Overheating BPPC component

[AmigaMance]

Hi.
 I am using a slightly modified BPPC card: The original cooling plate is removed and two heat-sinks with fans are attached on the 603 and 68040 CPUs. The good thing about this, is that the 2 CPUs are cooled enough. The bad thing is that the black, square chip next to the 603 (with the label CY7C37) is getting to hot to the touch.
 Do you think that i should attach a heat-sink to it? What kind of heat-sink and glue should i look for exactly? (I bought the card this way, so i don't know about these things)

[Framiga]

and this is why P5 had done those custom heatsink ;-)

Anyway . . .you should:

reinstall the original fan-heatsink more an additional fan on top the "thing"

or like you said, to add a small heatsink on those controller.

Remember that even the 2 IC regulators, goes hot as well.

EDIT- if you have enough space (tower), you could use heatsink on PPC-040-controller-regulators and a BIG Low rpm-Low noise fan (ie 92mm) blowing air on the whole card.

[delshay]

i will like to see a photo how the new heatsink is attached..

[AmigaMance]

@Framiga:
 I think i will go for the extra heatsink on the chip, because the one on the 603 is very well glued and i don't feel very confidence to remove it and replace the original cooling plate.
 Do i need a special kind of glue? Like a thermo-conductive one (IF such thing exists, of course) or any kind of glue will do the job?

@delshay:
 If you mean the heatsink that i'm going to attach, i would be happy to upload a picture somewhere but i don't have a digital camera or a scanner.

[Framiga]

if you want to purchase a thermal glue you can.

I personally use the normal thermal compound, with 4 little drops of cyanocrilate, at the 4 corners.

Apply the thermal grease on the chip, then clean the 4 corners, apply 4 "very, very little drops" of cyanicrilate at the 4 corners and push on the heatsink . . .  .QUICKLY ;-)

It works and you can easily remove it, if needed.

NOTE- pay only attention to use the right amount of thermal compound (to avoid that the thermal compound, goes onto the IC pins)

[x56h34]

Here's how I attached a fan on top of the PPC heatsink. It's a VGA 12V fan which I secured with adhesive thermal paste. The PPC heatsink is used as originally planned. I removed the old non-adhesive paste from the top of the 603e chip and I put a fresh new coating (since the old one looked kind of dried out). The old PPC fan underneath the card has been disconnected, as it attracts dust around the 603e. It's not necessary anymore, with the 12V fan in place. There's more than enough cooling. When I touch the PPC heatsink during play of a PPC game for example, it only feels slightly warm. It doesn't burn my finger as before. :-)

[delshay]

@x56h34

DO **NOT** REMOVE THE ORGINAL PHASE 5 FAN..

THE OTHER CHIPS UNDERNEATH THE HEATSINK ALSO NEEDS COOL AIR..

THIS IS WHERE SOME BLIZZPPC FAIL..

on my BLIZZPPC the chip in the corner is in contact with the main heatsink to keep it cool..done with flat copper heatsink....cut to size..

your BLIZZPPC may be fine now, but wait until the hot months & you may get lock-ups...

[delshay]

@AMIGAMANCE

if the heatsink is glued to the ppc processor ** DO NOT TRY TO REMOVE IT **

you may damage the processor..

it seems you can see this littel chip in the corner..just add a heatsink to it..

its also a good idea to add heatsink to the other chips on the other side of the board..two are near the BVISION socket..

if you also do this, YOU MUST DO THIS WITH THE BVISION & RAM ATTACHED..or you may fine you cannot add BVISION or RAM..

[x56h34]

@delshay:

The newly added bigger, more powerful, and overall much better heatsink adds plenty of cooling. The old fan would only attract unnecessary dust in the area of the 603e chip, if I were to plug it back in.

[AmigaMance]

@delshay
 Thanks for the warning. I will not remove the heatsink on the PPC. It seems you and Framiga are right about the 2 chips on the other side of the board, they are getting hot too. Maybe less hot than the mentioned chip, but hot anyway.


 I have a last question about this: 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?

[delshay]

@X56h34


you are cooling the PPC chip,but what about the others..

there are for other chips that need cooling  ( FOUR CHIPS )..their may work now,but whats going to happen come summer..it will get hotter..



my BLIZZPPC has a small thin copper heatsink making contact with the main heatsink..

but my BLIZZPPC heatsink has also been modify,it now has a built in fan ( you can replace the fan )..

as i said before,if my new fan failed, the orignal PHASE 5
heatsink will act as a normal PHASE 5 heatsink with the orginal PHASE 5 fan..


the chip in the corner under the heatsink gets very hot..   NOTE: this is also due to the chip on the other side..but this chip has more cool air as there is no heatsink above it..in turn it heat-up the chip even more under the heatsink..


RESULTS: you may get lock-ups..fast ram may disappear..then return..if the chips are not kept cool..

[AmigaMance]

 So, if i have understood correctly, when these chips are overheated they give you some signs/warnings. Like lock-ups and temporal fast-ram disappearing. They don't get burned without a warning, right?

[x56h34]

@delshay:

So those chips are not touching the heatsink, but they only are dependant on the small Phase 5 fan blowing on them? Is that what you mean?

[AmigaMance]

 Can someone answer my question? The weather is getting warmer and i want to be sure about this.

[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?"