View Full Version : CPU WAtts
ruffus
11-23-2007, 11:14 AM
hey guys can someone tell me how to work out how many watts of heat my cpu is putting out so i can tune my system to match what my cpu puts out:shrug: if you need to know i have a AMD Dual-Core Opteron 175/2.2Ghz-Socket 939-L2 2MB (2x1MB)
[XC] gomeler
11-23-2007, 12:55 PM
Forget what the formula is but a bit of googling will get the rough guess for it. Something like TDP_new = TDP_stock * (Frequency_new/Frequency_stock) * ((vCore_new/vCore_stock)^2). I do believe this no longer works though due to multi-core designs but I'm not positive. For example with a G0 Q6600.
267.8w = 95w * (4400/2400) * (1.55/1.25)^2 which I'd say is actually slightly hotter *shrug*
edit: formula was recalled off of memory, might be missing factor or something.
edit2: with AMD chips tuning for load doesn't really matter, you need to tune for cold-bug instead. It really sucks having to purposely cripple a system to achieve your best HTT/CPU speeds but it's a fact of life with AMD chips. I'd tune the system so around 180w you were sitting around -15C to -25C on the evaporator FACE, anything colder and you'll end up coldbugging with 300+HTT. Not guaranteed but this is my experience with the 3200's and 165's
jinu117
11-23-2007, 02:40 PM
frequency new/frequency stock part need to have some kind constant in front that is smaller than 1. In actuality quad q6600 G0 dumps mostly max 210-230w range for single stage at most. Cascade story could be about 260-280w due to rediculous voltage often supplied.
Opties tops around 200-210w usually.
ruffus
11-23-2007, 07:30 PM
thanks for the help guys