Seems to me that Intel's custom CPUs for the recent (2008) iMacs all are labeled E8xxx, which is Intel's designation for desktop CPUs. This is in contrast to previous Intel iMacs which used the Txxxx mobile CPUs (except the previous 2.8GHz 24", which I believe used the X7900 -- still a mobile CPU, but with slightly higher power consumption). Some recent Geekbench postings reveal the actual model numbers (which do not seem to be part of Intel's public products): E8135 @ 2.40 GHz: http://browse.geekbench.ca/geekbench2/view/54815 E8335 @ 2.66 GHz: http://browse.geekbench.ca/geekbench2/view/54962 E8235 @ 2.80 GHz: http://browse.geekbench.ca/geekbench2/view/55542 E8435 @ 3.06 Ghz: http://browse.geekbench.ca/geekbench2/view/55388 Other people here have concluded that the chipset in these machines is Santa Rosa rather than Montevina. However, this site apparently categorizes these CPUs as part of Montevina: http://www.nbcpu.com/showproduct.asp?ID=740 (note links to other CPUs on the right) Does anyone else get curious by this? The new iMac seems to be some sort of Santa Rosa/Montevina hybrid on crack, with custom desktop-class CPUs thrown in. Does the E8xxx designation actually say anything interesting about the CPU core, or is it just Intel's way of telling Apple that this is too hot for laptops?