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A Glance at Apple's Dual G4 PowerMac
(Click here to view the original thread with full colors/images)
Posted by: TotalRecall
Ace's Hardware has taken a quick look at Apple's fastest PowerMac, running dual 1.25 GHz G4's.
Apart from the clockspeed, the G4+ compares very well to the current chips from AMD and Intel. It has about the same execution resources, and should be able to execute and retire up to 3 instructions per clockcycle, while the Athlon is limited to 3 (x86) and the Intel Pentium 4 is probably limited to 2 (x86) instructions (the trace cache can issue at most 3 micro ops, and an x86 instruction is probably on average 1.5 micro ops). It is very hard, of course, to compare the G4+ and the x86 CPUs on this basis as they use a different instruction set. Nevertheless, the more x86 complex instructions are avoided as much as possible and the simple instructions (ADD, MUL, Load, Store) are the most important ones. We can therefore compare the G4 with the x86 CPUs in a very crude way.
View the entire article here.
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