However to be fair to AMD, they have at least made some effort to improve on the 6700 series over the 5700 series through the BIOS. As you may recall, one of the big differences for the 6000 series over the 5000 series is that the 6000 series got HDMI 1.4a support, along with a UVD3 video decoder that was capable of decoding the additional resolutions and bitrates Blu-Ray 3D’s MVC(H.264) profiles require. These changes have been backported to Juniper to some extent.
UVD2.2 is fast enough to process MVC, so now the 6700 series can decode Blu-Ray 3D. Without any hardware on hand we can’t specifically test this, but we suspect AMD may have introduced a new PowerPlay state (or edited an existing one) to further ramp up Juniper’s core clocks when playing MVC content, as this would be the most practical way to increase the max bitrate UVD2.2 can handle, if indeed it couldn’t handle MVC bitrates at the usual core clocks. Update: AMD has confirmed our theory. In fact the UVD3 also have a Blu-Ray 3D PowerPlay state, which means UVD2 and UVD3 may be more similiar than we once thought.
Meanwhile HDMI 1.3 and HDMI 1.4a both have the same bandwidth requirements, so now the 6700 series is HDMI 1.4a capable through some BIOS magic – although we haven’t been able to get confirmation that this support extends beyond support for the frame-packed formats required for HDMI 3D, or in other words it may not support 2K x 4K resolutions and other features normally associated with HDMI 1.4a. Update: AMD confirmed that the 6700 series only supports the HDMI 3D portions of the HDMI 1.4a spec. Apparently this is consistent with Northern Islands, which [sic] doesn't support 2K x 4K resolutions over HDMI either.