3 ms·

Moores law held up pretty well. Frequency scaling did not continue as it did in the old days, I mean we had 3ghz back in the P4 days. But performance has certai

Moores law held up pretty well. Frequency scaling did not continue as it did in the old days, I mean we had 3ghz back in the P4 days. But performance has certainly improved thanks to better IPC, more cores etc.

Joky 8y ago
The law is about transistors I believe, not about frequency or performance, isn’t it?
- leetcrew 8y ago
  as originally formulated, yes, but no one really cares about transistor density itself; we care because it correlates well with performance.
- newman314 8y ago
  Not quite 5ghz. We have P8 based E880Cs running SAP @ 4.95ghz, iirc.
chriswarbo 8y ago
I remember reading about IBM Power chips running at 5GHz years ago (maybe it was https://hardware.slashdot.org/story/07/01/04/1824223/ibms-new-processors-to-exceed-5ghz https://hardware.slashdot.org/story/07/01/04/1824223/ibms-ne... ). Presumably they were too expensive (manufacturing, power, cooling, etc.) since they're not ubiquitous. IIRC the "barrier" to going any higher was the speed of light across the chip: running faster than 5GHz would require the output to be causally independent from the input!