Mac Pro :: Can't Reset The SMC

2008 Mac Pro 2,1  10.7.4 Last week I upgraded my video card to a ATI Radeon 5770 to get better performace in Photoshop. This card was recommended for my machine by OWC. It came in a box with an Apple logo on it When I slid the card in I accidently knocked a heat sink that is right behind where this card goes. It fell off. Took the computer to an Apple center and they told me this was a crucial piece and that I needed to replace my whole  logic board. So I got a new logic board.  

Now the computer works fine, and video works fine, but on booting my HD / Expansion fan runs at about 2700rpm all the time. The Exhaust fan runs at 1500rpm all the time. According to iStat all my internal temps are fine. This fan problem is new. So I try to reset my SMC. The last step says "plug the computer back in, wait 5 seconds and then press the power button." However, as soon as I plug in the power cable my computer starts up, so I'm not sure I'm really completing the SMC reset process. 

I've tried another power cable with the same results. I've tried plugging the cable into another power strip / outlet with the same result. I've tried booting with the SMC disabled (hold "d" on boot) and the fans run significantly faster than they do now, which leads me to believe that resetting my SMC would be helpful. 

Info:
Mac Pro, Mac OS X (10.7.4)