ATI RADEON X1900XT seems to work with FCP X

The 1900 seems to work with FCP X even though it doesn't meet the minimum requirements. Anyone know what I'm sacrificing in terms of performance? I brought in some files straight from the 7D, but didn't get to take it for a real test drive. (I had to jet back to the office. A total geek lunch break!)

2008 Mac Pro
1,1 4-core, 16GB ram

I wonder if it will work with Motion 5?

That is a good question. I haven't purchased Motion 5 yet. When I do, I'll post.

I just downloaded Motion 5. IT WORKS BABY!!!!!

Mac Pro 1, 1 - ATI Radeon HD 3870. Smoke that in your pipe, Apple

Shu-weeet!