I am using MacPro3,1 (early 2008) with Processor "Intel® Xeon(R) CPU X5482 @ 3.20GHz × 8 " and Graphics "GeForce 8800 GT/PCIe/SSE2". I just want to upgrade my graphics card to any CUDA-capable NVIDIA GeForce like one GeForce GTX 970. Will it works on my machine? I am using ubuntu. Please let me know if it works.