These are the new parts:
751358 ASUS GeForce GTX 670 2GB PhysX CUDA
PCI-Express 3.0, "DirectCU II TOP", GDDR5, DVI-D, HDMI, DisplayPort, DL-DVI-I+DL-DVI-D, HDMI, DisplayPort http://www.komplett.no/k/ki.aspx?sku=751358
Try some of the solutions in the post above first, but.....
Ivy bridge cpu's weren't supported until bios rev 3202 on your MB. So your MB may have an earlier bios version that doesn't support the Ivy CPU you installed. You might need to find someone with a Sandybridge CPU so that you can update your bios.
BTW, wire/cable ties are relatively cheap. you should clean up the wires in your case :0