Processor Number : i7-920

# of Cores : 4
# of Threads : 8
Clock Speed : 2.66 GHz
Max Turbo Frequency : 2.93 GHz
Intel® Smart Cache : 8 MB

Bus/Core Ratio : 20
Intel® QPI Speed : 4.8 GT/s
# of QPI Links : 1
Instruction Set : 64-bit
Instruction Set Extensions : SSE4.2
Lithography : 45 nm
Max : TDP130 W

Processor Number : i3-540

# of Cores : 2
# of Threads : 4
Clock Speed : 3.06 GHz
Intel® Smart Cache : 4 MB

Bus/Core Ratio : 23
DMI : 2.5 GT/s
Instruction Set : 64-bit
Instruction Set Extensions : SSE4.2
Lithography : 32 nm
Max TDP : 73 W

The i7-920 has been tested and is working, I unfortunately don't have a the board to test the i3-540 so can't guarantee anything on that CPU.