On 01.05.2016 15:30, Daniel Kulesz wrote: > Hi Nico, > >> On 01.05.2016 12:26, Daniel Kulesz via coreboot wrote: >>> Coreboot with idle=poll: 15,8W >>> Coreboot running "stress": 37,2W >> well, this is what I would expect from the specs. >> >>> Vendor BIOS with idle=poll: 15W >>> Vendor BIOS with intel_pstate=disabled: 10W >>> Vendor BIOS running "stress": 24,3W (!!) >> This looks suspicious. Doing some calculation: >> You are measuring at the wall plug, efficiency could be around 83%, >> which would leave 20W. Chipset, backlight and other stuff needs power as >> well, say around 8W, leaving 12W for your 25W TDP CPU??? >> > Well, I could imagine that the PSU's efficiency is better than 83%, > and maybe the CPU is just rated at 25W TDP while in fact it consumes > less. Please note that the whole family of CPUs is rated at this > wattage and so is the P9600 which runs at 2,66GHz and not just 2,53GHz > and at a slightly higher min. voltage (but slightly lower max. > voltage). > It's the other way around. If a sample is stable at 2.66GHz without drawing more than 25W it's a P8800, if only 2.53GHz it's a P8700 etc.
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