Does Anyone Know if not having a fan on your cpu will cause they system to freeze up before it can boot

[Jeff444]

I have built a new computer and it posts fine, the parts are all good, but it hangs/freezes shortly after boot. Each time I restart the computer from then it feezes a little sooner until it freezes before it even posts. I am positive that all the jummpers are set correctly. I can't change things in setup, because it freezes before I can save the changes. I really only have about 15 to 25 seconds at best. Since I have changed out all the parts and I know they work and my bios is the latest version, the only thing I can think of that this computer has that others I have build to now have is a cpu fan. Does anyone know if the fan can cause this kind of problem? Or Does anyone know of anything that would cause this kind of problem. Below is a list of the components on my machine.

Tyan Trinity 400 motherboard, ATI PCI 128 all in wonder video card, Western Digital 20G HD, Pentium III 733 processor, 128meg PC133 RAM, standard atx case, standard floppy, and standard everything else.

 

[fast0]

Yes.
Your CPU is heating up, and when you restart it cools down very slightly, but not as much as the last time, so it gets hotter and hotter until finally its so hot that it can't POST nomore.

Makes sense to me.
If I ran my 1 GHz thunderbird without a fan, I'd be crying.

 

[AndyHui]

You MUST have a CPU fan....the heat in a CPU builds up in a very concentrated area VERY quickly and gets very hot.....enough to fry your CPU. NEVER try to use a CPU without a fan....unless it's a 386.

 

[Smith]

Call the fire department !

W/O a fan you risk permanent damage to your CPU.

Why did you NOT think you needed one ? Just curious...

 

[DaddyG]

Jeff,

Its hard to tell from your post if you have a cpu fan or not. I have heard of problems similar to yours with some mobos that 'freak out' in the bios due to noise on the fan rpm monitoring line. If you have a fan, which you must have, try connecting it directly to a power supply plug instead of a mobo header.

 

[BurnItDwn]

you could underclock it to 66mhz FSB and lower teh voltage a lot ... adn then you wont need the fan ... hehehe

 

[Jeff444]

Thank you for help, all !

 

[IsOs]

Did you say you did not have a fan on your cpu? Did you have any other air blowing into the cpu? Did you have a heat sink at least?

Why not a cpu fan for this installation when you use them on other computers your build?

I'm just curious...

 

[wj]

Burn Baby Burn

I Fried a processor one time by booting it with out a heatsink/fan, took about 20 sec. cooked the end of my finger to.


wj

 

[Syborg1211]

Well, Intel processors give out much less heat than amd chips. My p3 700 runs 854 at 1.7 volts just fine with no fan at all. But of course, that is with one awesome heatsink, Alpha PEP66. If I left my case open with no cpu fan, it was actually the same temp as with the fan on and the case closed. I leave the case open now because the noise is no problem when you have no fans.

 

[Fish54]

As a matter of fact, I know that Compaq shipped a lot of thier lower end K6-2 lines without fans, so it can be done. I'm not sure what kind of wattage a PIII 700 puts out, but a K6-2 400 is somewhere around 22W...
-Fish

 

[wj]

I have seen an IBM with 2 PIII 550 Processor with just the heatsinks. Its in a server at work, but they were big heatsinks and these were slot ones. So I would say yes you can run chips with just the heatsink and no fans. But they need some kind of air blowing across them.


wj

 

[AndyHui]

With most lower speed CPUs, you can almost always get away with just a heatsink and not need a fan as long as the heatsink has a massive surface area. Most cases have some sort of airflow in them anyway.....the power supply is usually the source of the airflow.