Guys, after 2 years of use, the connectors detached from the extension port pins and I almost suffered damage. I probably caught it in time and got lucky, and I might be at fault due to improper use, but in general, be careful with these gadgets, especially when it comes to expensive hardware. Other than that, it held up just fine for 2 years, even with rough handling.

PCIX 3.0 and short at 20cm. It will perform no matter how you install it. Very mediocre build quality and cable feel, definitely not worth 37-38€.