我在雜誌中發現有報導有關問題, 先在Anandtech開了一篇.
http://forums.anandtech.com/message...2&enterthread=y
之前三篇全被封鎖了...
The article can be found on Maximum PC January 2005, P.26~27 Watch Dog
I will type the following article verbatim, and no, I didn't write to the magazine.
So kudos to the man who did.
[Is My 6800 Only Good For Gaming?
Dear Dog: There seems to be quite a bit of noise on various message boards claiming that the video features on the nVidia 6800 GPUs don't work. To quote nVidia's website: "Another important factor is is that the GeForce 6 series GPU are completely programmable and can handle formats such as WMV9 and MPEG-4. The nVidia motion compensation engine can provide decompression acceleration for a variety of video formats including WMV9, MPEG-4, H.264, and DivX. As with motion compensation with MPEG-2, the nVidia video engine can perform most of the computation intensive work, leaving the easiest work for the CPU."
This testimony was a major factor in my decision to buy a 6800-series card. But now everyone is saying the card cannot do what the company said it could. Am I, along with many others, stuck with just a great gaming card? If anyone can get to the bottom of this, it must be you. Thank you in advance.
--Jonathan Hayton
The Dog Responds: The Dog contacted an nVidia spokesman who cleared up the confusion over this issue. He said the 6800 does indeed include the advanced video support that's touted on the web site, but consumers must download a newer set of drivers that was made available at the end of November.
According to the spokesman: "nVidia is also working with application vendors to take advantage of the programmable encode features of of the GeForce 6800 and 6600. Just like programmable pixel shaders when they were first introduced, this requires additional collaboration with application vendors. The first application to support its GPU encode capabilities is Windows Media Center Edition 2005."
"You only need nVidia's decoder if you want the advanced post-processing features (i.e. motion adaptive de-interlacing and inverse 3:2 pulldown), in addition to hardware MPEG-2 decode."
"For MPEG-2 decode only, any application built on DirectShow can take advantage of the hardware decode in the 6800 and 6600 as long as they access the hardware through DirectX Video Acceleration. WinDVD, for example, can take advantage of nVidia's hardware decode."
There is one difference on between the 6800 and the newer 6600 core, though; and that's how the two cards handle Windows Media Video 9 hardware acceleration. nVidia says the 6600 does more offloading when playing WMV9 content than the 6800 is capable of, but the 6800 does do some acceleration. ]