SiS 645: Pentium 4 DDR - Take II

Video Encoding Performance

In order to test video encoding we used Flask coupled with the latest official release of the DivX codec (v4.01, from www.divx.com) and encoded a 120MB MPEG-1 video. The encoding resolution was 352 x 288, the Fast SSE2 iDCT codec was chosen, deinterlacing was enabled as was the highest quality filtering, and we did not decode audio. The end result is the following performance graph measured in frames per second:

MPEG-4 Video Encoding Flask MPEG 352 x 288 SiS 645 (DDR333) Intel 850 (PC800) SiS 645 (DDR266) VIA P4X266 (DDR266) 40 39.2 39 38.8 | 0 | 8 | 16 | 24 | 32 | 40 | 48

Again, we aren't seeing a large performance difference between the contenders. The 645 with DDR SDRAM does come out on top once again, but barely holds any sort of lead over the competition.

MPEG-2 Video Encoding Video 2000 SiS 645 (DDR333) Intel 850 (PC800) SiS 645 (DDR266) VIA P4X266 (DDR266) 45.9 45.9 44.9 44.1 | 0 | 9 | 18 | 28 | 37 | 46 | 55

...and the same holds true for MPEG-2 video encoding.