人類的大腦功率是多少？

01-04

人類大腦是消耗化學能的吧？但是要是想科學計算一下，大腦處理問題的速度和功率是多少？和世界上最先進的CPU比呢？效率又是多少呢？

"The brain makes up 2% of a person"s weight. Despite this, even at rest, the brain consumes 20% of the body"s energy. The brain consumes energy at 10 times the rate of the rest of the body per gram of tissue. The average power consumption of a typical adult is 100 Watts and the brain consumes 20% of this making the power of the brain 20 W.""Barely enough to run a dim light bulb."

The most accurate simulation of the human brain to date has been carried out in a Japanese supercomputer in 2014, with a single second』s worth of activity from just one per cent of the complex organ taking one of the world』s most powerful supercomputers 40 minutes to calculate.

Researchers used the K computer in Japan, currently the fourth most powerful in the world, to simulate human brain activity. The computer has 705,024 processor cores and 1.4 million GB of RAM, but still took 40 minutes to crunch the data for just one second of brain activity.

The project, a joint enterprise between Japanese research group RIKEN, the Okinawa Institute of Science and Technology Graduate University and Forschungszentrum Jülich, an interdisciplinary research center based in Germany, was the largest neuronal network simulation to date.

It used the open-source Neural Simulation Technology (NEST) tool to replicate a network consisting of 1.73 billion nerve cells connected by 10.4 trillion synapses.

While significant in size, the simulated network represented just one per cent of the neuronal network in the human brain. Rather than providing new insight into the organ the project』s main goal was to test the limits of simulation technology and the capabilities of the K computer.

參見煎蛋這篇文章：

關於大腦的十件事

結論：人腦重量只佔體重的2%，卻會消耗整個身體所需能量的17%和氧氣的20%。大腦的功率約在10-23瓦

功率不知道，俺是碼農，在寫程序寫的最瘋狂的時候，真的會頭頂發熱。

能耗不清楚，不過能效肯定比CPU高，要知道最先進的處理器絕大多數的耗電都被轉換成無用熱量了，還要浪費大量能量來散熱，能量對人體來說還是很珍貴的吧，能效更高才能從自然界生存下去吧

具體不知道，我覺得最大消耗與最小消耗能差別很大很大，就像你的肱二頭肌一天連續干體力活兒與整天休息功率是不一樣的。

可以參考酷睿6代各個處理器的功率（不說笑）

如果你的智商很弱，最大功率就是50-65左右

你智商不錯，比較聰明，90-100W

你智商感人，140W

上面都是最大功率，滿負載情況其實並不多

你摸小孩的頭，你會發現，真燙，我的頭好像也很燙

可以點亮一個燈泡

聽說是15W