Originally posted by Catfish_Man
Actually VLIW (Very Large Instruction Word, or, as Intel calls it, EPIC, Explicitly Parallel Instruction Computing) is to RISC what RISC is to CISC. Putting even more pressure on the compiler to take stuff off the chip (in this case, out of order execution).
As for the 2GHz 750, IBM is certainly capable of making a chip that fast (although I would guess it would be similar in pipeline depth to the 970 to hit 2GHz, so around 14-15 stages), I just can't see why they're calling it a 750 (or why they're making it in the first place. Apple can't be their only customer for it). 750s are G3s. This thing, whatever it is, is definitely not a G3 by any usual definition (Once you've changed the execution core, bus interface, and added a SIMD unit, what's left to change?). The other problem is targetting such a chip. At 2GHz, with the added execution units, it's not going to be anywhere near the 3.6 watts the current 750FX draws, so it'll have to target a different market. It's certainly not high enough end for servers (especially if they keep the G3's limited multiprocessing capabilities), so there only seems to be one market left. AFAICT, that market (Apple/Blade Servers/Workstations) is served more than adequately by the PowerPC 970. I just can't see where IBM would be headed with a chip like this.
Also, Intel's chips are basically RISC chips with a translator stuck on the front. IBM has a slightly more advanced manufacturing process (silicon on insulator), but also relies heavily on automated design (for POWER4/970 anyway) which gets slightly worse performance. I seriously can't see how IBM is "light years" ahead of Intel. I would say, "inches", or perhaps even "meters", but not light years.
Lastly, the 745x series is Moto's property. I would be greatly surprised if Moto were to sell IBM the chip that's been causing IBM so much pain in the high end embedded market. If they did, though, it might be fairly interesting.
I know Intel started from a RISC design when they put Itanium together. Honestly, I haven't read much on the chip because I haven't cared about it. Had they released it two years ago, as they had intended, I likely would have cared a lot more.
I should have clarified on the Moto bit. I meant to imply a stretching of the pipeline since the 745x has a 7 stager, I think. They did modify that, including extending the pipeline - and it was still a G4 by Apple's standards.
And I would say IBM is light years ahead of Intel. Wanna know why? They've driven the 970 up to 4.2 GHZ at .13. It's too hot for anything but a well cooled, large-cased tower - but it can run without burning up or causing fires. Remember, IBM is ahead in the copper game, giving them a more efficient means of transferring heat energy, etc. They're architecture is also more advanced. To say that IBM is only meters ahead of a chip that is running on a 20 year old architecture is ludicrous. Yes, I know the x86 design has been modified - but only so much.
I'll also admit to not being the chip nut and understanding every detail. My brother is much better at it than I - he's got the Computer Engineering degree and designs stuff. He's a PC guy and likes Intel, but has openly said that IBM is far superior at building chips and making them more efficient.
I do know IBM has a 750 chip running at 2 GHZ that will go to 3 at .09. I'm only guessing the pipeline has been changed. I know the FSB speed has been. Even I know that a chip running with 4 stages @ 2 GHZ isn't gonna happen - although it would make Intel look bad if IBM were able to find a way to make a 4 stager running that fast - and making it cool.
I do know the 1.5 is designed for laptops & that it draws slightly more than the 900 MHZ chip in the new iBook. You think Intel could make a 900MHZ chip with 4 stages and make it power efficient and cool like IBM has? I don't think they could do it in their dreams. I also don't know if it'll still ne called a 750. I do know they started with the 750FX and went from there and have been working on this thing for a year.
I admit to not having all the tech data on these things, but I'm confident that you'll get to see it sometime in the summer.