Wii gaming in 4k

[Shonumi]

Just to nitpick, there's no such thing afaik called 6x SSAA. The next step up from 4xSSAA is 9xSSAA. 4xSSAA generates an image that's twice the width and twice the height of the original image before doing any shrinking, thus you generate an image with 4 times as many pixels. 9xSSAA generates an image with 9 times as many pixels as the original, likewise. Trying to do 6x IR in combination with 4xSSAA (which is what you tried to do? It isn't clear) would force your GPU to generate an image at 12x IR (7680x6336) so it's no wonder you're chugging along (I'm not sure any GPU can do this currently). 6x IR alone should achievable though (3840x3168).