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
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.
Lenovo ThinkPad T420
Windows 7 64bit SP1
XFX Radeon HD 6870
EVGA 400W PSU [+12V Max Current = 30 Amps]
PE4C-EC060A V3.0 ( eGPU PCIe x16 interface for ExpressCard)
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.