I just built a computer and would like to setup eyefinity. However, I do not have a discrete gpu and all of my monitors are vga. I have one one monitor hooked up vga. could I use a usb to vga adapter for the second monitor? Would this (http://www.amazon.com/Manhattan-Serial-Converter-Connects-205146/dp/B0007OWNYA/ref=sr_1_23?s=electronics&ie=UTF8&qid=1412474436&sr=1-23&keywords=usb+to+vga) or this (http://www.amazon.com/TRENDnet-RS-232-Serial-Converter-TU-S9/dp/B0007T27H8/ref=sr_1_1?s=electronics&ie=UTF8&qid=1412474436&sr=1-1&keywords=usb+to+vga) work for doing that? And for the third monitor could I convert hdmi to vga with this (http://www.amazon.com/Black-Input-Adapter-Converter-Laptop/dp/B007KFVQXI/ref=sr_1_1?s=electronics&ie=UTF8&qid=1412479198&sr=1-1&keywords=sanoxy+hdmi+to+vga)?