600e. fighting heat.

[Mantas]

hello,
Is it only mine 600e that after about of 30 minutes of "fan-less" work, fan starts to blow verry hot air. mibilemeter shows about 75-80 C in the first graph and 38-40 C in the second. The bottom of tp seems to be very hot.

Only one question here- is it normal that bottom gets so hot?

I checked cpu, touched metal just above it and then metal on the cooling tray- both seem to be of similar heat, so I assume heat distribution to cooler is OK. It seems that cooling is very poor (fan, lack of fins to increase cooling area etc.)

I'm even considering taking apart cooling "tray" and putting some copper radiators (ones that are ment for cooling RAM for overclocked video cards ) in. I thought that fixing a couple those radiators in the middle of output hole and fan inside that alluminum box.I assume it would slightly improve things.

Let me know what you think about this idea, as I don't think its normal to have a pII 366MHz at about 80 C, while my desktop p4 1.5 GHz during burnin never exceeds 50-55 C.

[Mantas]

Test No.1

Here's what I did today to find out is it worth to mess around and invent something.

pushed cpy till case reached 37-38 (where fan turns on). turned off cpu burn in. Then took 12mm fan and stuck it in PCMCIA slots through "quicky" adaptor (that could take whole air stream inside case).

It cooled system off in less then two minutes to 24 C (less then there was right after boot).

However CPU cooled of in ~5 min. to its initial 35 c.

Right when case reached 36 C system fan turned off (initial BIOS- no upgrade).

It appears that 12mm fan is very much more than enough, so tomorrow I'll try regular VGA sized fan (Test No. 2). If everything goes fine I'll have to find more appropriate place for fan (PCMCIA definitely isn't the place for air intake ) (Test No. 3).

Also I'll try to put heat sink inside air output tray.
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Brought home alluminum (copper will have to wait) heat sink meant for GPU cooling. From the first glance it looks like its just a bit too big to fit inside- time to take tools out

[Mantas]

Test No. 2. small diameter vga cooler.

The same situation as in previous test, except here I used small diameter vga cooler.

Temperature in case reached is initial state after approximately 5 min.

Cpu temp. was decreasing considerably slower.

Also I let cpu burn-in run for 15 min with a vga cooler running in pcmcia. case temp. increased only 2 degrees, while cpu never reached 73 c. I think its quite good as without this fan running it increases in a matter of seconds.
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Right now I'm indoubt about putting heat sink cpu fan theoretically blows in the oposite direction than in regular cases of ordinady cpu cooling. I in fact may increase the temp, as alluminum may collect the heat from hot blowing air.

Does any one knows is there at least 0,5cm between cpu and keyboard? I'm tired of taking apart it

[Mantas]

How much of you guys are using modem? I found more than enough space when removed it to fit extra fan to keep lower interior temperature.

in fact it has enough space to contain even custom made cooling system not only fan:)

I'm planing to mount fan in or out (haven't decided it yet) on the bottom of case, with hole made just below fan and form channel, with epoxy resin, to drive stream straight to motherboard somewhere near cpu.

Please share your ideas (and criticism:lol: ) about it. and don't worry I have quite good hold of epoxy resin

[farna]

Removing the modem for a second fan is the best cooling idea I've heard yet. Even if you don't redirect air flow it should help considerably. Shouldn't take to much power either.

[Mantas]

Thank you for support:) I'll start to work on this idea as soon as I find more spare time.