9800GT播放怎樣的h264會撥不動?

硬體是i5-2400 + 9800GT

平常使用MPC開啟dxva來看影片
就算撥一些1080p x264壓縮的電影都還順的
但最近偶爾會有些影片播放時(開啟dxva)會delay,cpu使用率約15%
關閉dxva用純軟解就不會了,當然cpu使用率就飆高到30-40%.
是那些影片太吃硬體嗎?
9800GT開啟硬解播放h264會撥不動?

比如以下這片:
General
ID : 1 (0x1)
Complete name : E:\GG-Special remix performance.MTS
Format : BDAV
Format/Info : Blu-ray Video
File size : 1.32 GiB
Duration : 7mn 16s
Overall bit rate : 26.0 Mbps
Maximum Overall bit rate : 28.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.2
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=3, N=30
Codec ID : 27
Duration : 7mn 16s
Bit rate mode : Variable
Bit rate : 24.7 Mbps
Maximum bit rate : 26.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.199
Stream size : 1.26 GiB (95%)

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 129
Duration : 7mn 16s
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -33ms
Stream size : 13.3 MiB (1%)

Text
ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Duration : 7mn 16s
Delay relative to video : -33ms