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Posted: Thu Jun 06, 2002 2:59 am Post subject:

Quote:

if i had a good digital camera.....i would send you a pic of what i did to my case to lower temps.....lowered cpu 25 degrees and case temp about 10.....and all it is was a $8 piece of plasic

Till animal control gets called

INSUFFICIENT KNOWLEDGE

Yeah, Fahrenheit. I'm talking Celsius here.

Most people do not know how to behave in a massacre.

Posted: Thu Jun 06, 2002 10:06 am Post subject:

Satan..Don't bite the puppies!!!! LOL[ Very Happy

]

Posted: Sat Jun 08, 2002 1:30 pm Post subject:

Quote:
Satan..Don't bite the puppies!!!! LOL[]

I would never do that![B)]

Most people do not know how to behave in a massacre.

Posted: Sun Jun 09, 2002 9:43 pm Post subject:

heres a link to a shroud you may want to try over your cpu http://www.crazypc.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=120199&Product_Code=4029

i have one of these in my case, i replaced the crapass 17cfm fan with a 32cfm antec, which is gonna be replaced by a 50 cfm sunon once my stuff gets here

Till animal control gets called

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Posted: Thu Jun 13, 2002 8:22 am Post subject:

I have done a little research about my reported temps.
They seem to be absolutely ok.

Overclockers.com has done a review here
of my Swiftech MCX462A HSF. According to them the average C/W is at 0.30 for this HSF.

Interpreting C/W: For every watt the CPU radiates, the heatsink will cool the core by the
(C/W x watts) plus ambient temp. For example, at an ambient temp of 25 C, a C/W of 0.25
with a CPU radiating 50 watts means that the CPU temp will be 50 x 0.25 = 12.5 C over ambient temp (DELTA), or 37.5 C. The lower the C/W, the better.

Delta = CPU temp - Ambient Temp
C/W = Delta / CPU Watts

The Intel P4 2.4 has a heat outpout of 57.8W according to Intel's thermal specification sheet.
My ambient case temp is around 29-30°C (~84-86F). It's a hot day today.
My CPU core temp is at 45°C (113F) full load for 20h.

Using the above equation:
CPU Watts * (C/W) => 57.8W * 0.30 = 17.34°C (63.21F)(DELTA)
Casetemp + DELTA => 29.5°C(85.1F) + 17.34°C(63.21F) = 46.84°C (116.31F) (CPU core temp)

This leads to the conclusion that my C/W is even better than the mentioned 0.30. It is
Delta = CPU temp - Ambient temp => 45°C (113F) - 29.5°C (85.1F) = 15.5°C (59.90F)
Delta / CPU Watts => 15.5°C / 57.8W = 0.26 C/W

Even as my CPU is slightly overclocked (+210MHz) the heat dissipation shouldn't have increased (heat dissipation doesn't raise by o/c'ing but by raising the voltage IIRC)

Also Overclockers.com have tested the HSF with a bigger fan, a 80mm Delta w/ 68CFM. I only use a 80mm w/ 38CFM, thereby the C/W value should be higher(worse), but it isn't.

I am completely happy with my temps, I may get lower temps (and a less noisy case) with liquid cooling, but I have to get deeper into the subject before starting to buy the components needed.

Most people do not know how to behave in a massacre.

Posted: Thu Jun 13, 2002 3:23 pm Post subject:

45°C is not a terrible core temperature for a 2.4 GHz processor, and a 16° rise of core vs. motherboard is not bad. However, I would have expected you to get better results with that huge Swiftech heatsink and the 38cfm Sunon fan. That really is a top-notch heatsink.

Heat generation does go up (roughly linearly) with clock frequency. CPU heat generation also increases with the square of voltage.
V = Voltage
I = Current
R = Resistance
Ohm's law: V = IR
Power: P = VI
Therefore: P = V²/R

:pawa1:

more useless details to remember.

Posted: Thu Jun 13, 2002 3:42 pm Post subject:

Remember SOS, Workin = Workout.

If you raise the freq. you're doing more workout therefore workin has to go up to compensate.

All you have to do is look at intel data sheets and you should be able to extrapolate your power consumption at the new freq.

Your Heat disapation coeffecient (c/w) will vary a little depending on:
Ambient air of the HSF
Flowrate
Cleanliness of transfer medium, (fins)
Your bond between the HS and the CPU die.

Knowing this, you can kind of picture thermodynamically, what is going on in and around your HSF combo.

One more thing that JAE talked about was I²R losses. That really is Heat being rejected. That's why he said that as freq. rises, power consumption will rise approx lineary. But if you crank the core voltage up, (remember, P=I²R), Heat production will increase quite a bit more.

Thanks JAE!

Let that be a lesson to you pups at there. Run your Vcore as low as you can get away with..

WOOF!

PLD
"I wonder what goes through his mind when he sees us peeing in his water bowl." -Penny Ward Moser paw5

Posted: Thu Jun 13, 2002 6:25 pm Post subject:

seems to me that if you simply make the room airtight, and then put in a couple air conditioners, turned to max... that would solve allot of your problems really quickly!

fathertyme is soooo long to type out, and ft just doesn't cut it.
Now cheesy, that seems to just roll off the fingertips.
-beast

Posted: Thu Jun 13, 2002 8:58 pm Post subject:

But as we all know the P4 even lowers the voltage when running full power, that should give me also a little room.

I will extrapolate the real CPU Watts, but not now. It's too early (6:50 am) to do math.

Most people do not know how to behave in a massacre.

Posted: Thu Jun 13, 2002 9:03 pm Post subject:

where do you live???? 6:50 am.....DAMN

Till animal control gets called

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"Do you remember the time when the term Palm Pilot was just a term for when you hit puberty?" - Dennis Miller

Posted: Sun Jun 16, 2002 2:05 pm Post subject:

Quote:

where do you live???? 6:50 am.....DAMN

Till animal control gets called

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"Do you remember the time when the term Palm Pilot was just a term for when you hit puberty?" - Dennis Miller

Germany, man. And it was a working day... I like to take a look at The Pound just before the sun rises[ Wink

]

Most people do not know how to behave in a massacre.

Posted: Sun Jun 16, 2002 5:12 pm Post subject:

armed forces? cause you seem american to me....lol

Till animal control gets called

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"Do you remember the time when the term Palm Pilot was just a term for when you hit puberty?" - Dennis Miller

Posted: Sun Jun 16, 2002 10:10 pm Post subject:

Nope. The force is with me, but I am not with the Forces.

I'm just your average "shout-at-me-at-the-phone-because-it-is-my-fault-that-your-pc-is-not-working" hotline guy.

Most people do not know how to behave in a massacre.

Posted: Mon Jun 17, 2002 4:10 pm Post subject:

Can you believe it Smokin? We have German Shepards that actually are born and raised in Germany. He speaks pretty good English too.. Don't get him pissed, he'll swear at you in German and you won't even know that you just got ran over. LOL

OK SOS you may now bite the puppies. Just don't leave any lasting scars. It ruins their show value..

WOOF!

PLD
"I wonder what goes through his mind when he sees us peeing in his water bowl." -Penny Ward Moser paw5

Posted: Mon Jun 17, 2002 4:19 pm Post subject:

heh heh....dont get me wrong...i know some german (just what i hear from the movies and what my grandfather yells when hes angry)

Till animal control gets called

INSUFFICIENT KNOWLEDGE

"Do you remember the time when the term Palm Pilot was just a term for when you hit puberty?" - Dennis Miller