Since launch, I've been running a single GTX 680 card to run my 3 Acer LCD's in surround mode (2 off DVI, and the third off a DVI to display port adapter). Additionally, I've been using the peripheral display feature, running HDMI out to my Yamaha RX-V3800. Doing so creates a secondary display output that I don't use for anything other than audio (although I have temporarily connected a tv to the receiver for troubleshooting). This configuration worked great, and passed through 7.1 PCM and supported bitstreaming as well.
I just got my second GTX 680 and have found that enabling SLI disables the audio output over the HDMI port. You can still configure it like normal, but no sound is produced. The receiver indicates that it recognizes an HDMI signal, but only a stereo signal regardless of configuration.
I have tried every combination of ports I can think of (swapping between the HDMI ports on the two cards, as well as moving the third DVI connection between the primary and secondary card). It will work if I disable SLI, but have all displays enabled, but I get nothing if SLI is enabled.
To isolate other software issues, I've just performed a fresh Installation of Windows 7 Ultimate x64, and I have tested with both official driver releases for TX680's (301.10 and 301.42) Anyone have any thoughts or solutions?
I just got my second GTX 680 and have found that enabling SLI disables the audio output over the HDMI port. You can still configure it like normal, but no sound is produced. The receiver indicates that it recognizes an HDMI signal, but only a stereo signal regardless of configuration.
I have tried every combination of ports I can think of (swapping between the HDMI ports on the two cards, as well as moving the third DVI connection between the primary and secondary card). It will work if I disable SLI, but have all displays enabled, but I get nothing if SLI is enabled.
To isolate other software issues, I've just performed a fresh Installation of Windows 7 Ultimate x64, and I have tested with both official driver releases for TX680's (301.10 and 301.42) Anyone have any thoughts or solutions?