I have checked my user manual and came to know that My Motherboard name is Zotac Nvidia Geforce 6100 value (NF-MCP61P is the name of Chipset)
In Technical Spes it is written that it supports PCIe X16 1.1 but inside brief description of PCI Expansion slot,it is written complaint with PCIE 2.0 Specifications.
Now I am not able to understand it is v1.1 or v2.0?