Blizzard 1260 @ 66mhz, will it get too hot ?

bundyboy123

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I received my blizzard 1260 today and installed a 66mhz oscillator.
Will it get too hot with no fan ? specially under load.
Back in the 486 days I remember they got very hot, even with heat sink.
I have a large simm so no room for fan.
Also I have left the trap door off for more air.
 

DutchinUSA

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When I was running 060@50mhz I was amazed at how cool to the touch it was compared to 040's. Now, that was running stock speed, maybe someone with an overclocked 060 will have a better answer for you running @66mhz.
 

fitzsteve

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Pending on 060. Rev 6 will be cool as ice

This is not true, it still gets hot just not to the extreme where it's outside the operating window.

Especially if you install inside a Desktop wedge where there is no ventilation.
 

roy_bates

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a revision 1 will need a heatsink at 66mhz,a revision 5-6 wont

if the blizzard is stock chances are it will need a heatsink,hope that helps.

- - - Updated - - -

Same voltage, same clock, what makes it run cooler ?
Puzzling :unsure:

they shrunk down the electronics inside in the cpu basically which in turn makes it cooler in operation,the cpu is actually under the gold cap on the underside all the rest of it is just carrier wires and pins to plug it in to the socket.
 

fitzsteve

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Yes it can get very hot, it depends on ventilation, how hard you push your amiga, for example intensive tasks. Also the condition of your amiga, timing issues, etc can all make a difference.
 

bundyboy123

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My amiga is very stable, so I dont think it has any timing issues.
If it is happy being very hot I dont mind.
I just need to know its not going to die.
I have been running a lot of demos and raytracing.
I googled Blizzard 1260 rev.2 and people are saying it does get very hot.
I have removed the trapdoor and raised it 1 cm off the bench.
I've seen people put a fan on the bottom side of the card, does this really make a difference ?
 

fitzsteve

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It's perfectly fine as long as the temperature is within the data sheet recommendations. Keeping it cool won't hurt though, remember these cards are getting older and the convecting heat could strain other components such as cpld.
 
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bundyboy123

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IMG_1422.jpg

My cooling at 66mhz.
This is passive with no fan, but a good large heat sink covering 1 half of the cpu.
The hottest part of the cpu is covered.
I used silicon heat sink plaster to glue it on.
Also, it can be removed easily.
 
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