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Hello,
I currently have an AMD 5850. It's the first time I've used a non-nvidia card since my Voodoo 3. I regret jumping ship :/
My setup requires I output HDMI audio and Full RGB or YCC 4:4:4 video to my receiver and then pass it along to my 4:4:4 display. With my 5850, I can only output subsampled chroma (RGB Limited or YCC 4:2:2) from the HDMI port of my video card while simultaneously outputting HDMI audio. The only way I can get 4:4:4 chroma out of my 5850's HDMI port is to hack my display or receiver's EDID with an override file and disable HDMI audio. Behavior is the same if I go through my receiver or straight to my display. Using the DVI port with a DVI to HDMI cable to my receiver or straight to my display works fine, but then I'm missing out on 8-channel PCM and bitstreaming, defeating the point of my receiver and surround setup. I'm not willing to return to SPDIF.
TL;DR: Basically, I'm looking for confirmed reports of users getting 4:4:4 chroma (either YCC 4:4:4 or RGB Full) from their GTX 460 (or 570/80) via the HDMI port while simultaneously sending audio along HDMI.
After reading a single report from someone who says he suffers the same problem I suffer on my 5850 on his 460 GTX, I'm worried this is an inherent HDMI limitation. However, if so, it's undocumented.
If you're unsure and you have an HDMI to HDMI connection on your 460/570/580 and send the video/audio signal to an HDMI audio-enabled device (be it a TV or an AVR of spec 1.3 or beyond), please confirm you're getting proper 4:4:4 chroma sampling by taking a photo of the test image here:
http://img408.imageshack.us/img408/6545/444scrolleasy.gif
See if you get straight red pixels, or a multi-colored mess from your close-up photo of the section to the left of the "20". For comparison, here are my photos. The first is proper 4:4:4 taken of my 5850 outputting to my display (or through my AVR, makes no difference) via a DVI to HDMI cable.
The second photo is subsampled 4:2:2, my only option when outputting straight HDMI to HDMI with audio, either to my receiver or to my display:
Thanks so much to anyone who can give me a definitive answer as to if the 460 will output proper 4:4:4 chroma whilst passing audio. The HTPC crowd largely doesn't care about this, because they mostly watch Bluray discs on their PC. I'm a gamer and regular desktop user, so subsampled chroma is blindingly obvious to me. I also don't want to fall back on SPDIF for audio as ATI users in my position must do. I'm ready to make the jump back to Nvidia, but need a little proof first. Thanks for reading.
Edit: Please note a lot of TVs subsample all chroma to 4:2:2. Make sure yours supports 4:4:4 before trying the test!
I currently have an AMD 5850. It's the first time I've used a non-nvidia card since my Voodoo 3. I regret jumping ship :/
My setup requires I output HDMI audio and Full RGB or YCC 4:4:4 video to my receiver and then pass it along to my 4:4:4 display. With my 5850, I can only output subsampled chroma (RGB Limited or YCC 4:2:2) from the HDMI port of my video card while simultaneously outputting HDMI audio. The only way I can get 4:4:4 chroma out of my 5850's HDMI port is to hack my display or receiver's EDID with an override file and disable HDMI audio. Behavior is the same if I go through my receiver or straight to my display. Using the DVI port with a DVI to HDMI cable to my receiver or straight to my display works fine, but then I'm missing out on 8-channel PCM and bitstreaming, defeating the point of my receiver and surround setup. I'm not willing to return to SPDIF.
TL;DR: Basically, I'm looking for confirmed reports of users getting 4:4:4 chroma (either YCC 4:4:4 or RGB Full) from their GTX 460 (or 570/80) via the HDMI port while simultaneously sending audio along HDMI.
After reading a single report from someone who says he suffers the same problem I suffer on my 5850 on his 460 GTX, I'm worried this is an inherent HDMI limitation. However, if so, it's undocumented.
If you're unsure and you have an HDMI to HDMI connection on your 460/570/580 and send the video/audio signal to an HDMI audio-enabled device (be it a TV or an AVR of spec 1.3 or beyond), please confirm you're getting proper 4:4:4 chroma sampling by taking a photo of the test image here:
http://img408.imageshack.us/img408/6545/444scrolleasy.gif
See if you get straight red pixels, or a multi-colored mess from your close-up photo of the section to the left of the "20". For comparison, here are my photos. The first is proper 4:4:4 taken of my 5850 outputting to my display (or through my AVR, makes no difference) via a DVI to HDMI cable.
The second photo is subsampled 4:2:2, my only option when outputting straight HDMI to HDMI with audio, either to my receiver or to my display:
Thanks so much to anyone who can give me a definitive answer as to if the 460 will output proper 4:4:4 chroma whilst passing audio. The HTPC crowd largely doesn't care about this, because they mostly watch Bluray discs on their PC. I'm a gamer and regular desktop user, so subsampled chroma is blindingly obvious to me. I also don't want to fall back on SPDIF for audio as ATI users in my position must do. I'm ready to make the jump back to Nvidia, but need a little proof first. Thanks for reading.
Edit: Please note a lot of TVs subsample all chroma to 4:2:2. Make sure yours supports 4:4:4 before trying the test!
I PM'd nuker earlier today to see if his EDID hack works when passing HDMI audio along with the video signal, or if he's only tested it with an HDMI to HDMI pure video connection (essentially DVI mode). There's a similar EDID hack to correctly pass HDMI video 4:4:4 from ATI cards, as well, but at the cost of disabling HDMI audio output. This hack is done by changing extension blocks in the EDID override .inf from 1 to 0.