Tuning and Benchmarking a Dell GX 270 SFF - upgrading the AGP video card

As seen earlier, maxing out memory and adding a dedicated video card only produced an approximate 10% performance increase. I wanted to see just how good the NVIDIA GeForce MX440 AGP card was so I went to the Passmark software site at  http://www.videocardbenchmark.net/low_end_gpus.html to compare low end video cards. I discovered that the MX440 card was really low end, scoring only a 4. I looked around for some better cards realizing I had a double handicap. First, the video slot on the GX 270 SFF was AGP and second, only a half height card would fit in the SFF case. This eliminated a LOT of cards. Looking on eBay eliminated a lot more. Eventually I found a Radeon X1300 that was AGP and half height. I got it cheap and if it works I should get a big graphics boost as it it much faster than the MX 440 - see the test page at http://www.videocardbenchmark.net/gpu.php?gpu=Radeon+X1300 where it scored a 57!
Here is a pic:

I'm going to put it in the GX 270, swapping out the NVIDIA card, and hope I don't have driver problems.