In the slide-deck that was released yesterday some benchmark numbers have been, well almost hidden. But they are there. I added them into two charts to check out.

Let me clearly state that the benchmarks have been performed by AMD so we cannot verify quality settings. The scores have been derived from the footnotes of the PDF:

Polaris 10 2.8x performance per watt:  Testing conducted by AMD Performance Labs as of May 10, 2016 on the AMD Radeon™ RX 470 (110w) and AMD Radeon™ R9 270X (180w),ona test systemcomprising i7 5960X @ 3.0 GHz 16GB memory, AMD Radeon Software driver 16.20 and Windows 10.. Using 3DMark Fire Strike preset 1080p the scores were 9090 and 5787 respectively. Using Ashes ofthe Singularity 1080P High, the scores were 46 fps and 28.1 fps respectively. Using Hitman 1080p High, the scores were 60 fpsand 27.6 fps respectively. Using Overwatch1080p Max settings, the scoreswere 121 fps and 76 fps respectively. Using Performance/Board power, the resulting average across the 4 different titles was a perf per watt of 2.8X vs the Radeon R9 270X. Test results are not average andmay vary. 

Good to see is that they used a test-setup that matches ours:

Testing conducted by AMD Performance Labs as of June 10, 2016 on the Radeon™ RX 480 8GB and R9 380 on a test system comprising Intel i7-5960X, 16GB DDR4-2666 RAM,  GigabyteX99-UD4, Radeon Software Crimson Edition 16.1.1, and  Win10 64-bit. Using the Steam VR Performance test, Radeon RX 480 scored 6.3 and Radeon R9 380 scored 3.6. Performance may vary based onuse of latest driver versions. Test results are not average and may vary.

BTW theres also mention of a mobile part called AMD Radeon RX 480M based on Polaris 11:

Testing conducted by AMD Performance Labs as of May 10, 2016 on 3DMark 11 and 3DMark Firestrikeusing a test system comprising of an i7-4600M, 8GB, AMD Radeon driver 16.20. AMD Radeon R9 M280X (14CUs) scored 5700 and 3500 with a board power of 82W. AMD Radeon RX 480M (16CUs) scored 7200 and 4070 with a board power of 35W. Using Performance/Board power, the resulting average across the 2 different titles was a perf per watt of 2.8X vs the Radeon R9 M280X .

The RX 470 would use roughly 110W, benchmarks used are 3DMarl FireStrike,  Ashes of the Singularity, Hitman and Overwatch. The card is only being compared to a 270X, however FireStrike is normalized and was placed into our regular chart:

Here you go, have a peek: