What is the coolest Athlon XP Processor?

[E_tron]

What is the coolest running AMD Athlon XP or Duron Processor(at stock)?

I was thinking the 1700+ tbred-b or the 2100+ Thorton.

[stamasd]

Uhh, that depends A LOT of what cooling solution you use. For instance my Barton 2500+ runs at 37 degrees with a Zalman on; before that it ran at 43-44 with the stock cooler.

[E_tron]

well, i was thinking total heat output. Sure, the core would be cooler with the Zalman, but it is still putting out about the same amount of heat.

I don't know what total heat output is measured in. I am guessing Joules.

[dalilman52]

nope, its c/w, not so sure wat that is, but go here and ull see which hs's do best in overclocker's socket A heatsink roundup..hope that helps (http://www.overclockers.com/articles373/socketA.asp)
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[stamasd]

C/W is a measure unit for thermal resistence, which is a characteristic of a CPU/cooler junction. If you wnat to measure heat generation, the appropriate unit is the Watt (Joules/second), which measures how much energy (Joules) is put out per time unit. You would probably need to do some calorimetry experiment to find that out. I'm not aware that someone did it so far.

[I.M.O.G.]

Originally posted by E_tron
What is the coolest running AMD Athlon XP or Duron Processor(at stock)?

I was thinking the 1700+ tbred-b or the 2100+ Thorton.

Go to www.amd.com and look up the heat output ratings in their tech docs. That would be the best place to find the exact answer to your question.

[dalilman52]

heh, but amd's website is a big jumble, its so hard to browse....
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[E_tron]

Originally posted by dalilman52
heh, but amd's website is a big jumble, its so hard to browse....

he has a point:rolleyes:

[stamasd]

This was posted in another thread here:

http://www.amd.com/us-en/assets/content_type/DownloadableAssets/Electrical_Specification_Rev04_ENG.pdf

[shiyan]

I'd say a 1.2Ghz 0.13 micron Mobile Athlon operating at low voltage... or the Duron 550.

otherwise a really really slow Duron.

Tbird 650 (1.7v): 36.1w

Palomino 1500+ (1.75v): 60.0w

Thoroughbred 1700+ (1.5v) 49.35w

Duron 550 (Spitfire, 1.5v): 21.1w winner?

Duron 900 (Morgan, 1.75v): 42.7w

I think a Mobile Athlon XP based on the Thoroughbred running 1.2Ghz and 1.1v, would be around 21.8w.

[hitechjb1]

I haven't looked all the AMD XP processors.

But between Barton and Tbred B DLT3C, for the same performance using the same HSF, I found that a Barton would run about 3 C lower and consumed about 10% less power than a 1700+/1800+ DLT3C based on typical rating.


Originally posted by hitechjb1
Comparing Tbred B 1700+/1800+ DLT3C and Barton 2500+ overclocking performance, power and temperature

If one is planning just to get the highest CPU frequency (MHz) or raw power (MIPS), for certain reason, then the lower Vcore rated Tbred B 1700+/1800+ DLT3C would have an edge to get the highest MHz number.

On the other hand, CPU MHz or raw power is not the only means for achieving highest system performance which including CPU raw power, cache and memory performance, memory bandwidth. The Barton 2500+ would consume less power than the Tbred B 1700+/1800+ DLT3C for delivering the same overall system performance. The main argument is that Barton 2500+ can achieve the same level of system performance as the 1700+ by virtue of the larger L2 cache, even the Barton 2500+ is running 5% lower in CPU MHz and raw power compared to a 1700+. The larger L2 cache (256KB more) improves program performance ranging from 0 - 10+ %, depending on the particular applications. As a result, Barton 2500+ consumes lower CPU power (~9% lower) and die temperature (for the same cooling).

Explanation:
What happens to programs running in CPU with smaller and bigger L2 cache (http://forum.oc-forums.com/vb/showthread.php?s=&postid=2244094#post2244094) (page 17)


Next, let's compare power consumption between a Barton and a Tbred B DLT3C.

Link:
Comparing power of Barton w/ 1700+ DLT3C (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1792497#post1792497) (page 3)

From the overclocking characteristics shown below of a 2500+ and 1700+/1800+, at 1.8-1.9 V, by reading from the graph, a 2500+ running about 7% lower in MHz (raw CPU power), would consume about 12.5% lower power and about 3 C lower in die temperature. This means the two are delivering the same overall performance (within 2-3%), but Barton consumes less power and runs with lower CPU temperature.

Further, for a given cooling setup for the same system performance, lower power is less likely running into stability problem due to temperature than the case by simply pushing voltage and CPU MHz.

Overclocking characteristic (voltage, frequency, power, current, temperature) of Tred B 1700+ DLT3C and a Barton 2500+ (http://forum.oc-forums.com/vb/showthread.php?s=&postid=2062488#post2062488) (to get to the graph, may have to scoll the page up and down for the right post)

Observations:
The calculation and characteristic show that
this particular Tbred B 1700+ DLT3C,
- at 1.95 V, it can do 2.59 GHz, 61 C (w/ 30 C ambient system temperature and a 0.22 C/W HSF),
- at 1.95 V, it dissipates 142 W power, draws 72 A current
this particular Barton 2500+,
- at 1.95 V, it can do 2.42 GHz, 57 C (w/ 30 C ambient system temperature and a 0.22 C/W HSF),
- at 1.95 V, it dissipates 123 W power, draws 63 A current

So at 1.95 V, the Barton 2500+ run 4 C lower in temperature, but running about 170 MHz slower.
But Barton has a 512 KB L2 cache, 256 KB bigger than the 1700+.
In general, the bigger L2 translates into performance gain of 0 - 10+% higher (average about 5%)
depending on applications, compensating the slower raw CPU speed.
As a result, it is about tie between the two on overall performance.

[E_tron]

Originally posted by shiyan
I think a Mobile Athlon XP based on the Thoroughbred running 1.2Ghz and 1.1v, would be around 21.8w.

Mobile Athlon XP CPUs are based on Socket A? They will fit in a Desktop computer?

[georgelogy]

Yes, they are, and they will. There are a few people here that have done it, and as a side note have had some pretty descent overclocks with them. Anyway, they will work, but I don't know if they would actually run any cooler than a slightly underclocked desktop processor.

[Quailane]

My 1.4 Duron runs at 1.45 volts and 2Ghz. Idle is 25C and load is 29C with generic silicon thermal paste and a cheap Dr. Thermal heatsink. With artic silver 5 and an slk-900u heatsink with 92mm vantec tornado, I think frost would form on the heatsink.