My friend want to gpu mine on his computer. The motherboard is an old pegatron corporation 2AB5. His pci connectors are 2.0.
I think this is not a problem for mining, but wanted to confirm.
Thanks
You really need to DYOR and familiarize yourself with technology before posting a question like this. I'm not trying to pick on you, but you gave seriously wrong information. The omission of a single letter completely changes your post. MATHReX is correct when he says that No modern graphics card are compatible with PCI slots. However, that motherboard does not have PCI slots. It has PCI-e slots. That is a huge difference.
The answer toy your question is that your friend should have no problems mining on that motherboard.
http://www.findlaptopdriver.com/pegatron-2ab5-motherboard-corporation-specs/