Check out my system specs in my sig below. I have Vue 7i 7.4 right now because I can live until 8.0 comes out. I can say mine works fine for my Vue 7i but not about 7.5x or C4D, sorry.

Jeff

Development on: Mac Pro 2008, Duel-Boot OS - Snow Leopard 10.6.6 & Windows 7 Ultimate 64bit, 2 x 2.8 GHz Quad-Core Intel Xeon , 10GB 800 MHz DDR2 RAM, NVIDIA GeForce 8800GT.