On Wed, Jun 04, 2003 at 09:11:41PM +1000, David Harrison wrote:
The #1 hottest (litterally) CPU available in the marketsegment we are talking about is the Intel P4 3GHz with HT enabled. It even puts out more heat then the latest top of the line AMD Barton.
I would be interested in seeing figures on this; do you have any references or is this based on your observations?
As matt already mentioned, this is based on the info provieded by the specsheets freely attainable both at Intel and AMD developer/systembuilder pages. All CPUs always have such documents that give highly detailed information about everything you need to know about the processor to eg build a motherboard for it.
Unless you want to dig through the Intel and AMD websites a quick summary of latest CPUs heat output (in W) can be found here http://www.aceshardware.com/read.jsp?id=55000279 As you can see the P4 are well in the lead, which matters in a U1 case enviroment, where the interesting part really is total amount of heat generated that has to be moved out of the case.
Based on the output of 'sensors' on our servers: - dual athlon MP 2100: 57-64 C. - P4 3.06 Ghz with HT enabled: 37 when running idle and up to 45 when working on both "cpu's".
Be very carfull to take the MB sensors output as gospel. The only thing they are usually good for is to notice when you have an abnormally high temperature vs what you usually have (which could eg indicate a failing heatsink fan). Today with heatsensors mounted on the chip itself you could get very accurate numbers, but next to every system out there is set to show 20-50C lower then the _actual_ value. The reason for this is that most people are used to the figures that the external,often ill placed sensors used to show and would freak out if the really knew how hot their cpu is running.
Additionally for the record, the AMD techspecs talk about an operating temp of AMD-XP of max 85C and the "overheating turn off power" kicks in at _125C_ (SIC!).
Eg you can look around here http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_739_3748,00.html eg XP model 10 is the Barton
On page 33 & 37 you find the thermal dissipation (aka heat output) figures and on p 52 you have the emergency shutdown temp details.
-- /Stefan
Software never has bugs. It just develops random features. =)
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