Not that I know of, but maybe the real question might be what CPU are you using that is having problems decoding SD???
It's older AMD Athlon 64 3700+ (single core, socket 939)
however it plays all kinds of video from SD to HD in a multitude of formats (flash, html5, divx, h.264, x264, qt/mov, avi, DVD's (ripped or from DVD drive), etc.
I also dual boot MacOSX 10.6.7 (snow leopard) thanks to the help from some of the hackintosh boards out there. However I primarilly work and play in Windows 7 32-bit.
I'd love to upgrade but one thing leads to another. New CPU, new socket so new motherboard. New MB ok now new ram (DDR-400 is outdated now). I could probably use the same power supply as it was recently replaced a year ago with a nice Corsair one. DVD drives are IDE and I see that's being phased out. Sound card is PCI not PCIe. Oh well it works for what I use it for (net, paying bills and quicken).
Hey I have a win7 codec pack installed which includes stuff like ffdshow and all kinds of settings. Maybe that interferes?
My DirecTV HD WISHLIST: Nicktoons, FXM, Oxygen, Discovery Family, Discovery Life, GSN, Sprout, GAC, Esquire, El Rey, Up, Music Choice Play HD, NASA, Epix (if reasonably priced)
My DirecTV SD WISHLIST: MTV Hits, MTV Jams, Music Choice, Youtoo TV