Remove the PPC heatsink and read the specs of the 603e chip which are printed on it. This will tell you what is the REAL speed of your PPC cpu.
Then use WhichAmiga as DoctorQ has suggested to see what your PPC card is clocked to run at. Usually this will be the same as your actual PPC cpu chip speed, but maybe not as sometimes (rarely) Phase 5 and especially DCE (often/always) used to overclock 160Mhz chips to 200 or 210 mhz. :-)