Maximum fan current rating for the motherboard.
Maximum fan current rating for the motherboard.
I need to find out which fan size fits properly for an ASRock fatal1ty h87. I'm unsure if a 0.2A, 0.5A or 3.9A fan is suitable. (I also want to know about Delta fans.)
It seems the 3.9A fan won't be properly supported. You might consider using a fan hub that connects directly to the 12V from the PSU. This setup allows the master fan plugged into a specific port on the hub to control speed, while other fans adjust accordingly. This particular hub is a PWM model:
https://www.silverstonetek.com/product.p...en&pid=526
Even with just one fan connected, power isn't coming from the motherboard. Still, 3.9A is quite high. You'll need to ensure your PSU's 12V rail can handle it. The controller you mentioned may not be compatible.
I remember 1a being a typical limit for a motherboard fan header. But checking it thoroughly is usually better if you plan to exceed that. Could you clarify the exact circumstances and your reasoning for requiring such a high RPM fan with motherboard management?
I saw a discussion suggesting the amplifier support is likely around 1A for this kind of motherboard fan port. The two fans mentioned have less than 0.55A each. The product links provided are available if you need more details. Would you say they would work with ~120 CFM and ~10 mmH2O?
geofelt :
I remember that 1a is typically used as a standard for a motherboard fan header. However, if you're planning to exceed that limit, it's best to double-check. Could you clarify the exact circumstances? You seem to be dealing with a small PC that tends to overheat, especially in a case with two 120mm fan slots. The noise level isn't an issue, so power consumption probably isn't either.
It seems like you're evaluating a 3-pin fan setup with a current draw of 0.46A and a peak rating of 0.70A, likely during startup. The recommendation is to test it if your motherboard supports 3-pin fans. For caution, consider using a hub or a Molex adapter to connect directly to the PSU at full speed, or add a speed controller if you need to regulate the fan speed. This setup appears suitable for a mission-critical system based on these parameters.
Ok, so this setup involves a 3-pin fan with a current draw of 0.46A and a peak rating of 0.70A, likely during startup. If you're comfortable with these specs and your motherboard supports 3-pin fans, give it a shot. For extra caution, connect it via a hub or use a Molex to a 3-pin adapter, powering it directly from the PSU at full speed or add a speed controller if needed. Is this a mission-critical system? It will be, depending on how it performs.
OK, so no risk of interrupting existing processes, but risk of delaying startup of your intended endeavor if you overload the fan header(s) and damage the mobo. Personally, I would go the way of peace of mind and use a hub to power the fans. You're talking maybe an extra $20 versus delays and $$$ to replace a mobo if it's damaged beyond repair. Now, the damage could be limited to just the fan header if a component within the fan circuit fails, but with multilayer circuit boards a burnt trace can take out neighboring circuits. Is 1.4A going to burn up your mobo? We simply don't know if the mobo manufacturer doesn't specify, but the most common fans don't really use more than 0.13 to 0.15 A and unless it's a high performance board designed for overclocking I would assume the mobo was designed for average fans. Bear in mind that you need to know if your mobo supports 3-pin or 4-pin fans. The hub I linked to above is for 4 pin fans. Here's a hub for 3-pin fans with a knob for speed adjustment and they were even kind enough to specify max current capability of 3A for the device:
https://www.newegg.com/Product/Product.a...-_-Product
Hey! Your mobo definitely has "Performance" in the name. At 0.46A each, it should work fine if you connect both fans.