Interestingly, the TDP for the new 2.6GHz Athlon 64 FX-55 is higher than that of its FX predecessors. The FX-51 and FX-53 both carry a TDP of 89W, but the FX-55's TDP tops out at 104W. Don't be too alarmed, though. As our recent Athlon 64 4000+ and FX-55 review shows, the FX-55's power consumption is a far cry from Prescott's.
Apart from interesting details on TDP, the Processor Power and Thermal Data Sheet also lists maximum case temperatures (TCASE Max). While the majority of the Athlon 64 family has a TCASE Max of 70C, the maximum case temperature for an FX-55 is listed as 63C. Given the chip's higher TDP and 2.6GHz clock speed, a lower temperature requirement seems reasonable. What's more curious, however, is the fact that the 90-nm Athlon 64s have a 65C TCASE Max while their 130-nm counterparts are rated to 70C.