I bought a Woodcrest Mac pro this morning. 2 2.66 GHz dual core Xeon's with a x1900XT graphics card. A friend of mine bought a new Mac Pro over the weekend and his came with a GT120, he bought a 4870 in store, and installed it him self, so he has the GT120 laying around. I was gonna get it from him and put it in my Mac Pro, I was wondering if it will actually work in my older Mac Pro. I don't see a reason why it wouldn't, but its better to ask and make sure.