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1. Floating point is done by the 2700g not the PXA270. So you are correct but you forgot the gpu detail ;)
2. The second Media Chip is to be compared to the 2700g, not the CPU. You are refering how the CPU get's it's data, and compare it to how the so called Media Chip ( a GPU in reality ) handle's data.
3. The PSP has 2 R4000 Microporcessor's. One act's as a CPU, while the other one as a Media Chip. It doesent have 2 R4000 & 2 Graphics's accelerator's ... no no ... Compare one as a cpu, and the other one as a gpu. Same idear.
True, the PSP has 2.6 GB/sec embedded DRAM ( 2MB ). But this is where the shoe doesent fit. It still need's to get it's data from the main memory ( the 32 mb shared memory ). So, even if it's able to do 2.6GB/Sec internally, it still need's to grab data externaly. You pointed out that it's able to have 1.8GB of data on the card ... now that mean's it still need's to grab a lot of data all the time. A system is only as fast as it's slowest part.
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