If desktop four core processors intel yorkfield use C1 core stepping , then servers harpertown are based on older C0 revision .
Intel decided to update xeon processor with a new stepping, E0. First E0 processor will appear during 3 July, and they will reach the mass delivery level in the middle of autumn.
Servers motherboards will require BIOS update for correct support of the updated processors. CPUID will be updated from 0x1067A to 0xA005b013.
The maximum TDP value for the new intel xeon processors will be lowered from 150 to 120 W .