Question PC wont start with new RTX 4070-S

[Aevee_]

I bought a new ASUS RTX 4070 SUPER OC.

Took out my old GTX 1060, connected the 12 pin PCIE adapter that came with the 4070-S to the 8 pin PCIE cable my 1060 was using, as well as another 8 pin PCIE I had laying around and had never used.

Inserted the 4070-S in, turned on the PSU switch and immediately see a red light coming from LED2 on the GPU. Try to turn the PC on and nothing happens, no fans spin, no sound, no other lights.

I took out the 4070-S as well as the PCIE cables. PC turns on successfuly again. I put the PCIE cables back in together with the 12 pin adapter (connected to the PSU and nothing on the other end), PC doesn't turn on!

I keep the PCIE cables in and take out just the adapter and it turns on again.

This leads me to believe either:
-The adapter that came with the RTX 4070-S is faulty.
-The PCIE cable I hadn't been using before is faulty.
-PSU is too weak?

PSU is a CoolerMaster 750W 80+ Bronze.

Other specs in case relevant:
CPU: intel i7 9700k
MOBO: Gigabyte Z390 UD
RAM: 32GB Corsair Ballistix DDR4
HDD: WD Blue 500GB
SSD: Nvme WD Black SN750

is my PSU supposed to be strong enough? is there anything else I should try?

 

[Lutfij]

Welcome to the forums, newcomer!

PSU is a CoolerMaster 750W 80+ Bronze.
How old is the unit? Coolermaster is the brand of the unit, while 750W is the advertised wattage of the unit and 80+ bronze is the advertised 80+ efficiency rating of the unit what is the model of the unit?

 

[Aevee_]

Welcome to the forums, newcomer!

PSU is a CoolerMaster 750W 80+ Bronze.
How old is the unit? Coolermaster is the brand of the unit, while 750W is the advertised wattage of the unit and 80+ bronze is the advertised 80+ efficiency rating of the unit what is the model of the unit?

MasterWatt 750, should be exactly 5 years since I bought it.

 

[Aevee_]

does anyone know if the MasterWatt 750 should be compatible with RTX 4070-S?
also, I think my PCI-E cables are 8 pin to 6+2. do those work with the nvidia 12vhpwr connector?