而且DVD視迅加速居然還得額外花錢買, 更糟的是只能配合WMP用.

Anandtech還把之前兩串有關討論也封鎖了更讓使用者心寒.
雖然表面上看起來是為了處理原討論串產生的筆戰問題, 但不少人都懷疑是不是有nVidia的PR壓力. :think: :rolleyes:

有沒有人試過用RivaTuner 2.0 打開VPU看看結果如何?? 在RivaTuner裡面有一個微調叫做VPU Enable 我是沒有6600/6800的顯示卡 所以沒辦法測試

這個選項在哪邊？
不是Enable VPU Recover嗎？

你安裝了最新的RivaTuner之後把他裝起來 並且執行他
由於是第一次執行 他會花幾分鐘時間解開它的登錄資料庫

完成之後 到它的第三個Tab "Power User"的地方
下面有一排的按鈕
找一個看起來像一之放大鏡放在資料夾上的那一個
然後按下去
上面的表單就會改變
去找一個叫做Nvidia Forceware xx.xx w2k System Advanced
按開之後下面會出現很多選項
找個叫做VPEEnable 在它這個選項上按右鍵 選擇黃色燈泡的那一個將它打開即可
假如出問題了話 造成系統不開機 那就進入VGA模式 按照剛剛的步驟 找到這個設定 並按右鍵
只是這次選的按鈕是一個看起來像垃圾桶的東西 這是把它移除

希望這個會動

sorry 之前打錯了 它是VPEEnable, 不是VPUEnable

開啟成功之後有什麼效果嗎??

應該至少DVD的CPU使用率會下降 假如PowerDVD因此可以使用VPE了話

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... :stupefy:

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. ]

這句實在非常奇怪....該說非常多破綻。
總之我覺得NVIDIA在PureVideo的spec裡面講的比較實際。

http://www.nvidia.com/page/purevideo_support.html
Decoding部分沒有辦法做，但是Colorspace Transform和Post-Processing可以，
所以畫質方面的改善應該是照樣會有的，只是offload效果會變差。

從這點來看，NV40的VPU有部份指令有毛病這點應該沒錯，
只是不是極為嚴重，而是限定WMV9的case。

順道，上面有人提到的VPE Enable，應該是GF4MX開始加入的那個VPE。