@phoenix654: Keep at it....it's a steep learning curve but like I said, the BIOS is the foundation upon which everything is built and if you can get a grasp on what options/settings are available and what they do, you will have a good start. There should be several resources available on-line for your BIOS that explain the settings in relatively plain english as well as what sort of impact they might have. I would pay very close attention to any PCI-E/graphics specific settings as really, it could be something in your BIOS that is causing that corruption at higher clock speeds/resolutions etc.....a good troubleshooting procedure is to be aware of the supported speeds etc. as by default, the BIOS is probably trying to run the card as fast as possible so, a good way to go is to dial things back a bit. A lot of motherboards set timings and other basic settings etc using stupid terminology like "Extreme" etc.....any of these sort of things that apply to your PCI-E bus/GPU, dial them back a bit. At the very least you will gain some working knowledge regarding your BIOS settings and how they can impact not only performance but stability.
I hate to go back to phase 1 here but honestly, you really should be 100% confident the card is not functioning prior to RMA'ing it.....the situation has sucked so far but going through the hassle of returning it etc., just to find out there is no problem with it would suck even more.
Me personally, I would track down the latest NVIDIA drivers for Windows 10 (I believe it's the same install for 32 or 64 bit but check to be sure) and then do a clean install of Windows....at this point, it might be a good idea to try and mirror or backup that base Windows install so you have an easy way to get back to square one without having to do a reinstall. At this point (and I haven't used Windows 10 yet so I say this based on prior versions of Windows), Windows should be running at a basic resolution which it will attempt to optimize based on standard driver settings. This is the point where you want to ensure the card is operating properly...if it is outputting an uncorrupted signal here and displaying content without the red dots etc, I would tend to speculate that any display corruption encountered after this point, meaning after you go through the NVIDIA driver install, would be a result of that driver.
So, if a clean install of Windows with no NVIDIA drivers installed gets you a clean (although not optimized) display, like I said, try and mirror that base install so if the next step goes wonky, you can get back to Step 1 easily, then try and install the latest NVIDIA drivers...trying to keep that install as basic and as minimal as possible....driver only if possible....at least for testing.
If you do have to RMA the card, first order of business....get your PC running as well as possible using both the onboard graphics as well as the onboard sound. Frankly, if this machine can't play Portal smoothly (dependant on resolution/graphics settings) I would be a little surprised.
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