Is This Cable Actually Ok? (dual 8-pin PCIe to 12-pin Nvidia)

[philo-sofa]

When my cable arrived I realised that two of the pins on the 8-pin connectors are missing. Nvidia's own adapter uses all eight pins and I've heard that missing these extra pins means the card isn't grounded or that the adapter is only able to draw six pin levels of power (i.e. 150w from each 8-pin adapter).

Perhaps this make sense because 2*6=12. Does anyone know what the missing pins actually are and whether this will be a safe cable to use? Would prefer not to blow up my GPU RN for obvious reasons.

Photos:

 

[philo-sofa]

I had a EZDIY cable like that and it stated that it was not to be used on RTX3090 cards. I actually ended up making my own cables as when I took the cooler off my 3070 to fit the block I discovered that what I thought was the power connectors connected to the pcb were in fact just very short adaptor cables and the pcb had a pair of thin single row 8 pin sockets.

I actually had the same EZDIY cables. As near as I can tell the warning about the 3090 was because it uses 18 AWG cables (whereas this one uses larger 16 AWG cables).

I returned the EZDIY cable as it was also missing these two pins and I'm now scratching my head about whether it's safe to use these MODDIY cables given they have the same issue.

 

[philo-sofa]

Any opinions on whether this is safe?