Graphics card artifacting (sort of)

[nomadspy]

Okay this gonna be way too difficult thread since posted about this problem long ago and the suggestions didn't work.
So I got GT730 GDDR5 (which I RMAd!!!!) cheap card with low power consumption to replace the old GT220 and being able to play some casual games. Did it and even played Assassin's Creed Black Flag for weeks with it. Without going into much detail this is what happens. Everytime the gpu clocks chage e.g. YouTube flash player, video games, benchmarks I get some fuzzy dots all over the screen which are barely visible but annoying and unacceptable to me. If I stress the GPU with FurMark it gets even worse. Initially I thought it was my power supply. And what do you think I did? Bought quality Corsair 500W PSU. Also as I mentioned I RMAd the card with another GT730. But NO boom same thing happens.
So good folks. Tell me is it my MotherBoard or that I use VGA adapter to my monitor or my monitor doesn't like the card. The card is odd x8 2.0 PCI-E and my slot is x16 1.1. Is there some correlation here? It's difficult question isn't it...

*Tested all sort of drivers, voltage changes with EVGA precision, downclocks and two different OSs.

 

[p_nut_uk]

What resolution are you running, the thing that stands out for me there is the VGA adapter

 

[nomadspy]

My monitor's max resolution 1280x1204

 

[p_nut_uk]

If you have a HD TV try plugging it in with a HDMI cable. Try borrowing one off a friend if possible. You should really try and rule out the adapter before you think about replacing the motherboard.