Originally Posted by kolla
So how does mounting of the FPU and chrystal socket work, soldering and void warranty required, or not?
Only the ACA1233 has the required preparations for an FPU. And yes, you need to solder. A canned crystal *can* be used, but you can also just close the solder-jumper to route CPU clock to the FPU.
Adding an FPU may make the whole system instable. In that case, it may help to switch off burst mode.
Any soldering on the card(s) will void warranty. I do not recommend adding an FPU.