Your SandyBridge CPU only supports PCIe 2.0... The card will run 2.0 Spec.
The card is new enough that you shouldn't experience any compatibility issues. If the BIOS has a GPU Gen Option (default Auto) changing to Gen2 might be required.
Be sure to completely uninstall whatever graphic drivers are currently there now. Update your chipset INF drivers and HD3000 drivers BEFORE installing the new card. Ensure it gets installed in a x16 slot for best performance.