X230 PCI Express gen1-only

Hello,
I experience PCIe problems on my x230. Under both Linux and Windows (using http://eternallybored.org/misc/pciutils/) lspci -vvv shows that all devices use only a Gen1 link (2.5 GT/s), while they are all Gen2 (5.0 GT/s) capable.
I also attached a eGPU (NVidia Geforce 650 Ti) via express card and it also only uses 2.5GT/s (verifed with GPU-Z). Express card slot is set to "Automatic" in the BIOS.
Can anyone confirm or disprove this? What could be the problen?

Can anybody at least confirm that the issue is present (or not present) on their x230?
It goes without saying that this is a major performance loss, especially in the eGPU use case.

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