Author: Matt Taylor
Date: 11:45:05 01/24/03
Go up one level in this thread
On January 24, 2003 at 10:05:43, Jorge Pichard wrote: >On January 24, 2003 at 05:32:21, Matt Taylor wrote: > >>On January 24, 2003 at 03:05:08, Jorge Pichard wrote: >> >>>" For cost reasons, AMD does without a heat spreader. With a core voltage of >>>1.65 Volt and a clock speed of 2250 MHz (Athlon XP 2800+), the maximal thermal >>>dissipation is 75.3 Watt, while that of the Athlon XP 2700+ (2166 MHz) is 68.3 >>>Watt." For that only reason I prefer the Athlon XP2700+ since the performance >>>difference is NOT that Great. >>> >>>http://www17.tomshardware.com/cpu/20021001/xp_2800-01.html >> >>http://www.doerte-richter.de/mulle-78/AMD/amd_term_power.htm >>http://www.intel.com/support/processors/pentium4/thermal.htm >>http://www.intel.com/design/Itanium2/datashts/25094501.pdf (page 13) >> >>Here are some nice exerpts: >>Thunderbird 1.4 GHz - 72.1 W >>AthlonXP 2100 (Palomino) - 72.0 W >>AthlonXP 2200 (Thoroughbred A) - 67.9 W >>AthlonXP 2700 (Thoroughbred B) - 68.3 W >>P4 2.0 GHz - 75.3 W >>P4 3.06 GHz - 81.8 W >>Itanium 800 MHz - 130 W >> >>75.3 Watts isn't really that bad. It just means you need a bigger power supply >>and a better heatsink. > >What I don't like is when the temperature gets 85 degrees Celsius. But this is a >defect from most AMD which run extremely HOT . > >Pichard All of these chips will hit and exceed 85 C without a proper cooling solution. (To make reference to the infamous THG video, nobody has -ever- reproduced the same effects. In fact, quite the opposite has been reported.) 85 C is the maximum operating temperature -- that doesn't mean they typically run that hot. I have a 1.2 GHz Thunderbird (a 65.7 W chip) that runs 42 C max (15 C drop). This is a crude estimate, but a 75 W chip in its place would probably run no warmer than 44-45 C, and that is plenty fine by me. I have a dual-AthlonMP 2000 workstation at work. Each chip is 70 W, and there are two of them (creating more ambient heat, lowering thermal drop because of additional strain on system fans). The system holds nicely around 50 C. This is using "stock" AMD heatsink & fans. The point is (1) hitting 75 W output isn't anything new and (2) high thermal dissipation doesn't necessarily means hot. -Matt
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