I tested a wide range of games to see how the card coped with each game. FPS graphs below are from a small selection. Note that when EAX advanced options could be turned on, they were.
Note all 'Headphone' results on the graphs means that I set output on the card to be 2 channel in the drivers and in-game.
Unreal Tournament 3
An Unreal Engine 3 game as it is a fast, frantic and furious multi player mash-up experience. Using advanced DirectX 9.0c features, the Unreal Engine looks fantastic and has a lot of explosions all around to give that feeling of depth. PhysX was not enabled in-game.
Settings: 1920 x 1200, Very high settings. The UT3 Benchmark was used for all cards.
Kicking around with some of the other Asus cards, the performance is middle of the road here.
Again around the speed of the STX, the Asus HDAV 1.3 Slim doesn't vary much from the median here.
Quake 4 is a game built on the Doom 3 engine. This uses many DX 9.0c features based on OpenGL game. Once again I did three benchmark runs on Quake 4 on each card and took the average of all my readings from these. The Quake4Bench demo was used to benchmark all cards.
Settings were: 1920 x 1200, Ultra settings. 16 x AF, 4 x AA. Multi-CPU enabled.
Not wishing to disturb the pattern, the HDAV 1.3 slim happily sits neither top nor bottom of our results.
And again the card gets a middle of the road result.
The gaming sound on the HDAV slim was decent enough and I didn't come accross anything difficult in particular whilst testing a variety of games. The FPS results show that the card doesn't degrade gaming performance particularly so there's not much to worry about here.
Having said that, the HDAV 1.3 Slim doesn't do the superb job that X-Fi based cards do, so if you're looking for a gaming card then I'd look that way, rather than at the HDAV 1.3 Slim.