I don't think so; latency is going to be a problem. GDDR5: High Bandwidth, high latency. DDR3: Low Bandwidth, low latency. So essentially, main memory is going to be VERY slow when you aren't loading massive amounts of data. This will require significant efforts to handle to aviod things such as "texture pop in" and stuttering. That, and its shared data, so after the GPU and OS are done, figure about 4GB for apps. As for the other hardware, the CPU...is interesting. Figure about half the clockspeed, twice the IPC as Cell, so theoretical max performance isn't going to be significantly different on that end. That being said, having a more PC like architecture (no more needing to DMA!) should equate to some extra "real" performance. I don't see the CPU as that big an upgrade honestly. The GPU looks to be somewhere between the 7850 and 7970. Which is a significant boost over the modified 7800GTX inside the PS3.