Mini-DP to DVI adapter causing display issues

Ok so I just bought a Powercolor 7870 graphics card and I am trying to use 2 Acer 21 inch displays. Even though they are the same monitor one has a VGA cable and one has DVI. The video card has 1 DVI port, 2 Mini-DP ports, and 1 HDMI port. I'm trying to use both monitors by using a vga to dvi adapter and a dvi to mini-dp adapter. Both displays work, but the one connected to the mini-dp adapter is giving me weird graphics anomalies (little grainy pixels everywhere) in windows (NOT in BIOS or at any time outside Windows 7 - which means drivers??) Any tips?

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  1. At the very least maybe someone could tell me how they would even describe this problem...I honestly don't even know what I'm looking at lol
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