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[all variants] Hardware help with PCIe-Passthrough/QEMU/KVM

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I've been screwing around with Linux, mainly Ubuntu with Cinnamon installed for a few years now but mainly use windows because I'm a gamer. I recently learned about PCIe Passthrough and am interested, but only have one GPU and want to make sure everything is compatible before I throw money at it. Can someone more knowledgeable than me tell me if this setup will work?

Current setup:
2 Displays: 1 television via HDMI and a small monitor via DVI (Monitor quality is not very important, it's mainly for Discord)
MOBO: ASRock 970A-G/3.1
GPU: 4095MB NVIDIA GeForce GTX 960 (ASUStek Computer INC)
CPU: AMD FX-8320E Vishera 32nm Technology

Here's what I'm thinking: I know one GPU needs to be dedicated to the VM. I'm thinking about buying a 1050 ti for that and using the 960 as my main GPU. I don't mind switching sources on my television, so that's no issue. I had previously tried, for proof on concept, using an old EVGA e-GeForce 8600 GT (Yeah, I know it's next to useless, I gutted it from a pc I got for free), however for whatever reason only the 8600 seemed to work in Ubuntu, as well as Win7 (UEFI issue maybe? IDK) In both instances the 960 is detected, and in Ubuntu the display hooked up to my 960 (I had my monitor hooked up to the 8600) was detected, and was receiving a signal, but it was all black. I appear to have been able to move windows and my mouse over to it as well. Installing Nvidia's driver sent me into a log-in loop that google searches were not able to fix. I wiped my HDD, did a fresh install, and same thing - black screen on my TV, installing proprietary drivers sends me into login loop.

My gut is telling me my Mobo doesn't support this.
Any help would be greatly appreciated. I really want to get this to work. I'm planning on going to school for something in the computer field in about a year and would really like to get much more comfortable with linux, which is hard to do when 80% of my time on my PC HAS to be on windows and it's just annoying to reboot.

Edit: Could power supply be an issue? currently have 680 watts
Edit 2: Definitely feeling power supply could be an issue. Ever since I installed my 2 optical drives 2 sets of my USB ports directly on my MOBO stopped working.

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