The PVR-500 card contains dual tuners and that makes it longer than a 1/2 PCI card length. It ends up being just a little more than 1 cm longer than the PCI card cage used in the Dell.

I pulled the cage of the riser card and tried the PVR-500 in the Dell with the case closed. If you squint you can see that the card just fits. It’s a tight squeeze. The power connector for the hard drive is just touching the edge of the card:

To get the card to fit, I had to remove a chunk of the metal card cage.

Card cage before:

Card cage after:

And with the PVR-500 installed: