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Quietest Tbird orb cooler? -OR- underclocking the 1200MHz bird

L

Leo V

Diamond Member
If I sink to the depths of having a CPU fan in my system, I will do so with dignity. Please bring on the advice. It must be very quiet, my PSU fan is almost inaudible.

PS: Alternatively, I'm considering getting a 1200MHz Tbird and underclocking to 1000MHz. In theory this should be a very cool-running 1GHz Tbird, shouldn't it?
 
I would not go with an orb style cooler for the T-Bird - they are more trouble than they are worth.

If you want a decent, quiet fan, try the Cooler Master DP5-6H51, though this sink has an idiotic retention clip IMO.

The last T-Bird I ordered in came with a Global Win heatsink, which does a very nice job of cooling the cpu and has a sensible clip, but the fan on it is LOUD, very LOUD.

Your idea of underclocking a 1.2gig T-Bird won't work - all T-Bird's 1gig or over use the same core voltage, so underclocking gains you nothing.

Regards

Greg
 
My thoughts exactly! A Tbird that does 1200MHz @1.85V might pull 1000MHz @1.7V, don't you think?
 
the 1200 runs at 1.75 volts, so you could probably do 1000 at 1.65 volts. That would still be 50 watts at max dissipation. If you want the quietest possible fan, you'll have to get a agilent arcticooler.
 
Thanks for the info, but how does the math work here? Specifically, how does required voltage relate to frequency for a given CPU? Is it proportional? ie, 1000/1200 * 1.75 = 1.46V required @1GHz? Or quadratic, ie SqRoot(1000/1200) * 1.75 = 1.60V required? And how do you calculate the max Wattage?

Thanks!
 
It's not proportional. You 1200mhz tbird might not even run at 900 with 1.65 volts of you are not lucky. It depends. If you want a cool cpu you might reconsider and get a duron. I think tbirds with heat too much for a slow, quiet hs/f.
 
The Alpha weighs 330g. That is more than the 300g limit recommended by AMD according to Tom Hardware's latest review. You might squish your wafer or even rip it if you move your PC. That's the main reason why I chose instead a GlobalWin FOP32-1. That weighs only 220g.
 
just get a big heatsink, (alpha, globalwin FOP series) and either -
Run the fan on 7v instead of 12 (connect it between the +12 and +5v powersupply rails)
or just buy a quiet fan (panaflow) and use that instead 🙂
 
Dennilflos,

TOM made a big deal about weight but it nothing to do will squishing the chip. Its about the weight hanging off the socket during shipping. This would not be an issue with home built systems.
 
I had to build a nearly silent machine because my wife hated all of the noise.

The HedgeHog (which I bought from Plycon) is truly a monster of heat absorbsion. I put it on a 750 running 950 @ 1.825 and then used a Delta Black Label fan (LOUD) but under-volted it to 5v. The temp under full load only went from about 101F to about 105F and the fan was nearly silent. Since then I've tried a couple of HedgeHogs with the SanyoDenkei fan sold at Plycon... this fan is just about as quiet as the under-volted Delta but puts out considerably more airflow. The end result in either case was a very, VERY quiet HSF with considerable cooling power.

Joe
 
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