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System Lenovo G40-70 (This may work with these other Lenovo laptops which share the platform: G40-30, G40-45, G40-70m, Z40-70, Z40-75, G40-80) CPU: Intel Core i7-4510U, 2.6 GHz iGPU: Intel HD Graphics 4400, 1024 Mb RAM: 8 Gb DDR3 OS: Windows 10 x64 Setup eGPU Board: Bplus PE4C v4.1 with M.2 Key A/E (http://www.mfactors.com/pe4c-v4-1-pci-express-16x-card-to-m-2-card-or-pcie-x4-connecter/ Model: PE4C-M2060A) Video Card: MSI Radeon R5450, 1024 Mb GDDR5 Power: Antec 430W External Monitor: Asus VE228 Tools Used DIY eGPU (https://www.techinferno.com/index.php?/files/file/87-diy-e-gpu-setup-130-by-Tech Inferno Fan/) HWiNFO64 (https://www.hwinfo.com/download.php) Phillips Screwdriver Dremel Heat Gun Sugru Packing Tape The Build To run DIY eGPU, Windows has to be installed in a non-UEFI boot mode. Here are my current BIOS settings: Once Windows was re-installed, I installed WiNFO64. Here's what the hardware looked like prior to installing the PE4C in place of the wireless card: Then I installed DIY eGPU by right-clicking on setup-disk-image.bat and running as Admin: Rebooting and selecting DIY eGPU Setup 1.30: Then "menu-based": There's the Atheros wireless card in the DIY eGPU hardware list: Shutting down I then removing the wireless card: I then used a Ryobi dremel clone to slice off a portion of the laptop's plastic case and chamfer the edge off of the CD drive connector. This was necessary to get the cable to fit into the PCIe slot and tuck the cable up so that the laptop is able to sit level on a desk. I also cut a notch into the removable cover on the bottom of the laptop: I used a heat gun to soften the hot glue inside of the heat shrink on the plug, so that I could slightly bend it to fit: (Note: That is a cat hair, not a manky man hair.) A blob of Sugru: And some masking tape keep the cable secure, while letting me remove it relatively easily: I plugged my MSI video card into the PE4C, kept the Delay and Settings switches at their stock positions, turned on the ATX power supply and booted the laptop into DIY eGPU. And there's the video card listed in the hardware where the wireless card used to be: Then i ran PCI Compaction: I was unable to return to the DIY eGPU menu: So I just rebooted into Windows and ran WiNFO64 to check that the external video card was detected: Then I installed the latest Radeon drivers, & connected up my second monitor. I now have dual display with the second monitor set as my Primary and the laptop's display below it as the Secondary. Quality-wise I've been able to run games that my laptop alone couldn't handle, such as the We Happy Few alpha. The low-end frame rate isn't great, but with some overclocking using MSI Afterburner it's doing pretty well. As the card is sitting out in the open it doesn't overheat. I'm not sure if this matters or not but I ran.. or at least tried to run.. three different benchmark apps: 3D Mark Demo (wouldn't run), MSI Kombuster 2 (also wouldn't run) and Heaven benchmark. Stock FPS: 14.0 Score: 352 Min FPS: 5.7 Max FPS: 25.3 Very Basic Overclock FPS: 13.8 Score: 347 Min FPS: 10.4 Max FPS: 24.6 Next steps might include a different power supply, so I can put the ATX I'm currently using back into the 3d printer, and perhaps a case for the PE4C & video card. Maybe someday a better video card. I hope this has been helpful for someone. Please ask me questions if you have any. Note: This is my second PE4C, as the first one I purchased would not work no matter what I tried. They eventually RMA'd it and I bought a second one which worked out of the box, first try. \o/

Hello. I have a Lenovo G40-70 that I'm trying to add an eGPU to, it has an Intel Core i7-4510U CPU, 8GB of RAM, and onboard Intel HD Graphics 4400. I bought a Bplus PE4C v4.1 with the M.2 A/E key, and a Sapphire Radeon R7 240. The power supply is an Antec ATX 430W. I started trying to get it running on Win 10 64bit, but as that was installed with UEFI I couldn't run DIY eGPU. I've since installed Win 8.1 Pro 64bit using "Legacy" mode. For testing I'm using HWiNFO64 to check the status of the system's PCI Express bus.. the tree for which looks like this: Bus - PCI Bus #0 - Intel Lynx Point-LP - PCI Express Root Port #3 - PCI Express x1 Bus #1 - RealTek Semiconductor etc. etc. - Intel Lynx Point-LP - PCI Express Root Port #4 - PCI Express x1 Bus #2 Bus #2 is where my laptop's Wifi was plugged in, and has been swapped out for the eGPU. At first I had no luck at all with getting the eGPU to show up. So I tried going through every combination of Delay and Settings configuration of the switches on the PE4C. I tried booting with the wifi installed, sleeping, swapping in the powered up eGPU and nothing. Tried booting with the eGPU powered up, booting with it powered off. Still nothing. Tried taping over line 22 on the PE4C's key. No change. I purchased the DIY eGPU app and have been trying to figure it out, but initially I wasn't able to get the eGPU to appear in DIY either. I'm not 100% certain what happened but during yet another boot into DIY, with the PE4C switches set to stock.. first position on each switch.. no special power up on the PE4C.. suddenly my eGPU was there! It had found it!! I have no idea what had changed, but it was working. I ran a few of the commands in DIY eGPU which only work on a found eGPU. Didn't really understand any of the output though. So I crossed my fingers and rebooted into Windows and found that it was still working! The video card showed up in HWiNFO, so I installed video drivers, rebooted, still working. I had video out put to both the external monitor and my laptop's screen.. dual monitors, not mirrors. Thinking the worst was over I began setting up Steam. A short time later my external monitor suddenly cut out, and then my laptop locked up. Reboot. The eGPU was still working.. but my internet connection was messed up for about 10 min, before finally coming back. The LAN hardware is in PCIe Bus #1 so maybe there was some kind of 'crosstalk' with the video card on PCIe Bus #2? About 15 min later, the output to the external monitor died and the laptop locked up again. I shut down, removed the PE4C's key from the PCIe slot and rebooted. The onboard GPU worked normally and no crashes. A while later I re-installed the PE4C's key and found that my system could no longer find the eGPU. I've been poking around this forum looking for possible solutions, and booting into DIY eGPU to try and make sense of it all. But I think it's time to reach out and see if anyone can suggest a course of action... I've tried to run "Compact All except..." in DIY with the default range, and it appears to run, but then I'm unable to return to the GUI due to "C: DOS area: sector not found" error. So I ran the command which logs the compact attempt and I'm attaching the C:\diag folder to this post. Please let me know if you have any suggestions or if there's any more info you'd like me to provide. I have photos of the handful of tests I ran in DIY when the video card was detected, and I can provide them if you think they might help. Thank you. diag.zip