew his way around this stuff and he recommended formatting the hard drive wich i did and now here i am with my new gpu that's not working despite new driveres, new computer essentially, new power supply and everything in order, running at a mere 35°idle and 50°gaming
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