PCIe 2.0 motherboard slots are fully backward compatible with PCIe v1.x cards. PCIe 2.0 cards are also generally backward compatible with PCIe 1.x motherboards, using the available bandwidth of PCI Express 1.1. Overall, graphic cards or motherboards designed for v2.0 will work with the other being v1.1 or v1.0a.
Toereticky by nemel byt zadny problem.Muzete taky dat x16 kartu do x1 slotu a taky by dle teorie mela fungovat, pouze mnohem pomaleji.Vetsina zakladnich desek ale nema otvereny konec slotu na zakladni desce, tak bud musite ten kousek plastu vyriznout, nebo pouzit nejaky adapter http://www.orbitmicro.com/global/pexp16-sx-16-1-p-1648.html (ten sam neobsahuje zadnou elektroniku, jde pouze o mechanickou redukci).Pri startu PC by si mel BIOS s pridavnou PCIe kartou dohodnou pocet drah, takze x16 grafika v x1 slotu bude vyuzivat pouze 1 drahu.Takze teoreticky kdyz nejak doresite napajeni, tak muzete dat do notebookoveho miniPCIe slotu misto WiFi karty poradnou PCIe nVidia grafiku http://www.mironet.cz/delock-minipcie-riser-kartepcie-x1+dp156840/Because we can!