Plan the 50cm Hydrus route from PSU port to GPU before adding it to an order

A 50cm figure on a spec sheet looks generous until you actually trace the path a Hydrus 16-pin cable has to take inside a real case. This is a direct replacement for your power supply's native cable, not an extension with slack to spare, which means that number is the whole budget - not a starting point.

Quick Answer

Priced at R699 in either colour, this AsiaHorse cable has to cover the entire distance from your power supply's modular socket to the graphics card in 50cm, since it replaces the factory run rather than extending it. Measure the actual route before ordering - a straight-line tape measurement almost always underestimates it.

Why this cable's length works differently

The extension cables in the Hydrus range - the ATX and EPS versions - add a fixed amount to a factory lead that stays in place, so their length is effectively a bonus on top of what already reaches. This 16-pin cable is not that kind of product. It replaces the native cable at the supply's modular socket entirely, so its 50cm has to be the complete run: from the socket, through whatever turns the case forces on it, to the card's power connector.

Measuring the route properly

A tape measure answers a straight-line question, and the cable will almost never travel in a straight line. The more reliable method is running a length of string or a spare cable along the actual intended path - around the shroud, through whatever cutout the case provides, up to the card - and measuring that instead. It takes a few minutes and it is the only way to catch a route that looks short on paper but is not.

Which layouts eat the most length

Routes that cross over or behind a power supply shroud tend to run longest, because they add a vertical rise and at least one sharp turn to a distance that looks short when you are only picturing it from the side. A case with the supply mounted low in a basement chamber, coming up behind a tall card, is a common example where the real path is considerably longer than the straight-line distance between the two components would suggest.

Counterintuitively, a full tower with the supply mounted high in the chassis can sometimes offer a shorter practical run than a mid-tower with a lower, more enclosed supply position - case size alone does not predict how much cable the route will actually consume.

What happens if 50cm falls short

There is no length adjustment available for a cable of this type - it does not extend, and there is no accessory that adds to it without compromising the connector at either end. If the measured route comes up longer than 50cm, the options are changing the route (a different opening, a different card orientation), reconsidering the layout, or accepting that this cable is not suitable for that particular case and sticking with the factory-supplied lead instead.

Fold this into the pre-order checklist

Length sits alongside two other checks that matter before ordering: a native 16-pin socket on the power supply, and a card on AsiaHorse's compatible list (RTX 40-series, RTX 5080, RTX 5070 - never the RTX 5090). None of the three substitutes for the others, and all three are far easier to confirm before the cable arrives than after. Browse comprehensive cable solutions to compare this cable against its extension siblings, and Evetech's graphics card accessories selection fills in whatever a 12VHPWR build still needs.

Frequently Asked Questions

What exactly does the 50cm figure need to cover?

The complete run from the power supply's modular socket to the graphics card socket, including every turn the route takes along the way.

How is this different from the Hydrus ATX or EPS cables?

Those extend a lead that is already in place, adding their length on top. This cable replaces the run entirely, so its length is all there is.

What is the most reliable way to measure the route?

Running string or a spare cable along the intended path and measuring that, since a tape measure reads a straight line the cable will not follow.

Which case layouts tend to run longest?

Routes crossing a power supply shroud and rising up behind the card, which add height and a turn that a straight-line estimate misses.

What if the measured route is longer than 50cm?

There is no way to extend this cable. Change the route, reconsider the layout, or keep the factory cable if neither works.

Does a right-angle head save any length?

A little, at the card end, since the connector turns immediately rather than needing extra cable to curve away from the socket.

Is the length the same for both colours?

Yes. Black and white share the same 50cm length, the same 480W rating and the same Type A head.