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Modular PSU - What Does it Mean?

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post #1 of 22 (permalink) Old 02-22-2009, 12:15 PM - Thread Starter
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As the title states, what does modular, or non-modular PSU's mean?

Whats the difference, and which is better?

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post #2 of 22 (permalink) Old 02-22-2009, 12:18 PM
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A modular power supply is a relatively new approach to cabling, allowing users to omit unused cables. Whereas a conventional design has numerous cables permanently connected to the power supply, a modular power supply provides connectors at the power supply end, allowing unused cables to be detached from the power supply, producing less clutter, a neater appearance and less interference with airflow. It also makes it possible to supply a wider variety of cables, providing different lengths of Serial ATA power connectors instead of Molex connectors.

While modular cabling can help reduce case clutter, they have often been criticized for creating electrical resistance. Some third party websites that do power supply testing have confirmed that the quality of the connector, the age of the connector, the number of times it was inserted/removed, and various other variables such as dust can all raise resistance. However, the amount of this resistance in a good connector is small compared to the resistance generated by the length of the wire itself.
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post #3 of 22 (permalink) Old 02-22-2009, 12:19 PM - Thread Starter
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Originally Posted by Juggalo23451 View Post
modular psu are designed to use on the cable you need to hook up yuor compure for power. Which means better airflow
Can anyone explain this a bit more clearly?

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post #4 of 22 (permalink) Old 02-22-2009, 12:20 PM
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Modular PSU's have cables that well... unplug. Both are good, just some people prefer modular for cable management.

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post #5 of 22 (permalink) Old 02-22-2009, 12:20 PM
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Modular PSUs are constructed so you can unplug the cables you don't need from the PSU so they're not cluttering up your case, while with non-modular, the cables aren't removable.


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post #6 of 22 (permalink) Old 02-22-2009, 12:20 PM
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You plug the cable of a modular PSU into your components and the PSU, allowing you to use only the cables you need.


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post #7 of 22 (permalink) Old 02-22-2009, 12:23 PM
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"Normal":


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post #8 of 22 (permalink) Old 02-22-2009, 12:23 PM
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Modular PSU's dont have any connectors hooked to it to begin with, just ports for cables. So if you need a 4 pin molex connector, connect it to the PSU, then connect your drives or whatever. A Non-modular PSU has the cables hardwired into the power supply itself. When you put it into the case, all the wires are in there, if you are using them or not.

The advantage of modular is that you only use the cables you need, so the case is less messy, and improves airflow, that sort of thing. However, having more connections between the PSU and the unit being powered creates a slight voltage drop, and because of the connection the power from the PSU isnt quite as pure as it would be if there was that one less connection.

Non-modular PSUs only make the one connection at the device itself, which you cant avoid. The downside is that you need to find somewhere to stuff all those cables you arent using somewhere inside the case, which can hinder airflow and make things look messy.

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post #9 of 22 (permalink) Old 02-22-2009, 12:23 PM
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thats a modular psu you only connect the cables you need it helps with cable mangement airflow its really helpful in small cases
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post #10 of 22 (permalink) Old 02-22-2009, 12:24 PM - Thread Starter
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Awesome... think it would be wise to purchase a modular PSU?

I don't really seem to have airflow problems in my CM690, most of the cables sit at the bottom of the case (around or below the video card) and my 8800GT still runs super-cool.

Although, it is using a non-stock cooler..

Anywho - recommended or no?

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