Ugh, integrated graphics FTL.
From a quick google search, looks like it's based off the Intel GMA X3100 IGP...actually that's what used to be in the old white macbooks (which were popular, might want to see what games they can play). Consensus was, nothing too fancy..
Here's an excerpt from a review that should help.
AnandTech: µATX Part 2: Intel G33 Performance Review
"The G33 was incapable of running Battlefield 2 and Supreme Commander. Offline testing with Quake 4 and Prey resulted in an interesting slide show that allowed us to see every detail of the benchmark session in a slow, excruciating fashion. Frankly, a visit to the dentist for a root canal almost seems like a better use of time. Not all modern games completely failed to run, however.
G33 was able to generate results (for this grouping) in Company of Heroes and Sims 2. Image quality generally favors the X1250 in most games we tested. The G33 had acceptable image quality but at times we could tell certain details were not as sharp or even evident when compared to the X1250 boards. While most people will not be buying these boards for gaming purposes without an external GPU solution, we did find that reducing the resolutions to 800x600 and slightly increasing the quality settings did result in a passable experience on a temporary basis in games the chipsets would run.
The graphics capabilities of these chipsets in gaming are best left for older RTS type games or DirectX 8 based FPS/RPG titles. Most kid oriented games should also run, provided they don't explicitly check for an NVIDIA or ATI GPU."