Advanced Micro Devices Inc (AMD)

[pgerassi]

Dear Wbmw:

Look at the way AMD specified the CPUs for TDPmax. They take the absolute worst case for Iccmax*Vccmax+Pht+Pio+Pdram. This is specified at most 35W. Banias 1.5-1.7GHz has a TDPmax of 33.8W (I included AGTL+ termination and PLL power). Their TDP is some typical power no where near TDPmax for them. Now stop grant power for MA64 2700+ is at most 4.5W at min Pstate frequency and 15.4W at max Pstate although with C&Q, I do not conceive of a time when this occurs since I think that first the freq goes to min, the Vcc to min and then the CPU is halted. For Banias 1.5-1.7 this is 17.3W. Sleep mode is 3.4W for 2700+ (5W for all MA64) and 17.0W for 1.5-1.7. Deeper sleep is 0.16W for all MA64s and 1.35W for all Banias. Since AMD's numbers include all external sources and the DRAM bus, Banias should include power sourced into the FSB and the DRAM bus(es) on the NB.

Still it is apparent that Banias 1.5-1.7 uses more power at all points than MA64 2700+ especially the low power points. And it shows that the 130nm SOI peocess (or A64 design) leaks less than Intel's 130nm bulk process.

Pete