0
\$\begingroup\$

What will happen when the supply and ground are connected for a CPU fan with PWM but the PWM wire is not connected? Will the fan run at its full speed?

\$\endgroup\$

closed as off-topic by brhans, RoyC, JRE, pipe, DoxyLover May 12 at 1:50

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design." – brhans, JRE, pipe, DoxyLover
If this question can be reworded to fit the rules in the help center, please edit the question.

2
\$\begingroup\$

You can connect a 4-pin fan (PWM controllable) to a 3-pin motherboard connector (non-PWM) without issue.

Most fans will simply run at full speed when the PWM pin floats.

\$\endgroup\$

Not the answer you're looking for? Browse other questions tagged or ask your own question.