Unfortunately, no, it is not.

More wires do not always mean it is better nor safer. Adding countless unnecessary joints and splits to a cable will not give you any more power, instead they are simply yet another possible point of failure.

Take the Nvidia adapter as an example, if the problem is a bad contact resulting heat, using more 8-pin splitting simply cannot prevent such a problem.

Some people say the 4th 8-pin is meant for redundancy, then 10 x 8-pin is better than 4 x 8-pin, right?

Now, take a look at the original Corsair 12VHPWR 600w cable, it is using 2 x 8-pin with 12 power wires and 2 sense wires. 14 dedicated wires in total with no joint and no split. This is all you need to supply 12VHPWR 600w properly for any modern PSUs.

If you are using a good quality PSU (like Corsair, EVGA, Seasonic, Asus), there is simply no reason (nor benefit) at all to use a 4 x 8pin direct cable.

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