Luckily, your HDMI still works so plug your monitor or TV there. I think this is due to LION is reading the PCI Roots of the GTX 295 in reverse order in comparison to SL. You WIL loose the full acceleration and also the DVIs ports (Meaning only 1 pcb will be working). after booting to your partition 'installer' (that the above guide makes you do).Buy Lion (after FEB 2012) 10.7.3 is the default.Sign in to your App Store (which apparently only cares about 'en0) which mine at the time was the wifi.In extreme cases 'arch=i386' or even extreme(r) '-x' Restart (if there is a GRAPHICS problem like black screen.'your hex values or long # replaces this text and colons' remember that u need to insert it like this.copy the 'hex' string number after clicking on 'DUAL PCB.' to your ''.Scroll down to 'Instructions' and download the EFIpack 1.2.I used this method Nvidia GTX 295 EFIpack 1.2 Method.My wireless keyboard and mouse were recognize without any kexts.I got the graphics working with 10.6.8, BUT no LAN/Ethernet working so i couldn't use the App Store at all.I'm using 10.6.6 Combo Update in order to use the APP Store and upgrade to LION.Download and install the combo update 10.6.6 (Do not restart).Graphics card is dual pcb, but only 1 pcb was working.WIFI Broadcom 1505 (14e4,4328) working out the box.LAN not working.Install (format ur HDD for fresh isntallation)and boot with no flags again.I tried a bunch of combinations before, BUT only messed up the booting process.no flags requiered(u can use -v just to see what's going on).I used the Clean Retail method for both SL and Lion.No changes on Bios requiered besides set to AHCI.Graphics NOW are working with drivers (No EFIstring).Processor Speed: 2.67 GHz (I don't think all Threads are working only the 4 cores).Wifi= Broadcom 1505 (it's a PCI card, NO usb).Graphics Card: Nvidia GTX 295 (dual PCB).HDD: WD Velociraptor 10,000 Rpm 600Gb (Running Mac).Motherboard: MS-7591 v1.0 from Alienware/Dell?.

Video card for mac pro a11 86