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I really don't understand why he wants me to use his bios :S feels kind of creepy, it's like he wants to molest my computer.

If using a NVidia Fermi/Keplar eGPU and wanting the features provided by x1.2Opt (pci-e compression and internal LCD mode) rather than x1 2.0 then yes, you would need Setup 1.1x to disable the W530's NVidia dGPU since the bios doesn't provide that facility. That allows the eGPU to engage those features rather than the dGPU. If are OK with just x1 2.0 performance and don't care for internal LCD mode, then can bootup without using Setup 1.1x. For the latter case you may even want to get a AMD eGPU which does give slightly better performance. REF: i5-3320M + GTX660/HD7870. Now if LucidLogix Virtu worked on Series-7 mobile systems I'd be suggesting go for an AMD eGPU + Virtu. If wanting to avoid using Setup 1.1x but still use a NVidia eGPU at x1.2Opt then consider a notebook that has a iGPU only, eg: Lenovo T430/T530, HP 8470P/8570P or 6470b/6570b, Dell Latitude E6430/E6530 or Vostro 3460/3560. They tend to be cheaper than the workstation class systems like the W530 or Dell M4700. Do note that there has been reports of Lenovo notebooks having very poor eGPU performance when equipped with 16GB of RAM where reducing it to 8GB solves the issue. You could even consider a Thunderbolt-equipped notebook if wanting faster eGPU performance: a Macbook or certain Lenovo T430s/S430 systems.

pull the battery out,also the AC plug,press the power button,after that put AC back in and be happy

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Expanded steps 1 to 3 for

<span style="font-size:large">Briefly: i5-3210M 2.5 13" MBP + TH05 + GTX660@x2 2.0 Win8 DIY eGPU implementation</span> I managed to get my hands on a 2012 13" Macbook Pro which I paired successfully with a TH05 + GTX660 + Win8. I concur the findings of users Shelltoe and oripash - there are two ways of installing Win8 which significantly affect the ease of eGPU use. The first (UEFI MODE) requires a little more skill to get Win8 loaded initially but the eGPU functionality is plug-and-play thereafter. It's the recommended mode to use. The second (BIOS MODE) is the default Bootcamp 4.0/5.0 method so it's likely users will find themselves in this less desirable mode. More details of both are below: 1. UEFI MODE [recommended] If install Win8 using oripash's guide http://forum.techinferno.com/diy-e-gpu-projects/2494-macbook-air-11-2012-gtx-660ti-%40-2-2-no-opt.html#post33280 and Teknotronix' http://forum.techinferno.com/diy-e-gpu-projects/2385-17-macbook-pro-late-2011-th05-win-8-setup-guide.html#post31839 then just need to set TH05 SW1=1 (PERST# from PortRidge), SW2=2-3 (x2..x16) . Boot into Win8 where the eGPU will work out of the box. There will be no error 12. It's a plug-and-play configuration. Unlike Teknotronix, I found no need to use a surrogate system to install the UEFI version of Win8. I could boot the MBP, hit ALT key and select either the Win8 Pro MSDN Installation DVD or USB stick copy of it and perform the installation. Only important point being I had to select the "EFI" DVD or USB stick. 2. BIOS MODE [avoid if possible] A Bootcamped MBP runs a MBR type partition system. It requires a special sequence to get the eGPU detected. I found Win8 would *always* get an error 12 against the eGPU and if don't get the timing right I could end up with either no eGPU on the PCI BUS or if use the TH05 setting as UEFI mode above (SW1=1), the Macbook will power itself off when trying to boot Win8. The 100% successful method to get the eGPU on the PCI BUS in this mode is to set SW1=3 (6.9s), SW2=2-3 (x2..x16) on the TH05, poweron the eGPU+TH05, poweron the Macbook. Hit ALT during boot to get a boot selection. Watch the RED PERST# LED on the TH05. When it's no longer red then the eGPU is on the PCI BUS so can select your required OS. It's also possible to flick switch SW1 to SW1=2 (500ms) to hasten the process of getting PERST# to no longer be RED while at the ALT screen or Setup 1.1x screen if the delay is too long for your system. The delay turns out to be more like 30s than 6.9s. The most convenient fix for the error 12 that will be seen in Windows 8 is: <ol><li>Install Setup 1.1x onto a USB stick. <li>Configure it's \config\pci.bat to contain a replica of the same configuration UEFI boot uses for the eGPU, captured and translated below: <li>Configure the \config\startup.bat to do the pci-e fixups and then chainload to Win8. <li>Confirm this fixes error 12 against the eGPU as it did for me.</ol> Once confirmed to work, streamline this into the more convenient and faster booting disk image install of Setup 1.1x. It's more convenient as you'll no longer need to hit ALT to boot the USB stick. Instead, you'll have a DIY eGPU Setup 1.x Win8 bootitem. Proceed to copy your \config\pci.bat and \config\startup.bat from your USB stick to the Setup 1.1x disk image V:\config directory as mounted within Win8. The reason can't just use the disk image install for everything is because a Macbook doesn't do the disk mapping correctly so can't be used within the Setup 1.1x pre-boot environment to configure the system. Instead, the USB stick is used for initial configuration and when done, the pertinent configuration files copied across to the disk image for read-only access.