yes it's true the recharging calculation time doesnt seem to work in the right way .... only % works fine here ...

I used xBench for testing.

iMAc has an old ATI 1600 128MB and the test gave me 210, only 80 with geforce !!!!
yes, not DDR3 memory, but anyway the difference is too much !!!

Maybe is it because I used your VGA string?

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Acer 6935g & Snow leopard 10.6.1 64 bit

Core2Duo P8600 2,4Ghz | 4GB DDR3 1066 |
Nvidia 9600m GT 1GB QE+CI @ 1920x1080 Full HD
Broadcom 1490 Wifi (native airport)
Audio | Ethernet | Bluetooth | Webcam | eSATA II | BlueRay DVD drive