X1800XT Fan speed change on boot

[miragebym]

Just got a X1800XT 512 Sapphire, and when I boot up the fan is really loud and blowing hard but then it drops down in level after about 10 seconds and only blows lightly with little noise. I thought this might have been due to my 420W powersupply so I bought a 550W and it still does it.... Is this normal or is there something that I am missing?
Thanks in advance!
miRAGE

 

[turbo_mcgillicutty]

yea, its normal. I have a x1800xl and it does the same thing. When you first turn the power on the thing blows like hell until the board has a chance to initialize itself and make sure everything is A OK, then it will cycle the power down to keep from annoying the crap out of you. If you notice when you are playing a game, the fan will cycle back and forth between high speed and low speed modes. Its all normal.

 

[miragebym]

Thanks for the quick response and succinct info!

 

[Vokofpolisiekar]

Also, when your PC starts, the increase in temp on the GPU from 20C ambient with volts applied (remember, at startup the GPU almost runs 100%) is countered by the high fan speed. This ensures that you don't have a 20C to 50C spike, that surely will kill any electronics over time.