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Old 29th November, 2009, 09:27 AM
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Gizmo Gizmo is offline
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The 2M Matrox Millenium was not optimized for video playback; it was a 2D accelerated card and was designed for those kinds of workloads; office documents, limited CAD/CAM of the time, that sort of thing. As I recall, it wasn't even a particularly good gaming card.

In any case, unless I am mistaken, that card sits on the PCI bus, not the AGP bus, so you've got three problems:
  1. Limited on-board video memory. This means that there's not much room for the CPU to get ahead of the card and stuff information into video RAM for playback.
  2. Limited processing capability on the card: pretty much the entire workload of video playback has to be done by the CPU; all of the video decoding, reading the data stream, and shoveling the decoded data to the card's display memory.
  3. Programmed I/O over the PCI bus; the card is really doing very little processing, and as I understand things, it is actually faster for the CPU to write the decoded data across the bus to the card than it is for the CPU to put the data into RAM, set up the DMA transfer registers, and let the DMA engine transfer the data across the bus.

That mobo should be able to handle a 4X AGP card, but you'll need to find a card that is 4X AGP compatible. While most video cards should be able to run either 4X or 8X AGP, you'll need to make sure of that.

Either of these should do:
Newegg.com - XFX PVT44AWANG GeForce 6200 256MB 64-bit GDDR2 AGP 8X Video Card - Desktop Graphics / Video Cards
Newegg.com - HIS H925H128E1TOAN Radeon 9250 128MB 64-bit DDR AGP 4X/8X Video Card - Desktop Graphics / Video Cards

Obviously, there are other cards that will work as well; these were just two that came up quickly.

As for power requirements, yes, that could be an issue: these cards will likely draw a fair bit more than your Matrox does. However, they draw the majority of their power when running 3D rendering tasks. Even then, neither of the cards mentioned above has an extra power connector; they get all their power from the AGP slot, which means they can't be all THAT power hungry. As long as your PSU can handle about 300W, I would think you should be in good shape.
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