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Originally Posted by Commodore 64 I use a passivley cooled 6600GT, from Gigabyte I paid 166 for the AGP version, the PCIe version is now 155. Also note that the nV Silencer aftermaket HSF oare dead quiet and move a lot of air.
PCIe passive 6600GTs: http://www.newegg.com/Product/Produc...82E16814125175 http://www.mwave.com/mwave/viewspec....iteria=AA41200
Tech Geek: I wish I had a spare 6600GT that I could send you so you could test it with your hardware. I know I had stuttering with SageTV and MediaPortal with almost all Digital OTA stuff until I got one. The troubling thing is that the 9600pro and 9700pro, especially should have been able to meet the 10GB/sec criteria with no problem. I still can't figure out why I couldn't get the 9700pro to work. http://www.avsforum.com/avs-vb/showt...65#post7129165 This guy is having stuttering even with his 6600GT and a Fusion Lite card. Man what a crapshoot this can be! |
Ok, the first card you linked to on the Newegg site.... 128 bit but memory clock of 1120MHz. All I noticed was the 128 bit and core clock of 500MHz. Oops... my bad. But some specs are different on the 2nd link.
If a 9700PRO doesn't work I'd say it's a DDR clock speed issue. That has DDR 400 if what I found is right and it's peak bandwidth rather than overall bandwidth that is the issue. Which means that 256 bit and DDR 400 may not solve the problem. Then it's a RAM clock over 625MHz.
I'd say it's actually lower and Microsoft is playing it safe.
Some people have memtioned setting the PCI latency and all sorts of things in an attempt to get this to work. I'm sure that can have an effect but I don't think it's the real problem.
It's gotta be related to decoding and buffering somehow and the fault lies with Microsoft It's not the tuner, it's not the video card... it's Microsoft.
Rather than spend a dime rewriting their code they just bump the required specs and say upgrade.
If I were to guess I'd say that instead of sending data to the card at a constant rate and using buffering to keep data ready for the card they are bursting blocks of video to the card as they arrive and if the card is still busy from the last burst it dumps the next block. Why it bothers lo-res more than hi-res I'm not sure. Perhaps block size or receive buffer size have something to do with it. Lo-res may have larger block lengths (in frames) so more frames are dropped when the card is found to be busy. That would be much jerkier than hi-res that would drop a few frames here and there.