Check if using two PCIe cables (Dual 6+2) on a temporary basis is safe for the RTX 5070 Ti 3 × 8-pin adapter.
Check if using two PCIe cables (Dual 6+2) on a temporary basis is safe for the RTX 5070 Ti 3 × 8-pin adapter.
Hi everyone 👋,
I recently upgraded to a
PNY RTX 5070 Ti (16GB)
, which uses a
3×8-pin to 12VHPWR adapter
.
My PSU is a
Corsair HX750 (750W, fully modular)
.
Right now, I
only have two PCIe cables
, each with
dual 6+2 connectors
.
A
third PCIe cable
is on the way, but meanwhile, I’m considering this setup:
Cable 1
→ Two 6+2 connectors → GPU adapter
(8-pin #1 & #2)
Cable 2
→ One 6+2 connector → GPU adapter
(8-pin #3)
Is this safe temporarily until the third cable arrives?
avoid using split cables, it's not safe.
https://www.zotac.com/de/news/50-series-...wer-safety
are you receiving the third cable from Corsair or another source? Check that the cables match your exact model and are compatible closely.
Just to confirm — if you have two PCIe cables with each having two 6+2 connectors, that’s likely the reason they’re warning against connecting them that way, since it’s not safe.
Find a PCIe cable on Amazon that matches your needs since Type 5 is unavailable locally.
I suspect in your case it will be fine. When you look at the power requirements for a 5070 and what 6+2 cables can provide you technically only need 2 but you are right at the limit.
The actual answer depends on the details of how the wires are built. You have 2 things you worry about the amount of power the 6+2 jack itself can provide and the wires that are connected to it. What they do in when they put 2 6+2 ends on the cables is the wire are thicker. So you can buy 2 separate cables with thinner wire or you can buy 1 cable with thicker wire both can carry the same amount of current. That is a somewhat over simplified version but as long as the cables come from a respected company their engineers have made sure the cables will work properly.
I bought the ASUS Prime 850W Gold power supply. They mentioned it comes with a native 16-pin cable, just like the one in the 5070 Ti, which means I'll require fewer PCIe cables overall.
Here, let me adjust your question for you.
Question -
"Is it safe to use [bunch of extra words] the 12VHPWR?"
Answer -No
😀
In reality, it's likely acceptable.
Ensure all links are firmly attached and perhaps, from time to time inspect them (don't remove, just look for heat marks or smell). The main point is that the 12VHPWR and 12V-2x6 connectors are less reliable than the previous 8-pin type. This situation will definitely not happen. Still, a non-modified 5070 doesn't supply enough power to damage connections.