Where can I have 14-AWG cables made for my PSU?

[GGeorge007]

I'm about to purchase a 1600W PSU from EVGA for my computer which will have 3 x 3080-Ti GPUs rated at 350W max each. I would like to know where I can buy 14ga wires for this power supply. I've not had any luck to date; on Google and DuckDuckGo I've seen a couple of sites that offer 16ga cables, but not 14ga.

Any help would be greatly appreciated!

 

[freakdiablo]

There's a decent chance 14awg cables won't fit in the connectors, which is why you can only find 16awg.

Why do you think you need 14awg? Most of those PCIe power cables are only a foot or two, and keep in mind the hot leads are spread over multiple stands.

 

[GGeorge007]

After reading several posts and articles about power supplies and the cable thickness for high end GPUs, all of which recommended 14-AWG for these needs, I want my cables to be capable of delivering the needed wattage without overheating. And to me, overheating a cable should be much less than the recommended 60॰C (140॰F).

 

[freakdiablo]

What model power supply are you using?

I doubt 16awg cables are hitting 60c, even with some 3080s being out of spec power draw wise. An 8 pin connector has 3 hot leads and "delivers" 150w. Let's say a card has two connectors, and breaks spec pulling 180w on each. That's 60w on each strand, [email protected] I'll be really, REALLY surprised if individual 16awg cables are hitting 60c on a 5a draw.

 

[GGeorge007]

I guess you can't read... so I'll repeat myself.

I mentioned in my FIRST post, in the FIRST sentence, that I am about to purchase a 1600W PSU from EVGA. I'll add (which I did not mention before) that it will be the Titanium 80+ build, part no. 220-T2-1600-X1.

An EVGA 3080-Ti, part no. 12G-P5-3967-KR, is stated on the EVGA website having a power draw of 350 W (that is the maximum rated for this card). A typical motherboard supplies 75W in the PCIe slots, and PSU manufacturers "typically" supply "up to" 150W per cable to the GPU. The 3080-Ti has three 8-pin connectors which all add up to a total of 525W.

I do not expect the cables to reach the 60॰C. I do expect that the lower temps will allow the amount of voltage loss due to a "voltage droop" to be less. That is my end goal. I don't want any voltage droop if I can avoid it.

So... I'll repeat myself again: Where can I have 14-AWG cables made for my PSU?

 

[EarthDog]

Easy, George...we all miss things sometimes.....

I'm sorry I can't answer your question directly. But I do have one myself, if that's OK...

I don't want any voltage droop if I can avoid it.

Is this for extreme overclocking purposes? Otherwise, I think you're looking into it too deep. I ran a 3080Ti with a single 750W unit in the same manner (three 8-pin PCIe). Zero issues even while overclocking. I don't have three, but, your PSU shouldn't 'droop' for much of any reason...

anyway... hopefully someone can help you, but just trying to get the whole story.

 

[GGeorge007]

Easy, George...we all miss things sometimes.....

I'm sorry I can't answer your question directly. But I do have one myself, if that's OK...


Is this for extreme overclocking purposes? Otherwise, I think you're looking into it too deep. I ran a 3080Ti with a single 750W unit in the same manner (three 8-pin PCIe). Zero issues even while overclocking. I don't have three, but, your PSU shouldn't 'droop' for much of any reason...

anyway... hopefully someone can help you, but just trying to get the whole story.

Hello EarthDog. Yes, I agree, I shouldn't have jumped at him so hard... but it's over now.

Yes, I am an extreme overclocker. I am not a gamer, but I do participate in BOINC. There is a member that writes some high end overclocking programs for some of us and he does it very well. But, I digress.

What I do not want is for my OC'd GPU's to "droop" voltage because I'm running them at the limits of 350W, which by some standards is "okay" to droop a little bit. If at all possible I don't want to droop at all, or as little as possible.

 

[Max0r]

Out of all the random PC/monitor power cables I have, two are 14 AWG. So I use those for my systems of course. They have the usual connections though, while it looks like that extreme PSU has a different style.. I believe you're looking for one of these?

StarTech.com 6 ft Heavy Duty 14 AWG Computer Power Cord NEMA 5 15P to C19 - Office Depot

pThis NEMA 5 15P to C19 power cord features 14 AWG wire thats suitable for high power connections making it perfect for high end server equipment such as routers switches Power Distribution Units PDU etc. pPlus you can use the cable to extend the reach of your existing power cord by 6 feet...

www.officedepot.com

14 AWG NEMA 5-15P Male to IEC 60320 C19 Female is the thing to look for. I wonder if they come in 12/3 style too? XDDDDDDDDDDD




It's always nice to learn something new. I never knew about any of this crap.


But yea, my 14 AWG cables are C13/C14 or whatever

Oh, by the way to the forum George. Jeez... I must have been around here 80,000 years. I should have remembered to do that by now.

You're not related to this guy, by any chance, are ya?

 

[EarthDog]

What I do not want is for my OC'd GPU's to "droop" voltage because I'm running them at the limits of 350W, which by some standards is "okay" to droop a little bit. If at all possible I don't want to droop at all, or as little as possible.

What, exactly, do you believe droops? And what is the result of that? I really don't think you're going to have this 'droop' you're looking for? A power supply comes properly equipped (power and PCIe cables) to put out at least what the PCIe-SIG spec is for those cables (150W+ for 8-pin, AWG of the power cord is complementary too, of course). If the cards have 3x 8-pins, that's 450W (525W as you said above with the slot) and well in spec for a 350W card. Nothing is going to get warm and it isn't worth the hunt or effort unless you're modding the BIOS etc to go over the meager power limit increases too?

And, you're looking for better 8-pin PCIe cables, right? Not power cable?

 

[Max0r]

Oh wow, that's for PCIe PSU cables? Damn that's hardcore. I should have known. But that's just how out of touch I am. Looks like I'm learning even more now.

And I definately agree with the concept of overprovisioning when it comes to extreme overclocking on cables. I bet running thicker and shorter wires would help avoid drooping voltages. But I've already made enough of a fool of myself in this thread. But the good news is that means I'm learning even faster!

Fail fast, fail first. That's my motto.

 

[EarthDog]

 

[GGeorge007]

And, you're looking for better 8-pin PCIe cables, right? Not power cable?

Yes, the 8-pin PCIe cables from PSU to GPU, not the A/C power cable from wall to the PSU.

 

[EarthDog]

While you wait for someone to respond who may know, I'd consider reaching out to EVGA and see if they can help you with better cables.

I still don't understand the goal (I suppose I don't have to, but to best help...........). Consider that extreme overclockers (who use sub-ambient cooling methods) don't change their cables around and pump cables just like that full (and perhaps then some) of the 150W rating. If they don't do it to break records where literally every MHz counts, I don't think it's going to make a darn bit O difference with ambient cooling and some tweaks.

That said, if you care to explain more, I'm all ears. We're all here to learn...

 

[Arctucas]

Been a lurker for a while, this post caught my eye.

OP, why do you believe you need 14AWG conductors on the PCI-E cables?