Noise level:3,5 Sone(C't) - 4,2 Sone(Golem)
Idle measured by German C't=5 Watt (AMD claim 3 watt)
average consuming measured (C't)=198 Watt (official TDP 250 watt)
Up to 30% faster than the GTX580
Ram Bandwidth 264 GByte/s
support for ECC RAM
Compute speed: DP: 0,95 TFlops / SP:3,79 TFlops
(Open source-friendly)Video Codec Engine/VCE
The only downside: google translate: "Unfortunately, OpenGL comes in four-run driver again AMD's weakness to light, which breaks a strong performance"
"Leider kommt im OpenGL-4-Durchlauf wieder AMDs Treiberschwäche ans Licht, die Performance bricht stark ein"C't(heise)
OpenGL on HD7970 is shit but all other stuff is good.
But on Linux we don't use DirectX except for Wine and Gallium3D. We're stuck with OpenGL which is slower on AMD cards.
Wine does not use DirectX natively, it implements the same APIs using OpenGL so effectively they're the same. I heard there was a DirectX state tracker for Gallium3D but I've never heard of anyone using it, I don't think it's usable for anything yet (and IMO probably never will be).
YES! the HD7970 beats the gtx580 and gtx590 in ARMA2-OA
min fps: 66fps HD7970 vs 50 fps GTX580
the HD7970 is 32% faster!
Raw performance is not really that impressive, the gtx590 beats it in most other tests, and AMD's own HD6990 is faster in almost every test, what is really impressive is the power usage, especially when idle.
Lets hope this low power usage will allow AMD to later release a HD7990 that will also impress with it's raw power alone.