I don't know how you can be so sure that that's what I did, but you're right...
My 2500K is en route, I'll find out if I broke the mobo tomorrow, hopefully, but UPS is saying Wednesday.
I really should have left the thing alone till I could try it with a CPU first, but I started taking off the stupid cover glued on the NB cooler covering the fins and it just went from there.
At least it isn't a $200 mobo...
Edit/Update: Well, turns out acetone will not eat away the chip. I think this chip's actually the Southbridge. Anyway, board is running solidly. Machine is fast as hell.
That said, the consensus seems to be to use pure isopropyl alcohol (as high a percentage as possible) for cleaning. So don't do what I did.
Silverstone SG06: 2500K@4.5Ghz on Corsair H80 Push+Pull Scythe Kama Flow 2, Gigabyte Windforce GTX 670, ASRock Z68M-ITX/HT, 16GB Patriot DDR3-1600 @1T, OCZ Vertex 3 120GB