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15" Lenovo Y580 + GTX660@4Gbps+c-mPCIe2 (PE4L 2.1b) + Win8.1 [ blowntaha]


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How to setup an eGPU with Y580:

  1. Buy/get a PE4L-PM060A adaptor, GPU, and an appropirate PSU which is able to provide steady 12V/16A (or you can use two PSUs if your PSU can provide it but not at a steady rate.).
  2. Although not necessary, go ahead and download svl7's unlocked BIOS here. When I was troubleshooting my setup to get it working, I reverted to stock BIOS thinking the problem lied there, but eventually upon random startups, it would be buggy, and sometimes take a while AFTER rebooting for the display to switch from the internal LCD to an external monitor. Unlocking it lets you change an option that the stock does not allow, it also lets you tweak some other settings which may improve CPU performance.
  3. Go into the BIOS, and under configuration, change SWITCHABLE GRAPHICS to UMA GRAPHICS.

    1. If you've unlocked it, go to Advanced settings, then to Video settings, select PCI Graphics (or PCI express, ... I'm writing this from memory), then change primary display to Auto-selected. For some better CPU performance, go to the power tab, CPU settings, then disable C-States, disable MSR Lock, and set the last two settings to the maximum. You can do this by hitting f6/f5 (can't remember which) after highlighting the option. Hit F10 to save and exit. If you don't have Throttlestop 6.0 already, download it, start it, and go to TPL settings (which are now unlocked thanks to disabled MSR Lock), and change 26 to 56 for the time setting, then set the long and short TDP to however you see fit. I personally use 56 for long and 60 for short. Apply, OK. Uninstall your NVIDIA drivers (I recommend DDU) and Lenovo Power Management.

    2. Power down everything (duh) and plug the PE4L in the WiFi slot or the empty modem slot (WiFi slot is easier since you can screw it). Flip your laptop over so it is upright, making sure it's on a flat surface. Plug in your GPU and any necessary 6-pin cables from your PSU along with your SWEX. And last but not least the floppy molex, peripheral cable to 4 pin cable onto the PE4L adaptor itself. If you don't have SWEX, you can just grab a paperclip, cut it into a U shape, put one end on the green wire hole space thing on the 20/24 ping PSU power cable and the other end in any black one (there is a black wire right next to the green). Place electric tape over the exposed part of the paperclip to secure it.
      1. If by chance your PSU *should* be capable, but you are having issues (like me), you can use two PSUs by having the second PSU power the PE4L adapter using the floppy molex. Use a second SWEX if you have one, or do the paper clip method.

[*]Power up both PSUs (the GPU fan/s should be spinning), wait a second then turn on your y580, install drivers and enjoy.

I'll post pics later.

As I mentioned before, I'm using a GTX 660, non-Ti version.

3DMARK11.

6111 seems to be my max, since I can't push the clocks further than 1084/3225 core/mem, but it's probably that I don't have a "proper" PSU and/or know the right voltage.

Here's a vantage score, I only ran it once since I don't use it very often.

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