Stratcat <none@no.org> wrote:

[snip]
Power consumption/dissipation scales linearly with clock speed.
Power consumption/dissipation scales as the square of Vcore.

It's the added Vcore, that really produces the heat, as can be seen
from the mathematical relationship. Just ask any OC'er, and they'll
tell you things don't really start heating up 'till you crank up the
Vcore.

I've been overclocking for a few years, the heat can be troublesome ;-)

While there's a few other things going on, the linear clockspeed
and squared Vcore cover the major 'ball-park' basic components.

The equation would look something like this:

PWRoc = TDPstock * (FSBoc/FSBstock) * [(VCOREoc/VCOREstock)^2]

For your delta Vcore, this would be:

PWRoc = 35 (FSBratio) [(1.93/1.35)^2]
             = 35 (FSBratio) [(1.43)^2]
             = 35 (FSBratio) [2.045]
             =  71.575 (FSBratio)

Now, just multiply 71.575W by your (FSBoc/FSBstock) ratio.

71.575 (208 / 133) = 112W

Thanks for that, it sounds reasonable given the cooling it needs.

You now have your new typical power dissipation for your OC'd chip.

You did not supply your FSB info, so I couldn't solve for it.

That's about it, except that TDP is just what it states: Thermal
Design Power. It's a design spec, not an exact measurement of a
specific chip, but rather of the typical power dissapation, as per
design specs.

It is what the chip manufacturer believes is the typical scenario for
use when using commercially available software. It is NOT the maximum
TDP, which is a calculated using the cpu's maximum core V & I values.

I honestly don't know if heavy DC use is considered typical, when
calculating TDP, but I'd suspect it's in the ballpark, possibly on the
very high end.

There's a few other heavier things going on, but this should get you
roughly in the ballpark.

BTW - That's a pretty hefty increase in Vcore. If I tried that with
one my P4's, they wouldn't live the week, I'd suspect. ;-)

It runs seti 24/7, it's all about keeping the heat under control.
Some specs;
Mobile xp2400 @ 2.6GHz (208 x 12.5)
2 x 512 Corsair PC3200LL (2.9v CL2.5)
Danger Den water blocks (cpu, gpu & nb)
1 x 120mm rad (2 x 120 fans, pull-pull, 10v-9v) top of case pulling air in.
0.5L res and Laing D4 Pump
2 x 80mm front fans at 9v, 120mm side exhaust - 1800rpm, 92mm rear exhaust -
2000rpm + psu fans.  Reasonable temperatures, it is stable at even faster
speeds but I backed it off a little, 2.1volts scared me ;-)

Ambient 25C
Case 29C
Cpu socket 39C (diode under cpu)
Mobo can't measure cpu diode, but it's normally socket + 10C.

Go for it !

Good Luck

Thanks, I'll need the luck to pay for it ;o)

-- 
Apollo