I just got a delta 60x25 30 cFM , the fan spinn @ 5800 RPM but is rated by delta @ 5500 . This thing draw 0.30 A wich is very ballanced but how ever he can burn very easy a mobo header.
Anyway what i want to tell you is this :
I tested my SK6 with a Delta Black Label 7K , a Ystech 60MM @4500 RPM but real speed is 5000 RPM and this new delta @ 5800 RPM .
The Ystech in Prime95 give 5-6 /celsius more than delta 7K but this delta @ 5800 is only 2/Celsius more wich is awesome because the noise is way less loud than Delta 7K vacum cleaner .
So i replaced my Ystech with this and i hawe allways 3-4 degree better cooling with acceptable noise .

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-My P III 700E @ 1 GhZ RiG-
-SiSi/Sandra Bench.-