Question Missing PCIe Cables for Antec TPQ-850 — Upgrading to RTX 3070

[Sam1981s]

I have an Antec TruePower Quattro 850W (TPQ-850). At the time of purchase, some of the modular cables were missing. Specifically, the two modular PCIe ports labeled 12V3 (Y/B) and 12V4 (Y/G) don’t have their cables.

I've been running a GTX 960, which only needs one 6+2 pin PCIe connector, so it hasn't been a problem until now. I'm planning to upgrade to an RTX 3070, which requires 2 x 8-pin PCIe connectors.

During cable management, I routed and hid all the extra cables behind the case, so I'm trying to avoid tearing it all apart unless necessary.

My question is:

• Does the TPQ-850 originally come with 2 x 6+2 pin PCIe cables?
• If not, is it safe to use a generic 6-pin male to 6+2-pin male PCIe cable (16 or 18 AWG) to power the second 8-pin connector on the 3070? Which Red port should I use 12v3 or 12v4?

I've attached a photo of the modular ports in question. Would appreciate any advice on compatible cables or safe alternatives.

P.S. I'm located in a region where ordering Antec original cables will not be possible. So the generic ones are my only option (IF the PSU doesn't originally provide 2 x 6+2 pin.

 

[Lutfij]

Welcome to the forums, newcomer!

I have an Antec TruePower Quattro 850W (TPQ-850)
That PSU was released in 2006/2007. That shouldn't be in use in 2025 with concurrent hardware.

I've been running a GTX 960, which only needs one 6+2 pin PCIe connector, so it hasn't been a problem until now. I'm planning to upgrade to an RTX 3070, which requires 2 x 8-pin PCIe connectors.
You should pick up a new PSU, one that's reliably built and ~1KW at your entire system's disposal. The RTX 3000 series were notorious for having high transient load spikes.

 

[Eximo]

Unless you are interested in making your own cables, I wouldn't even consider it. I can't imagine anyone has cables in stock for that.

I definitely wouldn't keep using that PSU and particularly not with a higher wattage load. Looks to be multi-rail as well, which hasn't been normal for a long time.

A good 750W unit is probably fine, and they are somewhat reasonably priced. Would need a country and currency to give a more specific answer.

 

[Sam1981s]

A good 750W unit is probably fine, and they are somewhat reasonably priced. Would need a country and currency to give a more specific answer.

You should pick up a new PSU, one that's reliably built and ~1KW at your entire system's disposal. The RTX 3000 series were notorious for having high transient load spikes.

Thank you both. I never thought if it is still running, i should still stop using it to avoid a possible disaster. I did some research, these are available options for me in my budget. I am in Pakistan and PKR is the currency here.

MSI MAG A750GL PCIE5 (750 W)
XPG Core Reactor II 850 W

I could even go for MSI MAG A850GL, but I'm not planning to do any (excessive) overclocking of the CPU/GPU. I am currently running i5 6600K with Asus Maximus VIII Hero (I know about 3070/3080 bottleneck concerns). And will possibly upgrade to a modern CPU + Mobo in 3-4 year's time.

 

[Eximo]

Both PSUs are good choices. XPG Core Reactor II is very good.