I've built 16 different systems in the past 6 months and by far the most solid performers are the Tyan Thunder K7 boards. Of course, it depends on if overclocking is a priority.
I bought the GA-7DPXDW-P from Gigabyte. I have 2 Athlon 2800+ MP cpus mounted and running. It has been stable since I built it 3 months ago. Getting the Promise RAID (onboard) array setup was a little tricky, but the motherboard came with an instruction book for the Promise RAID Function. The RAID array wouldn't "stripe" at first, until I deleted the array and re-created it a second time, so far so good on that. I boot to an IDE drive (80G) and capture video to the Stripe set (2 @ 120G drives).
With a standard PCI card (Osprey 220) I can capture 59 FPS (Frames Per Second) without dropping frames.
The Osprey 220 has a problem handling interrupts (audio won't work) with the AMD 768 Chipset, and the solution was to upgrade to a PCI-X version (the Osprey 240 card). The problem is really not the Chipset per se, just with the way the Osprey handled the interrupt routine. The Osprey 240 card uses the exact same drivers, so it was an easy plug and go upgrade.
I cannot say enough wonderful things about the folks at viewcast and the Osprey products. They worked through the AMD / 768 / 2800+ / PCI issues with me and were very interested in customer satisfaction. They were the ones who diagnosed the true problem (I was dropping Audio and Video whenever I elected to try to capture Osprey Audio along with Osprey Video using just the 220 card) and then they SENT ME THE UPGRADED PCI-X card in order to fix my problem!
My system just has one Gig of Ram, but so far that has been ok for my application.
I am not doing 3d, but rendering the video stream into multiple speed "streaming" files REALLY TAKES A LOT of CPU. If I ask for too many streams to be rendered, I can max out the cpu fairly quickly....so I have taken to authoring my broadband streaming files in separate "working sessions" (In the am I do broadband stream authoring, and in the pm I do the dial-up modem streams).
I have a couple of DVD writers SONY DRU-510A (for converting my company's vhs tapes into dvd media, (using My-DVD software that came with the drives) but I haven't yet got around to this part of my project yet.
I use an ASUS V7100 PRO 64 video card, and it has been a good fit for this application.
The Monitor is the Sony 171 MP AND IT IS AWSOME for video monitoring and playback.
The memory is (two) Kingston KVR266X72RC/512 (512mb) 266Mhz DDR PC2100 Reg ECC DIMM CL2.5 and has been very stable.
All in All, I am very pleased with this video authoring platform for publishing traditional video products into Internet multimedia streaming presentations (each video also has accompanying powerpoint slides rendered into jpgs)
If you have questions or would like to know more drop me a mail @ firstname.lastname@example.org (P.S. greatacts.com is not the site where the streaming media is, it is pay per view content so I can only show it by appointment unless you want to use your credit card to view dental industry videos (not likely, I think) dr