Re: Could a PPU really change the effect of Next generation.
Josh378 said:
Lets say that Microsoft puts in a tri-core CPU AND a PPU with a rumored R500. We could be looking at a VERY powerful console next gen.
Lets backtrack a little. Without the PPU we are still looking at a powerful home console. Look, 3 PPC cores with altered "Velocity" type vector units would put out ~80-100GFLOPs. 3 general processing cores
plus a ton of floating point power to boot. Then you have a cutting edge feature set R500 (possibly with eDRAM)--all on a balance closed box that games are designed for.
A very top end PC does 20-30GFLOPs. And even when R600 comes out
next year it will be a long time before games make use of the power/feature set as the *bare minimum* standard. Same with the CPUs. We wont be seeing games that require and/or make such a great use of the extra core in dual core PCs until 2007 by my guestimates.
Yes, it would be "nice" to have a PPU, but having one is not the difference between a "VERY powerful console" and a "very powerful console". Cutting edge gaming software is barely taking advantage of the CPU/GPU power in top end PCs right now. X2 will be more powerful than a top end PC at launch. Same goes with the PS3 and probably Rev in 2006.
All a PPU would really do is let the processors work more on AI and general game logic and allow the vector units to do geometry. Yes, that would be great, but not necessary. A lot of this depends on how far the PPU is along in development, how much memory the chip would need in a closed system, how much power it takes (current 25W), and the manufacturing costs (I believe they are at 125M transistors and are currently working on 130mm process). If MS can get good physics performance out of the vector units and they do not want to spend more money/deal with more heat and power issues a PPU would be dead in its tracks. Basically: Lets not hold our breath