The PPC 970 has a 512 KB Level 2 (L2) cache and uses a system bus running at half of the CPU’s core speed in the Power Mac G5. No, I doubt IBM will go dual core until 65nm (for PowerPC Gx). IBM announced the PowerPC 970 in October 2003, and it was used in the first Power Mac G5 models (1.6 and 1.8 GHz single-processor and 2.0 GHz dual-processor), which were introduced in June 2003. I’m not sure but I don’t think the additional logic required would actually fit in the size given. Also, at 3.0Ghz in 90nm a dual core chip will produce *vast* amounts of heat, you’re talking Max power figures approaching 200 Watts, it may be physically impossible to cool such a chip. The biggest bit which suggests it’s wrong is the bus speed, which is lower than the current top end Macs. I’ve no doubt they are working on dual core devices (they’ve almost said as much) but it makes more sense to base it on the POWER5. This is the other way around though, full of all sorts of details even giving the die size to 3 decimal places. are the same, 975 based on POWER 5, 980 dual core is as much detail there is. The early rumous of the G5 were along the lines of “IBM are developing a new 64 bit chip”. I made this comment on another board about this rumour:
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