How to choose extension cables for a power supply

There is a complete sector inside power provides that’s more and more booming exactly due to one other market that’s altering, that of PC circumstances. The producers of power provides compete onerous in all of the strata, however only a few are those who though competing for worth, they provide cables each time of larger size. Therefore, having elevated the common measurement of the chassis by a few centimeters in contrast to a few years in the past, the cables can fall quick.

PC and PSU extension cables, a partial resolution to the issue


We should concentrate on this from the foundation earlier than entering into the matter, since many could also be pondering of shopping for a PC, a power supply and due to this fact its meeting and particularly its wiring additionally known as cable administration.

This is one other of the important thing components if our chassis is full tower, because the extensors are important. And it’s that the peak and the channeling of the cables make the sources stay quick of their cables and their size. Manufacturers refuse to improve costs by including extra size to the collection cables as a result of, aside from the associated fee, it has implications associated to their impedance and resistance to the passage of present.

This is undoubtedly a downside, however they don’t present options as a common rule, resembling together with serial extenders for the cables, or immediately together with them sleeved to give you the option to isolate them and obtain larger size. It is a separate market the place they make a lot of cash, so it is not going to change after all.

With this understood, now we are able to see what are the components that decide the selection of an extension cable for our supply and the way not to fail within the try.

AWG, the primary issue to consider


AWG is the acronym for American Wire Gauge and as such it’s nothing greater than a method to measure the standard of the cables, it’s a method to classify the thickness of the identical when it comes to the wires and the sheets.

Therefore, AWG can be accompanied by a quantity from 0 to 1000, the place curiously the dimensions doesn’t begin at zero, however goes from 1000 to zero and from there it goes up to 40. Normally, the power provides embrace this information of their cables as little as it’s of high quality, however as a rule we’re speaking about that the business works from AWG 20 to AWG 16, at the very least for the second and so as to see if there are modifications by the NVIDIA 12-pin connector.

In any case, a decrease quantity within the cables signifies larger thickness and due to this fact larger obtainable space, much less resistance to copper and extra complete present face up to, due to this fact, greater high quality.



Another essential issue is the plastic connectors. It should be taken into consideration that in sure roughly excessive eventualities the cables get a lot of temperature, particularly if their AWG is excessive and a lot of power is being requested from them.

There are cables which might be actually temperature restrict, the place they’re highly regarded to the contact, so the connectors and their materials is one thing to consider, since after lengthy hours of use small deformations can happen in them, the place probably the most essential level is exactly the place the 2 cables come collectively.

A foul connector will find yourself yielding the anchor of the climbed and it might go away some cables free, particularly if the posture of the cable or cables will not be good and they’re strained. It will not be needed to suppose that we’ve to do excessive overclock or a lot much less to get to this, presently high-end CPUs and GPUs handle to devour greater than 200 watts and 350 watts with out an excessive amount of downside, so it’s a actually severe and worrying subject, about all with low and mid-range sources.


It appears a lie, however there are customers who pressure the cables at their ends to insane ranges. PSU cables are usually clamped to a very excessive precision and have to be subjected to excessive posture and stress to come off, until the producer and mannequin are of questionable high quality.

This is why extenders have to be actually good at this, as naked or out of contact wire, or simply partial contact, is a element hazard. Anyone who has assembled a whole bunch of PCs could have seen this downside, which with the passage of time in these PCs is changing into increasingly more widespread.


Let’s not skimp when it comes to selecting size (if potential) besides if we’re speaking about a field with compact dimensions, the place any widespread extension can be helpful on this part. As we’ve stated, as a rule the packing containers are getting larger due to the AIO methods.

That additional top or width, that are usually between three and 5 cm make the cables barely attain to join for instance the EPS cables, that are probably the most sacrificed for being the norm on high of motherboards.

Like every part, the extenders have a most size to preserve the depth of the present and never create extra electrical resistance, so clearly it’s a limiting issue.

Mix completely different AWG on the extension cables

Power source cable

It is true that there are fashions of power provides that don’t specify the AWG of their fashions and cables, however as quickly as we search the Internet, we’ll absolutely discover such data. It is essential as a result of there’s a quite common mistake in most customers: mixing cables and extenders with completely different AWG.

Although we communicate of barely 30 cm of extenders In most circumstances, opting for a completely different AWG produces voltage drops, minimal sure, it’s true, however these drops due to the completely different resistors have an affect on the power supply once we discuss nanoseconds of variation resembling these produced by GPUs or Current CPUs, the place all the consumption vary is dynamic and quicker and quicker to alter increasingly more to power effectivity wants.

We already noticed the issues with the RTX 3000 and sporadic reboots, the place they didn’t even require excessive graphics load. So the perfect is to use extension cables with the identical AWG because the cables of our power supply to keep away from surprises.