Playstation 4 musings
So Sony has decided to partner with AMD to provide the processing power in the next Playstation console. They are sticking in a single chip eight x86-64 AMD "Jaguar" cores and a AMD next-generation Radeon™ based 1.84 TFLOPS graphics engine backed by 8GB of GDDR5 RAM. The single chip "APU" will likely also include a dedicated video encoding & decoding processors.
My first question is whether 8GB of RAM will be enough (although that's a leap from the 512MB of the PS3 & XBox360) - and whether there will be bottlenecks trying to feed 8 cores and a modern GPU through the unified connection.
My second question is whether the size of the APU would drive down yeilds (and thus increase costs). Then again, it might be multiple chips in a single package. The AMD Jaguar is also the "next generation", so there may be problems there is well.
And finally I'm wondering why x86 at all. One of the problems with x86 is the decoder complexity to handle the decades of cruft inherited from the x86 line. AMD might have been able to remove some of this since the PS4 doesn't need to be backwards compatible, but there's still a drag on the overall design. However, Sony might have determined that pressures from the PC world have advanced x86 beyond what Power & ARM are currently capable of.
I'm also bemused by the comment "no PS3 compatibility at launch" as if PS3 emulation is a realistic possibility. While the plan may be to provide On-Live style streaming of PS3 games, I'm not certain whether latency issues will ever be overcome enough to make this viable.
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