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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RISC versus CISC? REALLY?
by aaronmcohen on Mon 19th Sep 2011 22:25 UTC
aaronmcohen
Member since:
2011-09-19

I think it was Linux Torvolds who said that at the end of the day you are performing the same amount of work whether your processor is CISC or RISC. In full disclosure I work for Big Blue on the software side. My opinion is my own and doesn't represent anyone else living, dead, or yet to be born.

Will X86 appear in the high end? Of course they will. However as the article states RISC is not going away. At the top you are already seeing hybrid mainframes made up of x86_64 and power/RISC processors. The hybrid approach is to address specific workloads. The interesting thing is the intel machines that make it on the top500 are mainly driven by GPU and not CPU power.

The top is about raw efficiency and governance. As I quoted before, the difference between RISC and CISC workloads is negligible but it is what surrounds the processor that makes the difference. RISC based mainframes have nearly 100% workload efficiency which is very important at the top. It may not be important for a desktop but for data centers it is. Since data centers drive the Cloud services that provided content for many of our connected ARM devices, this market is growing. If anything I believe X86 will be reducing in number. It will be slowly replaced from the bottom by ARM.

Now of course someone is going to state that you can buy enough cheep x86 machines to top the 500 list but you end up paying the difference and then some in electricity. Unless you are from a country that has cheap electricity or have your own renewable energy generator (wind turbine, geo thermal, etc...).

In short I agree that Intel will increase their numbers in the high end market but I don't think the RISC processor numbers will decrease, I think the high end market will get bigger mainly driven by cloud services and virtualization.

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