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Found 3 results

  1. Hi, I'm having problems trying to connect a GTX 750 Ti to my Lenovo T420 using the dock EXP GDC Beast (express card version). My laptop: Lenovo T420 RAM: 8GB DDR3 CPU: Intel Core i5 2520M GPU: Intel HD Graphics 3000 My problem is: if I plug the express card and I turn on the laptop it doesn't boot up and the screen becomes horrible, with coloured pixels and a sound like "bip-bip". If I try plugging the express card when the laptop is already turned on it sees the gpu, but if try installing the drivers I have to apply the modifies restarting the computer. I hope you understood my problem (I don't speak English very well). Please help me, It's making me crazy! EDIT: I didn't say that if I plug the express card when the pc is already turned on, in the device menager there is "Error 12" on the gtx 750 ti
  2. Problem description 1. What's the problem? I have hooked up my eGPU through the ExpressCard Slot. I have installed all drivers. Under Device Manager it shows my eGPU. Sometimes it will show up with an error 12 but most of the time it does not. When I plug in the HDMI port to my TV, my TV acts like to it received a signal and fails displaying no signal. 2. Have you consulted the Troubleshooting FAQ to resolve the issue? I believe I have delved into it thoroughly but nothing has worked. Thank you for getting me this far, I have been at this for days. 3. Have you consulted the Pre-Purchase FAQ --> "2. How can I check if my notebook is compatible with an eGPU?" Yes, I have also seen many videos and posts of people using my exact same laptop with wonderful success. Platform Description Lenovo ThinkPad T420 Windows 7 64bit SP1 8gb Ram XFX Radeon HD 6870 EVGA 400W PSU [+12V Max Current = 30 Amps] PE4C-EC060A V3.0 ( eGPU PCIe x16 interface for ExpressCard) Notes There are two-3 position switches located on the board. I have them set at their default 1 and 1. The legend on the board notes this: SW1 - PERST# Delay - 1 | Disable - 2 | 9.8 seconds - 3 | 14.8 seconds SW2 - CLK Delay - 1 | Disable - 2 | 11.97 seconds - 3 | 16.9 seconds I have tried these in every possible combination. Any help resolving these issues would be greatly appreciated.
  3. Hey guys, just wanted to make a thread to document my process in implementing an eGPU with my T420. Lenovo T420 without NVS 4200M Modded BIOS 1.46 (enables higher clocks on RAM + more) i5 2540M @ 2.60 GHZ (Boost to 3.3? verifiy) 2x8 (16) GB DDR3 RAM @ 1866 Mhz Intel HD3000 MSI GeForce GTX 950 2GD5 OC 2GB 128-Bit GDDR5 PE4C 3.0 EC Dell Optiplex GX620/SX280 DA-2 220W AC Adapter About 5 years ago I dabbled with eGPU. T420 with NVS 4200M using a PE4L and a GTX 560ti. To use this I needed to run DIY eGPU Setup 1.x due to the TOLUD problem. The setup worked, but was a bit complicated/bloated. (having to chainload the setup, not being able to plug and play, having to restart if you wanted to use eGPU) I rediscovered eGPU and read recent results. People were able to plug and play their eGPU setup without all the hassle. I wanted to try this. I started off with the T420 with NVS 4200m, but couldn't get a setup that would work plug and play style. I bought DIY eGPU Setup 1.3 and found out that it could only be setup on a system in MBR, not GPT. Before I changed my harddrive, I dabbled with the modded BIOS and found a TOLUD setting. While changing a bunch of BIOS settings at the same time (dumb, I know) and ended up bricking my system. I tried to use WINCRISIS to create a bootable USB with an older BIOS to restore my system, but that did not work. I ended up buying a new motherboard without the NVS 4200M. After all of that hassle, I restored my system, reinstalled Windows on an MBR hard drive and began my setup. I hooked up the eGPU, installed the latest _notebook_ NVIDIA drivers, and boom, everything works without hassle. I can boot up with my eGPU plugged in, I can put my system to sleep, unplug/plug and everything works. Optimus is working properly, running low end applications off of HD3000, and higher end applications of the 950. Some apps I have to force to use the 950 via the NVIDIA Control Panel. There is also an option in the control panel to add a context menu item, NVIDIA Control Panel>Desktop> Add Run with graphics processor. My current benchmark in Fire Strike is 4210, which seems low, but comparing it to other scores, I am in the right area for similar setups. My take aways from my experience: dGPU is a pain. If I hadn't messed up my system by messing with the BIOS, I am sure that DIY eGPU Setup would have been the way to go. But I possibly could have changed my TOLUD in my BIOS to get the plug and play system to work. (I don't want to test this because I don't want to accidentally brick my system again) Up next is more benchmarks, overclocking, optimization, and building an enclosure for my setup. Pics of the setup: http://imgur.com/1Hpjiq7,ADwQqEO,1LAAGOP Thanks for reading.
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