I've had a GeForce MX 440 in the past (friend gave it to me for free) and it is pretty horrible, as people have stated. While I've only run UT2004 with my Radeon 9600 Pro on this computer (AMD 2500+, 1 GIG DDR RAM), other games such as Battlefield 1942, Wolfenstein: Enemy Territory, and even Neverwinter Nights run drastically better with this card. My brothers now use the GF4MX on their older computer (AMD 1.1 GHz, 384 MB SDRAM) and it can barely run Onslaught at 30fps. Obviously the CPU and RAM hurts there, but the card is still awful and I would not reccomend paying any kind of money for it.
Also: steer clear from any ATI card that has "SE" in the name and not "Pro" in the name; despite the fact that it may still be a "Radeon 9600," you won't get anywhere near the performance a 9600 Pro will get. While it's nice to get a video card for $70, you're going to be dissapointed.
These benchmarks show why; while they may be for UT2003, they still show the drastic difference pretty nicely. GF4MX 440: 27.8fps, Radeon 9600
SE: 29.3fps, Radeon 9600
Pro: 66.7fps.
You can get refurbished Radeon 9600 Pro's on newegg for
$100, and new ones for
$120. I think it's a much better deal.