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Help troubleshooting slow video on 2 diff computers

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by jmachan

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Hello,
I know there are a million posts about slow video out there (I've spent months pouring through them).

I've got 2 computers:
1) Athlon XP 2100 (thoroughbred), 1 GB DDR (dual mode), nForce2 chipset, Radeon 9600 video AGPx8 (no AVIVO), XP Pro
2) Xeon 2.8 GHz socket 604 in an old IBM server (x235 71x), 2.8 Gb PC2100, Radeon X1550 PCI (has AVIVO). Vista Ultimate

Neither one of these can play anything over 480 lines of resolution without crazy choppiness or out of sync. Internet TV through media center on #2 sucks.

Both OSs are up to date as well as drivers

ATI was telling me it was a PCI bus bandwidth issue on #2, but #1 has the same problem using AGPx8...almost identical.

Both run with 100% CPU when said problem occurs. I've played with PCI latencies, codecs, drivers, OS settings, BIOS settings, hardware configurations (i.e. no other cards), DVD software...am I just dealing with hardware limitations in boh? (i.e. should I just live with it?)

Thank anyone in advance for any feedback/ideas.

3 replies

by robo_dev

On a Dell PC of mine, jumpy video was fixed with the WinXP CPU driver (see amd.com or your mobo maker website). It's a weird

Of course that does not explain the Xeon!

What kind of LAN throughput are you getting on the Vista box? Out of the box, Vista gave me a whopping 100kbs of throughput. If your lan speed sucks, then video won't work. There are several things in vista to turn off: global auto tuning and remote differntial compression.

For either machines, look for things in bios like thermal CPU monitoring or other monitor processes...and disable them. For video you need every clock cycle.

by jmachan

Thanks a lot for taking the time to reply. I appreciate your efforts. Unfortunately, it looks like my CPU won't take the PowerNow! driver (assuming I found the right thing).

I'm getting pretty good network and internet speeds...plus it does the same thing when file's on the hard drive...

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