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Fan spins at full speed on boot

post #1 of 14
Thread Starter 
the fan on my GTS 450 has recently started spinning at full speed for a few seconds on startup. I don't know what causes it, and I know it doesn't really affect much, but it gets more annoying every time I hear it, because it is quite loud.
Why would it be doing this and how might I fix it?
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Thelonius
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post #2 of 14
Quote:
Originally Posted by Katcilla View Post
the fan on my GTS 450 has recently started spinning at full speed for a few seconds on startup. I don't know what causes it, and I know it doesn't really affect much, but it gets more annoying every time I hear it, because it is quite loud.
Why would it be doing this and how might I fix it?
Did it not always do this?

I don't think this is anything to worry about, but agree that it can be annoying. Years ago I went through most of ATI's X1*** series and each one did the same thing.

My guess at the reasoning behind it is that if the card overheats and forces a system reboot, the card gets max cooling as soon as possible.

If you wanted to stop this from happening, I think you would have to look into changing the cards bios. From what I've read, this is always risky, and probably not worth it. That's as far as I know, there might be a simple way to do this that I'm unaware of.
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post #3 of 14
Thread Starter 
Ok, I guess I'll have to deal with it. It is weird that it never did it until recently, though. Thanks!
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post #4 of 14
It's a safety built in for 2 reasons.

1) Initial start up puts a bunch of power through the card probably pretty close to full load, you know this because a fresh start up GPU temp always drop a few degrees on idle.
2) So you know your fan is working.

It should be music to an enthusiasts ears really.
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post #5 of 14
Maxxa is right. My GTX460s both do it too, as did my previoous 460-768s. It's a sign all is well, quit being irritated by green lights and go
The only way to stop the sound is to go for water cooling, or replace the coolers on the cards. Anything run from the onboard fan connector will do just the same.
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post #6 of 14
Quote:
Originally Posted by Katcilla View Post
Ok, I guess I'll have to deal with it. It is weird that it never did it until recently, though. Thanks!
Hmmm, if it definitely never did it before, you might want to continue looking into it. I do know that temperature sensors can be come 'stuck' and sometimes need some dramatic change in temperature before they read accurately. It may be that when your card first powers up, the sensors read very high, then once up and running they settle at the correct values, bringing the fan speed down. Although this is speculation.

If the card works fine and the fan speed increases as one would expect under load, and decreases once idle, I shouldn't think of it as a problem.
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post #7 of 14
Quote:
Originally Posted by Maxxa View Post
It's a safety built in for 2 reasons.

1) Initial start up puts a bunch of power through the card probably pretty close to full load, you know this because a fresh start up GPU temp always drop a few degrees on idle.
2) So you know your fan is working.

It should be music to an enthusiasts ears really.
first time i started up my 6990 i almonst had a heart attack when that hit 100%. but now yea, i always eagerly wait for it
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post #8 of 14
Have you changed drivers or been using any OC utility for the card?

Many times it does this as a safety measure. When booting, the card may not know it's temp, so as default, it goes full speed. Once drivers and such are loaded, it can sort itself out and runs as it should.
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post #9 of 14
Thread Starter 
I figured it was a safety measure. My main reason for checking up is the fact that it never did it before, at least to my memory.
I update my drivers as regularly as possible, so I don't think it was a driver issue when it wasn't doing it.
I have thought of a reason why it's started doing it just recently. I've just upgraded from a 450w to a 600w PSU, could the extra wattage be giving the 450 the power it actually needs to speed up the fan?
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Thelonius
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post #10 of 14
My 580 never did.
Only when I got a bad card it did it once and then konked out.
Maybe ur card is in its last legs.
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