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Apple Computing Products:
macOS - Notebook Hardware
MacBook Air fan goes WAY over 6200 RPM via hacking :D
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<blockquote data-quote="andreigherghe" data-source="post: 1240113" data-attributes="member: 202381"><p>Hello guys!</p><p>I just downloaded SMC and started playing with it.</p><p>After reading & documenting, i saw that the max speed of the MBA fan is 6200RPM</p><p>And i asked myself, "What if i use a higher value?"</p><p>This question popped up because i remember that one day, while i reseted my PRAM, the fans goed to like 11000RPM (They where making the sound of a chainsaw <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /> )</p><p>So, i wanted to try 6300RPM</p><p></p><p>First, [CODE]python -c "print hex(6300 << 2)"</p><p>[/CODE]</p><p>Result, [CODE]0x6270[/CODE]</p><p>So, i'll use 6270</p><p></p><p>Second [CODE]sudo smc -k "FS! " -w 0001[/CODE] to force the fan to my speed</p><p></p><p>Third, [CODE]sudo smc -k F0Tg -w 6270[/CODE]</p><p>To set the target speed to 7200RPM</p><p>I could hear that they are going faster. Now i am on 7200RPM, in the hot summer, and only 54 Degrees celsius <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>I'm wondering, what's the REAL MAX speed this fan can go?</p></blockquote><p></p>
[QUOTE="andreigherghe, post: 1240113, member: 202381"] Hello guys! I just downloaded SMC and started playing with it. After reading & documenting, i saw that the max speed of the MBA fan is 6200RPM And i asked myself, "What if i use a higher value?" This question popped up because i remember that one day, while i reseted my PRAM, the fans goed to like 11000RPM (They where making the sound of a chainsaw :D ) So, i wanted to try 6300RPM First, [CODE]python -c "print hex(6300 << 2)" [/CODE] Result, [CODE]0x6270[/CODE] So, i'll use 6270 Second [CODE]sudo smc -k "FS! " -w 0001[/CODE] to force the fan to my speed Third, [CODE]sudo smc -k F0Tg -w 6270[/CODE] To set the target speed to 7200RPM I could hear that they are going faster. Now i am on 7200RPM, in the hot summer, and only 54 Degrees celsius :) I'm wondering, what's the REAL MAX speed this fan can go? [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
MacBook Air fan goes WAY over 6200 RPM via hacking :D
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