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Low heat CPUs ?

B

BeBumbleBe

Senior member
I've got a 1ghz T-Bird on a KT7 and while it works great, I can't run it full time because it puts out a lot of heat. As a result I run my 3 year old (!) dual BP6 Celeron...
Anyway, has there been any improvements since I last checked ot is it still very much of a problem. also can the KT7A take the new Athlons ?
TIA
 
um, are you sure the Tbird puts out significantly more heat than 2 Celerons?
From Sandpile, Max Power for each.
28.3 W (0.25 µm Celeron A @ 533 MHz, PPGA)
1000 MHz TB: 54 W

So 2 533 Celerons would be putting out 56.6W maximum, which is more than the Tbird


For info, here's the figures for Palominos and Thoroughbreds:
1000 MHz PM: 46.1 W
1200 MHz PM: 54.7 W
1333 MHz PM: 60.0 W
1400 MHz PM: 62.8 W
1466 MHz PM: 64.0 W
1533 MHz PM: 66.0 W
1600 MHz PM: 68.0 W
1667 MHz PM: 70.0 W
1733 MHz PM: 72.0 W
1466 MHz TH: 49.4 W
1533 MHz TH: 51.0 W
1600 MHz TH: 52.5 W
1667 MHz TH: 60.3 W
1733 MHz TH: 62.1 W
1800 MHz TH: 67.9 W
 
well it's nothing more than an observation really. When I turn on the T-Bird system, my (small) office turns into a sauna.
Maybe it's not properly cooled..probably is though because its very stable. I do have two Alphas on the Celerons so maybe that's part of the explanation. Still even if I put a larger fan on the TBird, the overall amount of heat is going to be the same no?
The T-Bird is a 0.18micron fab, isn't the Throughbred a 13micron, and would as a result produce less heat at the same speed ?
thanks
 
If doing the same amount of work, then yes, the same amount of heat coming out will be the same(it has to go somewhere, or else the CPU would continuously heat up. That would be bad)
Now, I'm assuming you're not OCing the TBird, cuz that would throw the numbers way off. Also assuming you're not doing anything royally stupid like actually only running on one of the celerons or something.


The Thoroughbred produces less heat at the same speed. For example:
1466 MHz PM: 64.0 W
1466 MHz TH: 49.4 W
That's nearly 15W less

If you're really hardcore, you could try and track down a mobile XP or Duron, they all seem to run around 25W, pretty much regardless of speed.
 
Originally posted by: BA
If doing the same amount of work, then yes, the same amount of heat coming out will be the same(it has to go somewhere, or else the CPU would continuously heat up. That would be bad)
Now, I'm assuming you're not OCing the TBird, cuz that would throw the numbers way off. Also assuming you're not doing anything royally stupid like actually only running on one of the celerons or something.


The Thoroughbred produces less heat at the same speed. For example:
1466 MHz PM: 64.0 W
1466 MHz TH: 49.4 W
That's nearly 15W less

If you're really hardcore, you could try and track down a mobile XP or Duron, they all seem to run around 25W, pretty much regardless of speed.
Click to expand...


Makes sense, your original post had Palomino's and Thoroughbreds with the same wattage, which seemed odd. The PM would still be an improvement over the T-Bird if I remember wel though, had they reduced power consumption by 20% possibly ?
 
Originally posted by: BeBumbleBe
I've got a 1ghz T-Bird on a KT7 and while it works great, I can't run it full time because it puts out a lot of heat. As a result I run my 3 year old (!) dual BP6 Celeron...
Anyway, has there been any improvements since I last checked ot is it still very much of a problem. also can the KT7A take the new Athlons ?
TIA
Click to expand...

The KT7a is happy with the AXP's as long as you have a rev 1.3 mobo. Great upgrade for this board! I've got a KT7a with a XP1600+ at 1700MHz.

jaybee

Edit: From Paul's Unofficial KT7 faq:
KT7A/KT7A-RAID versions 1.0 to 1.2: All Athlon (Thunderbird) processors with both 100MHz and 133MHz FSB. AthlonXP processors are not officially supported due to a minor timing problem that can require you to hit reset during a cold boot. Unofficially, however, few people seem to experience this problem and these processors work fine.
KT7A/KT7A-RAID versions 1.3: All Duron, Duron (Morgan core), Athlon (Thunderbird) and AthlonXP processors to 2100+ are supported. AthlonXP processors at 2200+ are not supported
Click to expand...
 
ok I've got version 1.0 :-( so it seems it might still work.
Any multiplier problems or is that fixable with a BIOS upgrade ?
 
Originally posted by: BeBumbleBe
ok I've got version 1.0 :-( so it seems it might still work.
Any multiplier problems or is that fixable with a BIOS upgrade ?
Click to expand...

Can you currently set the multiplier through BIOS? My guess is yes, although it's probably best to upgrade to the latest BIOS for your board. Check out the KT7 faq here.

jaybee
 
yes, although since my 1ghz T-Bird is locked it hasn't done me much good.
Thanks for the link.
So some KT7's couldn't set the multiplier ?
 
Originally posted by: BeBumbleBe
yes, although since my 1ghz T-Bird is locked it hasn't done me much good.
Thanks for the link.
So some KT7's couldn't set the multiplier ?
Click to expand...

I don't know of any KT7 that can't set the multiplier. You should see the option in your BIOS, even if the cpu is still locked.

jaybee
 
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