Thraktor said:Judging by current rumours, it's likely to be somewhere between 3 and 4 (probably closer to 4).
Here's a quick spec comparison of the Radeon 4850 GPU with the XBox 360's Xenos GPU:
This should only serve as a very rough guide to relative power, as, even if the Cafe GPU is based on the 4850, it could have any number of changes compared to the PC GPU, such as a smaller fabrication process, a higher clock speed, or added features like the Xenos's 10Mb of eDRAM.
Regarding the CPU, you have to take into account that, if the Cafe is backwards compatible with the Wii (which is very likely, especially as they're sticking with an IBM PowerPC processor and an ATI GPU), then the CPU is almost certainly an out-of-order processor. This would mean that, even with the same clock speed and number of cores, it would be significantly faster than the XBox 360 CPU for many applications. It wouldn't make much of a difference for heavily linear code like physics simulation, but would be a huge improvement when it comes to AI, and many aspects of game logic. If there's a modest speedbump over the XBox 360 CPU, a larger cache, and an improved architecture (probably a stripped-down POWER7), then we'd be looking at a much more powerful processor overall.
RAM is hard to judge. There'll be at least twice as much RAM as the XBox 360, perhaps more, and probably quite fast. Not much more we can say at this stage, really.
It's also worth considering that, the last time Nintendo actually tried to produce a powerful console (the Gamecube), they did an incredibly good job of designing it, producing a machine that was significantly cheaper to make than the XBox, but was still powerful enough for games like Rogue Leader (and easy enough to program for that Rogue Leader was there near launch). It's very unlikely that they'll do anything stupid when designing Cafe, like a significant mismatch in capability between the CPU/GPU/RAM.
Furthermore, people shouldn't be expecting every game to run at 1080p. Even if the console's capable of it (very likely), most devs will stick with 720p for the simple reason that the considerable majority of TVs are 720p. Might as well squeeze as much as possible out of the console at 720p, rather than have to trade off a lower framerate/fewer effects/etc. to render at a resolution that most TVs don't support.
Personally, I'm most interested in those 160 VFPUs. Nintendo made arguably the best cel-shaded visuals ever (Wind Waker), but the Gamecube and Wii were fairly gimped in terms of shader capabilities, so I'd love to see what they can do with a far more capable GPU. (I'd give any amount of money for a 3D Yoshi's Island sequel with crayon-drawing style graphics made by the Mario Galaxy team)
What about cost?