{"id":23713,"date":"2024-01-09T21:31:58","date_gmt":"2024-01-09T12:31:58","guid":{"rendered":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=23713"},"modified":"2024-01-09T21:31:58","modified_gmt":"2024-01-09T12:31:58","slug":"rpi5%e3%81%ae%e7%b4%94%e6%ad%a3%e3%82%b1%e3%83%bc%e3%82%b9%e3%81%ae%e8%93%8b","status":"publish","type":"post","link":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=23713","title":{"rendered":"RPi5\u306e\u7d14\u6b63\u30b1\u30fc\u30b9\u306e\u84cb"},"content":{"rendered":"
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Raspberry Pi 5 Model B 純正ケースの蓋を開けたところ<\/figcaption><\/figure>\n<\/div>\n\n\n

Raspberry Pi 5 Model B (RPi5)にFan付きヒートシンクをつけた場合のStressberryによるストレステストの際の温度変化は二重の時定数があるような面白い曲線<\/a>になりました．<\/p>\n\n\n\n

\"Raspberry
Raspberry Pi 5 Model B 8GB w\/ active heatsink<\/figcaption><\/figure>\n\n\n\n

この動作中にファンの回転数が変わるのか，ケースの蓋を開けて観察してみました．Stressberryによる温度変化は次のようになりました．<\/p>\n\n\n\n

\"\"
Raspberry Pi 5 Model B 8GB w\/ active heatsink w\/o case lid.<\/figcaption><\/figure>\n\n\n\n

ベースラインの温度が2〜4℃ほど低い上，フルロード時の温度は最大で10℃も低いです．<\/p>\n\n\n\n

アイドル時の温度は46℃台なのでファンは停止していました1<\/a><\/sup>ファンは47℃以上で動作する仕様だそうです．<\/span>．フルロードですぐにファンが回転し始めましたが，その後回転数が上がったようには見えませんでした（確かなことは言えません）．<\/p>\n\n\n\n

どうやら二重時定数の長い方の時定数はケース内全体の熱に依存するといえそうです．そうなるとやはりアクティブヒートシンクとケース内全体の熱を排出するファンの組み合わせ2<\/a><\/sup>デスクトップPCと同じ．<\/span>が一番良さそうです．<\/p>\n\n\n\n

CPUがフルロードになるような使い方はしないと思いますが，CPUの温度が上がったらケースの蓋を外すことにします．<\/p>\n","protected":false},"excerpt":{"rendered":"

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