7,723 karma · joined September 2, 2014
Depends on how many bits you had to start with. On Power ISA they aren't common either, but when they happen you need up to seven instructions (lis, ori, rldicl, oris, ori, then for branches mtctr/b(c)ctr) to specify the new address or larger value. Most other RISCs are similar when full 64-bit values must be specified. This is a significant savings.
https://www.talospace.com/2021/04/prefixed-instructions-and-...
Raptor is well aware of their price premium and tried very hard with the Blackbird, though I wanted the expansion power in the Talos II and would have always bought the bigger system first. But they still have to make a profit and I want to support them in it.
The Quad is also very quiet in idle, but you have to downclock it in System Preferences to be as silent as the T2 is in normal operation, and even with a well-maintained liquid cooling system the G5's roar at full tilt is loud (it's really loud if it's not). The high speed fans in the T2 are more like a quiet whine than what the G5 generates, let alone the wind tunnel MDD G4 I ran before that. And no LCS!
And the G5 is doing that with four cores and four threads, while the Talos II is doing that with sixteen cores and 64 threads. Now, the Quad G5 also came out in 2005, and I got the T2 in 2018. But thirteen years later I'm happy to say that the noise level is absolutely no worse than any other modern workstation on x86_64.
Diamonds is a flawed movie and one of the weirdest Bonds, but it's my favourite because it's so weird.
I also suspect you're making the typical mistake of confusing PowerPC with modern Power ISA. They overlap strongly and PowerPC was virtually designed to be 64-bit ready from the very beginning, but chips based on the modern ISA are much more sophisticated.
As someone who actually works on ppc64, the biggest two things that bother me about the ISA are the weirdness with r0 and the large number of instructions that must be implemented to be practical on a new design. Those are comparable to the quirks of any other "successful" ISA by your standards. They hardly make it junk.
I might not buy another base station again, though, if this gets enforced at that level.