To quote, roughly translated: Uploaded version 1.7, which theoretically supports all PS3 firmwares (If you see a problem, and I correct red phone )
Fan Control Utility v1.7 Changelog:
Accepted CEX/DEX based CFW's
For those unaware, PlayStation 3 Control Fan Utility is an application that let you set the speed of the fan for your PS3 console or install a payload that runs behind games and controls the fan speed to keep the temperature under a certain reading.
The utility is intended to work on CFW CEX/DEX 3.41, 3.55, 4.21, 4.30, 4.31, 4.40 and 4.41. There has been expanded support for more CEX Based CFW's in recent updates like support for CFW 4.41 and all DEX firmwares. Rebug 4.30.2 DREX works just fine in DEX mode as well.
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
but if you set it on manual mode and in static fan speed that is high enough set mine slighly louder on my fan, and it get my CPU and GPU temps really cool, even the PS3 casing that should be really hot when I use it after an hour and now the casing stay cool all the time