We'll begin our analysis with a couple of synthetic benchmarks, starting with 3DMark Firestrike:

We don't believe that the newest iteration of 3DMark is an ideal measure for comparing GPU architectures, but it does give us a useful glimpse into the Radeon product stack. Despite the slightly lower core clock and memory bandwidth compared to the Radeon R9 280, we see the Radeon R9 285 perform faster than its predecessor and land right between the Radeon R9 280 and 280X. Indeed, the improvements that AMD has made to the Tonga GPU have a substantial impact here.
Now let's see if Tonga's strengths will manifest in a GPGPU processing scenario. We took Sandra 2014 SP3's GPGPU cryptography benchmark for a spin:

The Radeon R9 285's lossless color compression can't help it here, and the new card's performance reflects its slightly lower core clock rate when it comes to GPGPU processing. Having said that, performance per watt have increased as we'll see in the power test results later on. Now let's move on to the game performance benchmarks.
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- The Radeon's GCN Is Updated Again: The Tonga GPU
- Asus Strix Radeon R9 285
- Gigabyte R9 285 WindForce OC
- Test Setup and Benchmark Suite
- Synthetic Benchmark Results
- Titanfall and Battlefield 4 Results
- Thief and Arma 3 Results
- Grid Autosport and Assassin's Creed IV Results
- Watch Dogs and Far Cry 3 Results
- Idle Power Consumption Results
- Gaming Power Consumption Results
- GPGPU Power Consumption Results
- Temperature and Noise Results
- Radeon R9 285 Holds its Own at £170
I have a G3258@4.5ghz and a GTX660 and I get better fps than they show there.
I have a G3258@4.5ghz and a GTX660 and I get better fps than they show there.
potato
I have a G3258@4.5ghz and a GTX660 and I get better fps than they show there.
potato
a potato.............really?................the fps should be heaps better than that.