I am unsure of the board and how it is going to overclock the 3570K but I was looking at other models of the same board and it seems that all they include is more expansion ports and SLI support. I would like to get the CPU up to about 4.5ghz under good temps.
For AutoCAD and Photoshop you most likely won't benefit from overclocking so I wouldn't really suggest it. I'd suggest putting that money in getting a dedicated GPU. The onboard video isn't really meant to be a substitute for dedicated video. That fan you have is junk - it's no better than the stock fan.