Born for HD: first review of G98-8400GS

PAGE 1: The Beginning of PureVideo HD
PAGE 2: PureVideo HD Gen2 still not perfect
PAGE 3: G98:PureVideo HD Gen 3
PAGE 4: Comparing the die
PAGE 5: Frequency of G98
PAGE 6: Test bed and remarks
PAGE 7: VC-1: 1080P, King Kong
PAGE 8: VC-1 1080P De javu
PAGE 9: H.264 1080P X-MAN3
PAGE 10: H.264 1080P The Prestige
PAGE 11: MPEG-2 1080P Pioneer DEMO2006
PAGE 12: HD video data summary
PAGE 13: 3DMark06
PAGE 14: Final thoughts


The Beginning of PureVideo HD

Dec 2004, NVIDIA officially announced PureVideo. It is a technology based on the integrated programmable video processing engine in GeForce 6/7. With this technology GeForce can decode high definition video using GPU.

In June 2006, NVIDIA upgrade PureVideo to PureVideo HD. It has all functions that PureVideo does, and has optimized for Blu-ray & HD DVD videos. PureVideo HD combines HD video decode hardware acceleration, post-processing and HDCP, providing good quality video playback.

The PureVideo HD Gen 1 only can let GPU handle Motion Compensation and Deblocking in H.264/VC-1 decoding. Bitstream Processing, Entropy Decode and Inverse Transform still left to CPU so it can only lower few CPU usage.

We know in among H.264, VC-1 and MPEG-2 this the three coding methods the H.264 is the most complicated one, its Entropy Coding is one of the most CPU intensive processing. In the chart below this paragraph, you will see how high it is takes. If playing video with a very high byte rate only using software decoding then today’s mainstream CPU can barely handle that.

In other words, PureVideo HD Gen 1 surely can accelerate decoding HD video but can not handle the most CPU intensive process: Entropy Decode and Inverse Transform. This two process leave to CPU and will raised its usage a lot. Some entry level computers even some mainstream computer can hardly play H.264 video smoothly.

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41 Responses to “Born for HD: first review of G98-8400GS”

  1. Guilit Says:

    D8M has released? H.264 Decoding CPU utilization rose Instead, the not ideal.

  2. jeff Says:

    @ Guilit
    that’s only a few percentage @ celeron 430 so that’s nothing to worry about.

  3. Expreview.com - Extra Hardware News Report! » Blog Archive » 9600GT to be the first product of Geforce 9 series Says:

    [...] GPU is a 65nm processing chip. We already seem this tech on G92/D8P and G98/D8M. G80 and G86 have been EOLed, and G84 will also be EOL when the valentine’s day [...]

  4. Expreview.com - Extra Hardware News Report! » Blog Archive » Zotac unveils G98-8400GS 256MB GDDR3 Says:

    [...] With the bandled different I/O metal backboard, users can change the video output slot posittion to fit their pc cases. Full review of G98-8400GS can be found here. [...]

  5. Zotac unveils G98-8400GS 256MB GDDR3 » GPUs Daily News Report Says:

    [...] With the bandled different I/O metal backboard, users can change the video output slot posittion to fit their pc cases. Full review of G98-8400GS can be found here. [...]

  6. Fred Yontz Says:

    In the sentence “With the bandled different I/O metal backboard…” the third word should be “bundled.”

    I’m sure it’s a artifact of translation, but I’d like to suggest using “CPU intensive” instead of “CPU sucking.” In the USA “sucking” has some rather vulgar connotations; i.e. when someone says something ‘sucks,’ they’re not offering polite criticism.

  7. Jeff Says:

    Thanks for your suggestion! you konw, i saw some other reviews write like that, so i followed..
    anyway, i am going to fix the words. Thanks Fred.

  8. psolord Says:

    Nvidia can take the purevideo HD and EAT IT! It is clear in these tests that the nv cards require 300% more processor cycles than ati’s humble 2400. So i wouldn’t be so sure that nv can attack ati in the video department. As for mpeg2 you must really be the king of jerks to encode anything in mpeg2HD.You need 3 times more bandwidth for the same quality. And yes atis hd capabilities kick in whatever player you use. At least with bsplayer and klite megacodec pack i run hd 1080p videos with an ati2400pro and an intel E2160@2700mhz with just 1% cpu.

  9. PCI-Ex card that has HDMI/DVI out and can handle 1080p video - TechEnclave Says:

    [...] Born for HD: first review of G98-8400GS – Expreview.com (1) this review should be all you need it’s a shootout between the G98 and G86 8400′s , and the Ati [...]

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