I got the non-tuner version two days ago. I haven’t had a chance to use it with s-video yet, and I’ve only used it with Final Fantasy II on the Playstation 2, which probably isn’t the greatest test for multiple reasons (older game, lag wouldn’t be as obvious), but here’s my thoughts so far:
When I first installed it and started up the included software, I’d get a blue screen of death every time. Turns out it doesn’t like my old USB HP CD-RW drive. Unplugging that makes it work.
The included software is super easy to use. No settings to mess with besides selecting “composite” or “s-video” as the input source.
There SEEMS to be little or no lag (audio or video), but as mentioned it’s hard to tell with the only game I’ve tried so far. It seems like the video jumps slightly when I’m running in castles. The video quality in general is… “eh”. Again, not a great game to test this on, but I know it looks worse than the same game running on the Gameboy Advance would (although also it’s not really fair unless I backed up so I’m further away from the screen).
I’ve tried d-scaler, but I have no idea what all the settings do, and nothing I tried improved the image any, some settings just introduced a ton of lag without fixing anything. So I went back to the included software.
I don’t know…so far I’d recommend it for the price. I’ll post back once I’ve used it with s-video and more games.
Regarding CPU power, in windowed mode, it seems to take less than 20% power on my Pentium 4 2.4Ghz/533Mhz which has 512MB (around 11% normally?). I moved it over to another system with a Pentium D 2.8GHz/800MHz with 1GB, and it seemed like it stuttered slightly less when running in castles? Hard to say-but at any rate, CPU power won’t be an issue for most people. The second computer is connected through VGA rather than DVI, and I almost think VGA gives a slightly nicer image, just because it hides the flaws slightly better than DVI.