Hi, dudes!
I created this topic to help everyone who has a GeForce 9500GT GPU and would like to use OpenCore (It can also be a help with other NVIDIA Legacy GPU's). I spent a lot of time using Clover, but my PC never got the best performance possible. At the same time, using OpenCore I got the expected performance, but I couldn't inject NVIDIA, so I had unaccelerated graphics. After a lot of study I finally managed to set up a 100% EFI for me.
SCREENSHOT
My PC is:
Motherboard Intel DH61CR
Intel Pentium G2030 @3.00Ghz
Kingston 1x4GB DDR3 1333MHz
EVGA GeForce 9500GT
Ethernet Intel 82579V
Audio Realtek ALC892
SSD SATA Netac 256GB
The Full NVIDIA Patch guide I followed is one from Dortania (here). The main configuration place for GPU Injection is in "DeviceProperties" -> "Add" -> "YourGPUPCIDevicePath" (eg: PciRoot(0x0)/...), and then some parameters need to be set according to your video card (follow Dortania's guide). It's important to remember that my config.plist should be used only as a Base/Model if your hardware isn't exactly the same, because my configuration is hybrid (6-series motherboard with an Ivy Bridge processor).
Hope this helps someone.
EFI_9500GT_IvyBridge_OC.zip