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PrecastFlame

Problem with EXP GDC and GTX 750 Ti (ERROR 12)

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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

Edited by PrecastFlame

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