Now I bought an MCE TV card with the Phillips 7135 chipset. I finally got it configured with Vista MCE. (got the card yesterday). MCE recognizes it but the TV is extremely choppy. The video and audio are terrible. In TV Expert it's fine.

I increased the virtual RAM to 4GB and disabled unnecessary

How can I speed it up? 


Computer Properties:
AMD Athlon XP 1600+ 1.4 GHz Processor
1.50 GB or 2GB RAM (XP says 1.5GB and Vista says 2GB, BIOS says 1.5GB)
ATI Radeon 9500 Pro 128MB
Windows Vista Home Premium SP1
Computer: Cyberpower

CPU and GPU are weak. Time for an upgrade.

The CPU is at the highest the motherboard supports. I just bought a new graphics card (the one i listed)

Sorry but that TV tuner is a software based encoder which means that the CPU must perform the encoding rather than the tuner.  There are other TV tuners that include hardware encoders.  Your CPU will likely not be sufficient for this to run smoothly.

Your video card is probably sufficient however.