De momento con el firmware que hay para el A400 no le sacas/exprimes todo el potencial que tiene el chip. Si no vais a reprocducir por red id de cabeza a por el A 400, cuidadito con la red y la carga del buffer.
Por cierto ya con el A200 proyecto en 106 ´´ y no lo veo nada mal. Te dejo un poco de informacion sobre los chips sigma .

"In response to the challenge from Realtek and in recognition of the aging nature of the 863x, Sigma released two new chipsets in late 2009, the 864x series and 865x series. The Sigma 864x and the 865x are related and similar chips, with the 864x being the more powerful. The 865x is clocked at 500Mhz and the 864x at 667Mhz. These two Sigma chipsets would last well into 2012 with many variations.

Sigma 864x Media Players
The Sigma 8643 and 8642 are identical except that the 8642 is a Macrovision version allowing for the ability to play copy protected DVD / Blu-Ray. The 864x chipset is significantly more powerful than the 865x series, despite the product number being lower. The 864x chipset offered full 7.1 HD-audio downmix and passthrough.

The 864x tended to be used by the established and most popular manufacturers. Key players included the Popcorn Hour C-200 and HDI Dune Base 3.

Sigma 865x Media Players
There were initially 8655 (64bit RAM - 6 video DACS), 8653 (32bit RAM - 4 video DACS), 8654 (Macrovision enabled version of 8655), and 8652 (Macrovision version of 8653) versions of the 865x. All 865x chipsets perform the same in terms of video format support and performance. In theory the 865x offers full 7.1 HD-audio support but in reality licencing problems means that DTS-HD MA passthrough is missing in many players (e.g. WDTV Live 2011). In 2011 there was also released a version with Android 2.2 support (similar to the Realtek 1186), this version did not gain much support from manufacturers and only appeared in a couple of players. "

Sobre 8910 lleva una unidad de procesado VXP .

Salucos