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by StillBored
2489 days ago
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Because the designs predate the big push into extremely high efficiency processors. Like the big "server class" processors, the investment required to create a truly high efficiency processor is quite large. Small in-order cores with limited functional units, and lacking much of what makes a modern processor fast (vector units, specialty instructions/etc) can fool people into thinking that minimal clock domains/gating is sufficient to create a high efficiency design. |
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