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T-Bird Heat Dissipation Specs

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April 16, 2001 11:49:22 PM

Can anyone tell me (or point me to) the heat dissipation specs for each of the 133MHz T-birds (1.0GHz, 1.13GHz, 1.2GHz and 1.33GHz)* ?

*At their default clock!
April 17, 2001 2:45:34 AM

Have you tried AMD's <A HREF="http://www.amd.com" target="_new">website</A> duh! :smile:

- Tempus fugit donec vestrum relictus tripudium. Autem amor praeterea magis pretium.
April 17, 2001 3:26:10 AM

AMD's absolute temp maximum is 90 C up to 1000 MHz and 95 C over that. Anyone even close to these temps is one step away from a toasted CPU.
AMD's specs contained in "AMD Thermal, Mechanical, and Chassis Cooling Design Guide" (p. 13, Publication # 23794 Rev: B Issue Date: October 2000) gives the following guidelines:
CPU up to 48 watts: C/W of .55
CPU up to 55 watts: C/W of .41
CPU up to 70 watts: C/W of .32
C/W means that for every watt the CPU radiates, the heatsink is supposed to cool the core by C/W x watts plus ambient temp. AMD specs system temp at 45 C, which is on the warm side. What all this means when you run the numbers is the following:
CPU up to 48 watts: 26.4* + 45 = 71.4 C
CPU up to 55 watts: 22.6 + 45 = 67.6 C
CPU up to 70 watts: 22.4 + 45 = 67.4 C
*(48 x .55)
Now that's AMD's Guideline; if you're overclocking, experience has been that temps in the mid 40s and up will start to impact stability. Temps per AMD are OK at normal speeds and voltages, although anyone used to Intel's temps has a hard time when they see numbers like this.
So if you just adhere to AMD's spec, anything over 67 C is not recommended. Hopefully you do better than 45 C case temp, so you should knock at least 10 and better yet 15 C off the 45; this gives you something like 50 C, assuming a 30 C case temp. That's about the upper end of "acceptable".
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April 17, 2001 3:49:50 PM

ejsmith2~ That's exactly what I needed (and contrary to Tempus' "duh" remark, the first thing I did was to go to AMD's website - but the info wasn't to be found).

Thanks a lot for the education!
April 17, 2001 3:57:18 PM

I found them on AMD's web site. I didn't think I would need to show you exactly where. DUH! :smile:

- Tempus fugit donec vestrum relictus tripudium. Autem amor praeterea magis pretium.
April 17, 2001 4:04:36 PM

Thanks for the "help".
April 17, 2001 6:48:39 PM

lol.

- Tempus fugit donec vestrum relictus tripudium. Autem amor praeterea magis pretium.
!