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Problem with audio over Radeon 4870 HDMI | AVS Forum
https://www.avsforum.com/threads/problem-with-audio-over-radeon-4870-hdmi.1066151/
I've ran an HDMI 1.3 cable from my PC with an ATI Radeon HD 4870 (OEM DVI to HDMI adapter) through my Sony STR-DG720 into my Epson PowerLite Home Cinema 1080. The video is coming through fine at 1080p, but the audio will only playback in stereo. I've selected the "Digital Output Device (HDMI)" on my PC's playback devices page.
ATI Radeon HD 4870 Specs | TechPowerUp GPU Database
https://www.techpowerup.com/gpu-specs/radeon-hd-4870.c219
The Radeon HD 4870 was a performance-segment graphics card by ATI, launched on June 25th, 2008. Built on the 55 nm process, and based on the RV770 graphics processor, in its RV770 XT variant, the card supports DirectX 10.1. Since Radeon HD 4870 does not support DirectX 11 or DirectX 12, it might not be able to run all the latest games. ...
HIS HD 4870 512MB (256bit) GDDR5 PCIe < Legacy …
http://www.hisdigital.com/un/product2-381.shtml
ATI Radeon™ HD 4870 System Requirements. ... HDMI Video and Audio. A system with an ATI Radeon TM HD 4800 Series graphics card can help enhance the HD entertainment experience by providing a seamless connection to an HDTV or home theater system. With built-in 7.1 surround sound audio (AC3 / DTS ), the new GPUs and graphics cards support ...
The Radeon HD 4850 & 4870: AMD Wins at $199 and $299
https://www.anandtech.com/show/2556
The Radeon HD 4870 and 4850 both use a 256-bit memory bus like the 3870 before it (as well as NVIDIA's competing GeForce 9800 GTX), but total memory bandwidth on the 4870 ends up being 115.2GB/s ...
ATI Radeon HD 4870 & HDMI/audio question - GPUs
https://forums.whirlpool.net.au/archive/1088515
Got myself an ATI Radeon HD 4870 yesterday, and just looking at getting it setup to run to my TV. The current method (used for the old video card) is with a DVI to Component cable. With this new card, it comes with a DVI to HDMI adapter.
PCI\VEN_1002&DEV_9440 - RV770 [Radeon HD 4870] | Device Hunt
https://devicehunt.com/view/type/pci/vendor/1002/device/9440
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