i have never gotten my "unknown" cpu properly recognized on gigabyte EP45 boards. any solutions someone knows be great if you share. as far as CPU temps being recognized, you can read them via an App called hardware monitor, or if you want to read via iStat you can get fakesmc from netkas

http://netkas.org/?p=338

make sure you remove dsmos before installing the kext. for some reason took me 1 reboot with flushing cache and another reboot not, for istat to read temps properly