Yes, that's correct. And not only that, I need a LONG cable, approximately 2 feet, since my final 2 GPUs are the furthest away from my PSU.
These cables came with my Thermaltake PSU,
except it only included 2 of them and I need 3 of them.
Also I need 6-pin PCI MALE to 4-pin molex FEMALES (opposite of what you mentioned)
Just to confirm, you're actually looking for a modular cable of molex connectors for your PSU, right?
A 6-pin PCIe (female) to 3x 4-pin molex (male) passive adapter would be an unusual item, since all of the molex connectors would be missing the 5V line.
The PSU end of modular power cables are not standardized well, and 6-pin PCIe power connectors are distinct from the 6-pin connections on the side of a modular PSU.
I would check the literature and box contents.
There should be 3 cables as that is what was included with my PSU (2 connectors per cable).
If not then contact thermaltake's CS and they will look into it.
Once you do have the cables you'll need to move the gpu's a bit closer to make the 3rd cable reach (as running of the pci-e cable is most ideal instead of messing around with molex connectors to run the gpus-depnding on what you're running). doesnt make sense to be running a 1200w psu through molex (just my 2 cents)