So I bought a used GTX 1070. Tried it for about 2 weeks, unfortunately its a no go. I get eye strain. My eyes burns, with muscle twitches and all. This sucks. I tried connecting to my monitor using HDMI cable - eye strain. Next i tried using DVI port with a DVI to VGA converter and use VGA cable to my monitor - eye strain also. I tried using HDMI port with a HDMI to VGA converter and using VGA cable to my monitor - eye strain again. So my theory (in another thread) on how analog signal can flush out the thing that is causing us eye strain doesnt work with PC. https://ledstrain.org/d/483-android-tv-box-eye-strain-and-solution-for-pc-also/17
I tried the oldest driver I can find (from the CD), no go, and I tried the latest driver, also eye strain. I gave up after about 2 weeks.
I read the thread about GTX 970 and how AgentX20 can use his 970 without a problem. So I bought a used GTX 970, exactly his model, which is Gigabyte G1 Gaming model. I have been using this GTX 970 for a about a week now, and thankfully I can use it without eye strain. Phew. Thanks AgentX20. At least my home PC gets a bit of graphics upgrade from its GTX 760.