Gpu Passthrough for guest WebGL availability

Hello.

I have esxi 5.5.0 installed on a custom built pc.

Gigabyte motherboard with i5 3470 cpu and dedicated geforce gtx 260 and one pci intel 1000mbps nic.

I went to config->advanced then ticked the vga gtx 260 adapter for passthrough, rebooted the hypervisor.

I installed windows 7 sp1 64bit as guest inside esxi and vmware tools (complete).

http://s20.postimg.org/on6588we5/screenshot_34.png

then i installed latest nvidia drivers but in the device manager it shows

http://s20.postimg.org/m20kkq70d/screenshot_31.png

even if dxdiag tells me all 3d is enabled

http://s20.postimg.org/x2vppqz99/screenshot_32.png

i still can't work with webgl

http://s20.postimg.org/ikyihr7y5/screenshot_33.png

How do i properly enable that geforce 260 ?

And ultimately how do i make webgl available ?