Macworld notes that Intel is officially announcing the availability of more power-efficient quad-core Xeon processors to be available today. The new Xeon L5320 and L5310 processors consume only 12.5 watts of electricity per core, using 35-60% less power than the existing quad-core Xeons. No word on whether or not Apple is planning on using the newest Quad-core processors in upcoming Macs, despite persistent rumors of Apple introducing a 8-Core mac pro. These new processors, however, feature a slower clock speed (1.60GHz, 1.86GHz) than the existing less power-efficient (2.66GHz) Clovertown Quad-core processors. For readers interested in the top end of performance, Intel revealed last week that later this year, they will be releasing a higher end 3.0GHz version of its Quad-core Xeon for customers who aren't concerned with power consumption. The current 2.66GHz Quad-cores or these upcoming high end chips appear to be the most likely candidates for future 8-Core Mac Pro models, as power consumption is not a major consideration for Apple's high end desktop machines.