Overheating BPPC component

[AmigaMance]

 Hello??
 It's a real simple question you know. Let me quote it for you:

" In case of CPU overheating the system starts to crash frequently, so you know that the CPU(s) are getting too hot and you switch of your Amiga for a couple of minutes.
But what happens if these chips are overheated? Does they give you any sign? Or they just fry themselves silently?"

[amigaxyz]

 Hi. I have a BlizzardPPC too but i'm not an expert. My guess is that they should give some kind of warning, like lock-ups before they die. I'm not sure, thou.

[Framiga]

Hi AmigaMance

i think that we have (more or less and in different way) already answered to your question.

There aren't absolute bahaviours in such overheating situations. Usually CPU overheating, could freeze, crash even burn you CPU (but this is not your case, seen that you have already cooled it)

Then there are:

ICs regulators (2), the ram controller (those CY7C37)

The setup suggested by x56h34 its quite OK . . .but NOT remove the original 30x30 mm fan . . . .that is not there only to collect dust! ;-)

If you don't like the P5 solution, go for a separated heatsinks for the above mentioned components. (with a fan on PPC and on the 040)

At a side note, i've recently read an interesting article about hi quality and safe thermal glueing.

To avoid that the thermal adhesive, will broke the CPU if you need to remove it, its enough to mix the thermal glue with the thermal compound (in 1:1 rate).

You will need i'e Artic Silver adhesive and Artic Silver compound mixed at 50%.

Will be more easy to remove it (and Artic Silver is a very, very good product).

Last suggestion: check carefully that the heat of the components, is fully transfered to the heatsink (sometimes the haetsink "seems" cool only because, the thermal compound is applyed in a wrong way).

An easy way to check this is . . . run for about 30 seconds the system with the fan switched OFF.

The heatsink MUST rise the themperature rather quickly . . if not, there is something wrong on the heatsink installation.

If the heatsink will go warm quickly, you are OK . . . try it for no more than 1 minute or so and the shut down :-)

[x56h34]

@Framiga:

I would just like to make something clear about my solution. The original small phase 5 fan attracts dust if it's turned on and working. I didn't meant that it attracts dust just by sitting there regardless of it being turned on or off. :-)

If that fan is turned on and spinning, the heatsink on the other side provides a perfect cover for any dust that's sucked in by the fan to stay there, in the area of the 603e chip. That's why I suggested unplugging that fan from receiving power. The dust build-up around the 603e can eventually kill it.

You will not notice any dust problems right away, but it will slowly build up in 6 months or so.

This is a very tricky task...to properly cool the entire BPPC weak spots. :-)

[Effy]

The BPPC+Bvision that Amigamancer refers to used to be mine, installed in a really big RBM Towerhawk which looks a bit like THIS one. And just like I do with my pc big tower I added a 5,25" Twin Cooler in one of the bays, a thing with the same size of a CDrom but with two blowers that cools off the entire tower with at least 15 degrees Celcius, -30 according to the add on the box. But as I live in Belgium and my computer-bed-room is placed at the far east side of my humble house, I don´t have any heat problems in the room, not even if the temperatures outside get hot, which is not exactly happening often in Belgium  :lol: That´s why I haven´t had any problems with this combo, even took it to the AmigaClub meeting once to show how you can connect two monitors and have two different screens at once without using any Zorro busboard  :lol:

[delshay]

@x56h34 & FRamiga


if you remove the orginal phase 5 fan i will suggest you put some kind of contact between the heatsink & the littel chip in the corner..( IF THE MAIN HEATSINK IS KEPT COOL ENOUGH ) this is what i have done...this is the same chip on the other side of the board..

NOTE: this is why i can overclock @ a very high rate..UPDATE TO FOLLOW..