My fan is going crazy!

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http://forums.fedoraforum.org – It's either the fan on my graphics card or the fan on my cpu, but it has gotten REALLY LOUD as of yesterday . . . Is this a Fedora thing, or should I open up my computer, clean it, and maybe order more cooling paste? I have an extension already that lets me control the gpu fan from high to low, and I always have it set on low . . . I just hope my computer doesn't burn out :( (HowTos)