Haswell’s so-called FIVR (Fully Integrated Voltage Regulator), is not intended to act as a full power management IC, said Gunther. It does not, for instance, handle any battery charging operations, he said.
“The goals for Haswell were very aggressive and midstream we doubled down and said we are going to do significantly better than those original aggressive goals using new techniques and new processes invented on the fly,” said Gunther.
Intel CPU designs are multi-year efforts, and the mid-project move to lower its power targets “speaks to adapting to the market,” said Hammarlund who is also an Intel fellow.
“During time the Haswell project was running many new form factors came into play,” he said. “Laptops are now twice as thin as when we started the project and tablets” were not originally a target system for Haswell, he added.
Click on image to enlarge.
Intel described FIVR in a recent press briefing.
Now the Haswell family, the first members of which will ship this year, “covers and incredibly wide range of products and segments and almost makes a home run in each one--which is a pretty tall order,” Hammarlund said.
Both tablets and servers share a requirement for maximum performance at minimum power consumption so “the core part of the design--except for a few segment-specific features is very synergistic between segments,” Hammarlund said. “The separate uncore or system agent comes in one version optimized for clients and another optimized for servers with different memory technologies, I/O and other capabilities,” he said.
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