Lost Nvidia Geforce 310M

My graphic card disappeared from my asus. I was trying to load latest linux nvidia drivers (with modprobe nvidia) to use the Nvidia Geforce 310m under linux but it told me no such device. The card is also missing in lspci output when I boot Gentoo. And it is not showing anymore in Windows device manager. I only got the Intel HD video driver. Actually, I am not sure anymore about seeing Nvidia driver there... This started to drive me crazy until I read my previous post and saw the line I was looking for :

01:00.0 VGA compatible controller: nVidia Corporation GT218 [GeForce 310M] (rev a2)

I did not find anything disabled in the BIOS. As far as I remember, I only switched boot devices (well using Esc key let you choose the booting device). Well I am currently restoring the four AI Recovery backup DVD and I will see if it helps... The card is still missing after recovery. I just filed a case on Asus support web site... Follow up in comments.