How many fans can i run off of my motherboard
- Thread starter Jackjck
- Start date
Solution
- Feb 22, 2015
- 4,102
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- 39,040
Your motherboard has two fan headers (CPU_FAN and CHA_FAN). Without using any Y-splitters or fan hubs, the maximum fans you can install is 2 (one fan in each motherboard header).
If you use Y-splitters or fan hubs, the maximum number of fans you can install will be dependent on the fans' total ampere/current draw. Each fan header of your motherboard can provide a max. of 1A current, unlesss stated otherwise in your manual. So, you have to check each fan's current draw rating (which is usually provided for on the fan's sticker or box). The total current draw of all the fans connected to a single header should not exceed 1A (or for headroom, at least max. of 75% of 1A or equal to ~0.75A to be safe).
For example, you have a fan that is rated at 0.35A, another fan rated at 0.12A, another at 0.26A, and another at 0.31A. Running all these fans off of one header will total to 0.35A + 0.12A + 0.26A + 0.31A = 1.04A! This has exceeded the 1A max. rating of the header.
So, you can should decrease the number of fans, say 0.35A + 0.12A + 0.26A = 0.73A on 1 fan hub and run the 0.31A solely on another header. Alternatively, you can use Y-splitters by using the 0.35A + 0.12A = 0.47A on 1 header via splitter and another set 0.26A + 0.31A = 0.57A on another header via another splitter.
If you use Y-splitters or fan hubs, the maximum number of fans you can install will be dependent on the fans' total ampere/current draw. Each fan header of your motherboard can provide a max. of 1A current, unlesss stated otherwise in your manual. So, you have to check each fan's current draw rating (which is usually provided for on the fan's sticker or box). The total current draw of all the fans connected to a single header should not exceed 1A (or for headroom, at least max. of 75% of 1A or equal to ~0.75A to be safe).
For example, you have a fan that is rated at 0.35A, another fan rated at 0.12A, another at 0.26A, and another at 0.31A. Running all these fans off of one header will total to 0.35A + 0.12A + 0.26A + 0.31A = 1.04A! This has exceeded the 1A max. rating of the header.
So, you can should decrease the number of fans, say 0.35A + 0.12A + 0.26A = 0.73A on 1 fan hub and run the 0.31A solely on another header. Alternatively, you can use Y-splitters by using the 0.35A + 0.12A = 0.47A on 1 header via splitter and another set 0.26A + 0.31A = 0.57A on another header via another splitter.
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