Post Your Comment Please log in or sign up to comment. I really love windows! I expect that CnC per-core caused no problems under linux for example Privacy Policy. Contact Us. Terms of Use. Ugggh, got to page two before being disgusted this time. This author is back to writing fiction.
The Pentium 5th generation, in case the author didn't know, thus the "Pent" , DID execute x86 instructions. It was the Pentium Pro that didn't. That was the sixth generation. They can't execute x86 instructions effectively, so they break it down to RISC type operations, and then execute it.
They pay the penalty of adding additional stages in the pipeline which slows down the processor greater branch mispredict penalty , adds size, and uses power. If they are equal, why would anyone take this penalty? Admittedly, the terms aren't carved in stone, and the term can be misleading, as it's not necessarily the number of instructions that defines RISC.
Even so, there are clear differences. RISC has fixed length instructions. CISC generally does not. RISC has much simpler memory addressing modes. The main difference is, RISC does not have microcoding to execute instructions - everything is done in hardware. Obviously, this strongly implies much simpler, easier to execute instructions, which make it superior today. There is, however, some red fine print that defines how the AM3 processor will be limited in the AM2 socket. This was an absolute necessity as the only Phenoms that AMD had which were in any way competitive with the Core 2 Duos or Core 2 Quads were power hogs, and motherboards built around the old AM2 specification were often incapable of providing the required power.
In practice, this official line seems to be one hundred percent correct. In the short term, AM3 is not a significant step forward, as the only significant feature which has been added to the AM3 processors is support for DDR3 memory.
Currently, DDR3 memory does not offer a significant performance increase over DDR2, but as hardware progresses it is expected that DDR3 will become the standard of the industry, putting socket AM3 in a better long-term position. However, if you have an AM3 motherboard, you can only use it with AM3 processors.
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