Hi. I am a newbie. I am planing to make an eGPU for my Thinkpad X230 Tablet. I am considering between PE4H between PE4L. I know that PE4L in PCI x1 but PE4H is PCI x16. If I connect 16x PCI express GPU to PE4L, does it affect the performance? I know that 16x has more bandwidth than 1x. Between PE4H and PE4L, what version should I buy? Why I bought this graphic card: Shapphire Randeon HD 7950, which is PCI 3.0. Does it compatible with the system I am about to make? (Thinkpad X230 tablet, PE4L ver 2.1b)? Will I experience the bottleneck with the system? Thank you.