Linked by David Adams on Mon 19th Sep 2011 16:51 UTC, submitted by estherschindler
Intel With the Xeon 7600 line, Intel is finally using the 'R' word: RISC. It's targeting the mission-critical market dominated by Sun SPARC and IBM Power with the new chips, a first. Can the Xeon E7 processor deliver Intel's final blow to the RISC market, which includes its own Itanium?
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RE: RISC versus CISC? REALLY?
by Silent_Seer on Mon 19th Sep 2011 22:50 UTC in reply to "RISC versus CISC? REALLY?"
Silent_Seer
Member since:
2007-04-06

I am sure you know what you are talking about, but there is a small mistake in there IMO. IBM's mainframe processors are not actually RISC but CISC. I am sure they share a lot of their internals with IBM's power processors, but the ISA is CISC. Ofcourse what you probably meant was x86 Vs the rest of the market where the rest of the market was labelled as RISC. And the rest of the market is often RISC, the only exceptions are the Itanium processors and IBM's Z series.

Reply Parent Score: 2

JAlexoid Member since:
2009-05-19

IBM's* z line CPUs(the mainframe stuff) are not Power. They have different tasks at hand, they were built for a different environment. There is literally no other CPU that was specifically built like z was and not a single one can compare.
The z CPU was never intended for high load processing, it was created for total throughput. Thus Watson is not on a z CPU, but on Power. And IBM's Supercomputers are on Power instead of z. In fact, Power CPU was a result of the early IBM's supercomputers.

* - my former employer

Reply Parent Score: 3

tylerdurden Member since:
2009-03-17

The POWER CPU is the result of an early IBM text processor.

Reply Parent Score: 2

aaronmcohen Member since:
2011-09-19

There are very few true RISC processors left. The longer processors are on the market the greater the instruction set gets. You are correct. I used the term RISC to mean the market which includes IBM, HP, SUN/ORACLE, etc...

Reply Parent Score: 1

bogomipz Member since:
2005-07-11

There are also very few true CISC processors left. The complex instructions are programmed in microcode running on a very simple instruction set implemented in hardware. You could almost say that RISC and CISC sort of converge towards each other to a more optimal golden middle, but not quite. There are still differences between the two, such as special purpose vs general purpose registers, address modes, etc.

Reply Parent Score: 2