All it should do without CPU and RAM is make a few beeps to tell you about that fact. If you call that 'working', the answer is yes.
Can I power on my motherboard without CPU, RAM, GPU and HDD just to test if it is working and also the fans ?
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Can I power on my motherboard without CPU, RAM, GPU and HDD just to test if it is working and also the fans ?
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All it should do without CPU and RAM is make a few beeps to tell you about that fact. If you call that 'working', the answer is yes.
You might need a cpu to keep the power good signal active.
That may vary by mobo.
Perhaps someone with more stick time can share what they have found.