I would say whining, (why-n ing). Look for user reviews to see if it is mentioned a lot for that brand, it could be just the way that brand is.
Is it just you that is annoyed by it?
What about other people, can they hear it and is it annoying to them?
If you find the noise unacceptable I would RAM i, after all, you have paid good money so you shold be satisfied with it.
Furmark stresses the card. Valley benchmark runs the same sequences every time so if you start with the loest setting at a given resolutions, you have a bench result that can be compared with other tests with different setting.