I was bored and found back of my closet 2x 1000 RPM S-flex 92mm's and AC Accelero S1 Rev 2. The Sapphire's stock cooler does decent job but is audiable. I was almost pulling trigger on AC TwinTurbo Pro but hey, since I got Accelero S1 rev 2 why buy another.
The Sapphire HD 4850 512MB GDDR3 HDMI (now known as HD 4850) uses Sapphires own dual slot heatsink which is PWM controlled. The board is also very different from the reference design as VRM's are in front and have stock aluminium heatsink.
Stock cooler did decent job but nature of the fan, clear bristle fan, 80 mm blades means still quite nasty tone quality. So off it goes finally.
My victim awaits:
Stock cooler removed. Copper core is visible with a lot thermal goop.
Spahhire's board layout is different from reference model quite bit.
Close up from the GPU
New cooler Accelero S1 Rev 2 installed with 2x 92mm S-flexes ziptied ( 1000 rpm variants )
Stock VRM heatsink is tall but goes nice and limit with fins of Accelero S1 rev 2
Memory heatsinks stick nicely
Card up and running in P182
VGA is in Mid 30's now and with 2x92mm fans blowing so that VRM's get a lot air the sound quality has changed a lot better. I am quite happy the results even PCI-E power plug is now harder to access.