AVS Special Member
Join Date: Jan 2007
Location: Toronto, ON Canada
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I checked the manual for your board and unfortunately there is no digital audio header on it (just "HDAUDIO" for the front panel analog connections). So you can't get an optical out bracket, which sucks.
Also, as above you can't use the PCI audio card from Amazon you linked to because you only have PCIe slots. You can get PCIe audio cards but you could also get something that plugs into USB, as a solution.
The TV may or may not pass audio but even if it does, typically all you will get is 2.0PCM and Dolby Digital (no DTS, also as mentioned above). You can give it a try, at least, if you don't need DTS.
If you're getting something new at Christmas I probably wouldn't fret it too much, just engage Pro-Logic on 2ch output from the PC and live with that until you get a new receiver.
Note that you do also have multi-analog input on that receiver. So, you could just use three Y-cables to get 5.1 out of the PC. This would enable you to get HD audio as well, making it the highest quality connection you could do at the moment. However note that analog outs from PCs are typically lower level than CE devices meaning you'll probably have to dial the volume up a bit on the receiver to get the output level you want. Also you may be affected by the -10dB LFE issue, if you have a subwoofer.