TJMax is 105C on the 32nm CPUs tested so far so these chips have lots of head room. This information should be written into Model Specific Register (MSR) 0x1A2 in bits [23:16] in Core i7 and i5 processors. You can use any MSR Tool to read this register. Enter 0x1A2 in the MSR Number box and click on Read MSR.



The results are in hexadecimal so:

64 hex = TJMax 100
69 hex = TJMax 105

A Core 2 CPU like my E8400 doesn't report anything in this part of the register. (00)