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Some high-end motherboards offer combinations (like an 8-pin and additional 4-pin connection) to spread out the voltage, but these are rare.

CPU motherboard cable: This cable also runs to the motherboard, but is used to power your CPU.

It’s worth paying attention to how many pins your motherboard uses and making sure you buy a power supply that can handle it.

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Most high-end power supplies have 20 pin plug, plus an additional 4 pin plug so that you can plug it into either type of motherboard.

Main motherboard cable: This cable runs directly from your power supply to your motherboard, and plugs into the board using 20 or 24 pin plug.

#Replace mac mini power supply Pc#

The cables that run from your power supply to the various components in your PC generally standardized, but there are three crucial types you want to check for compatibility with your specific machine:

#Replace mac mini power supply how to#

RELATED: How To Upgrade To A New PC Case What Cables Do I Need? At this point, a complete PC replacement might be more practical. If you’re upgrading because you don’t have enough power in your current power supply and your case won’t accept anything bigger, you’ll likely need to upgrade your case as well, and move all of your other components into it. If you go even smaller, things tend to get non-standardized, and you’ll want to look for a replacement for your specific model. (At this size things can get confusing, since some enthusiast Mini-ITX cases can also fit a full-sized ATX power supply for beefy gamer configurations.) SFX and TFX power supplies are for small, compact cases. These power supplied generally top out at around 400 watts, though some more expensive and more powerful units are made. These include “small form factor” cases and those that are meant to hold smaller standardized motherboards, like Micro-ATX and Mini-ITX. On the opposite end of the spectrum, some cases are too small for even a normal-sized ATX power supply. If you do have a monster PC, look up the case’s specifications: it will let you know the maximum dimensions of the power supply bay. Unless you specifically bought or built your computer to have a ton of power, you probably don’t have to worry about it. Sometimes these extra-large ATX power supplies will have trouble fitting into a standard case, and require oversized “gaming” or workstation cases. These are the monsters that can power high-end CPUs, multiple GPUs, arrays of storage drives, and a wind tunnel’s worth of cooling fans, stretching from 900 watts all the way up to 1200 watts and beyond. Some ATX-standard power supplies are longer than normal, stretching to eight or ten inches long, but keeping their width and height standardized. These fit into almost all full-sized desktop computers, and you’ll find them ranging in power from around 300 watts all the way up to 850 watts. The most common size for power supplies is “ATX”-the same standard name for a consumer-grade “tower” computer. That’s what “form factor” means: there are a few standardized sizes for power supplies, and odds are that one of them will fit the case you’re already using. What Form Factor Should I Choose?Īfter you’ve determined how much power you need, you’ll need to find a power supply that physically fits in your computer. Add a little bit for a safety margin, and you have wattage you need your PSU to deliver. Just plug in your components and it gives you a recommended wattage. If you’re not entirely sure about your PC’s power supply needs, check out this handy online calculator. A margin of error is a handy thing to have, not to mention the fact that having a little extra power gives you room to add more components in the future-like extra storage drives or cooling fans.

And since the graphics card specifications recommend at least a 400 watt power supply, that’s where we’ll start.

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120mm fan for CPU cooler: under 10 wattsīased on these general figures, we can estimate that the How-To Geek desktop won’t use more than 350 watts under its full load.

RAM: under 5 watts per DIMM – estimate 20 watts for our build.

Graphics card (Radeon RX 460): 114 watts at peak.

Here are the power requirements for the rest of our test build’s components: On Intel’s website, we see that the processor draws an average of 91 watts under high load. For example, our test machine at How-To Geek uses an Intel Core i7-7700K processor. If you want to estimate your power requirements, look at the specifications of each component in particular. These are typically require much lower power, and can usually get away with rough estimates. Other components also draw power, including hard drives, optical drives, and cooling systems like fans or radiators.