eGPU in an optical bay

Hi all.

I'm a newbie here, I don't even know whether I can make my laptop eGPU compatible, but I'm desperate. I would like to make it work in an optical bay just to make it portable. I've recently purchased a GT 630 card which fits into an optical bay without the passive cooler (115mm x 69mm x 12mm, ASUS GT630-SL-2GD3-L ). This card uses a Kepler-based GPU with 384 CUDA cores, 64bit memory interface, an x4 pci-e interface, and consumes 25W according to nVidia. I know that this card does not provide much performance compared to the high-end cards, but I think it would provide enough boost compared to my Intel HD 3000 graphics to play Starcraft II in medium-high.
Here is the plan:
1. I would transform a slim SATA frame ( Delock Slim SATA 5.25″ Installation Frame for 1 x 2.5″ SATA HDD) to house the card. The outer frame of the caddy would be elilminated, so the HDMI and DVI ports could be accessed (VGA port will be detached completely).
2. I would swap the passive cooler with a thin active one, maybe a suitable "laptop-style heatpipe" - blower combo. 25W wouldn't require much cooling I hope...
3. Maybe I try to acquire some power from the inside of the laptop. What do you think, could this be accomplished somehow or the only chance to feed the card is via an external power supply? I saw that the slim SATA power connector may supply 1.5A per one 5V wire and it has two of them, at least that's what I've found in the specification, so that's not enough (1.5x2x5 = 15W at most).
4. I would like to use mPCIe, with the following riser, which would just fit into the optical bay:
Delock Riser card Mini PCI Express > PCI Express x1. Is this enough alone or should I also buy a PE4L 2.1 ?
The "rest" of the hardware: DELL E5520 with a Sandy Bridge i5-2520M, 4GB memory (would it work at all ).
I'm still in the hardware acquisition phase (laptop, caddy, card is already owned), but any experiences or inputs would be highly appreciated.

 

Well...the riser card has just arrived. I plugged the mini PCIe end, connected an ATX power supply via the floppy molex connector and the HDTV to the HDMI connector of the card.
- Windows booted, no picture on the internal LCD, just on the HDTV. It displayed: 1920x1080 60Hz, but resolution was 640x480 I guess.
- GeForce driver was installed properly, then I restarted Windows.

Now situation is the following:
1.) no ATX power supplied to the card before boot: laptop starts with the internal display, Windows doesn't discover the card when starting ATX power supply after boot.
2.) ATX power supplied to the card before boot: sometimes laptop starts with the HDTV, Windows logo appears, then it shows "No signal" when the resolution should change and the logon screen should appear, laptop display is also blank. Sometimes there is blank screen on the HDTV and on the laptop display as well when trying to boot.

Do you have an idea, what should I try in this case?

 

So you're going in through the mcpie port inside the laptop, using power from the bay, and just using the bay as housing? You're not trying to use the laptop sata bay port as the interface right? (To my knowledge the bay port doesn't have a pcie lane)

if you're doing the former, then everything should work as expected just like a regular egpu. Maybe a power or driver problem at this point? I use my bay as an extra drive but I'm curious to follow this project and see where you get with it.