16AWG cables into 18AWG cable extensions? - Overclock.net - An Overclocking Community

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16AWG cables into 18AWG cable extensions?

 
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post #1 of 7 (permalink) Old 06-28-2019, 06:58 AM - Thread Starter
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16AWG cables into 18AWG cable extensions?

Hi, I bought a Corsair SF 750, and after that I ordered my custom cable extensions (30cm) of 18AWG I discovered that Corsair stock cables are 16AWG.
So... Will be a problem connecting 16AWG cables to 18AWG extension cables?

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post #2 of 7 (permalink) Old 06-28-2019, 08:33 AM
*cough* Stock *cough*
 
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This depends on how much power you are drawing.

Higher current requires larger cables.

Corsair picked 16 for a reason.

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post #3 of 7 (permalink) Old 06-28-2019, 08:50 AM - Thread Starter
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Quote: Originally Posted by Nukemaster View Post
This depends on how much power you are drawing.

Higher current requires larger cables.

Corsair picked 16 for a reason.
Yes this is what I thought. The stock pcie cable are 1 to 2 splitted 6+2 and in this way is easy to handle a sli o 2x6+2 for each gpu.
I will use just a single 2080 and separated 6+2, without using the splitter.

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post #4 of 7 (permalink) Old 06-28-2019, 09:38 AM
*cough* Stock *cough*
 
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If I trust this website. Others tend to agree as well.
https://www.powerstream.com/Wire_Size.htm

For chassis wiring, 16awg is good for 22A and 18awg is good for 16A. How much voltage loss depends greatly on cable length as well.

Normally you will have 3 x 12 volt wires coming to an 8 pin connector.
A 12 volt connector is good for 150 watts(video cards may draw more at peak).
150/12=12.5A

You should be more than OK with 3 wires to bring 12.5 amps total. The advantage of more wires or larger wires is less voltage loss.

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post #5 of 7 (permalink) Old 06-28-2019, 09:51 AM
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If you happen to run anything that takes even slightly more current and power, due to heat transfer your 18AWG might cause your more grief then it's worth. You might be OK but In my humble opinion I would stick with 16WAG, It's not worth the risk of melting your cables and taking other things with it.

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post #6 of 7 (permalink) Old 06-28-2019, 10:34 AM
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16AWG is larger than 18AWG (just making sure peops realize that).

I have experience with Corsair's Premium PSU Cable Kit (in red and black - looks nice), and I had terrible experience with those. They look great and feel great but can't take the heat.

I have literally melted 4 sets of cables, and only found out that those were the culprit after troubleshooting everything else. I also had issues with some coloured extension cables on another PC - same overclock.

Now for context I Overclock an 18-core 7980XE and push it to near 400-500W (not really supposed to), and most of my headaches came from the GPU power cables while overclocking 4x ASUS Strix 1080Ti OC's to above 2050Mhz - those created problems within weeks. Screen jams, black screens, PC freezes, you name it ... found the "charred" (burned) cables and replaced them by some PRO CableMods and so far so good - CableMod pro cables are true 16AWG - I asked them if they would build me some 14AWG's and they refused saying it would be out of specs (understandable).

Makes me wonder how those LN2 overclockers get these processors up to 7.2Ghz and still push power through ??? Makes no sense to me yet. What cables do they use ??? Beats me.

And I held a few world records myself on 3dmark for ages - 10'th last i checked on timespy extreme hall of fame, right above Der8auer :-) (look up Excesseve).

My 2 cents.
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post #7 of 7 (permalink) Old 06-28-2019, 10:42 AM
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I recently went from a cheap set of Antec 18AWG extensions to a better looking 16AWG extension set.

Didn't have any issues with either, just the 18AWG set looked pretty bad since they didn't fit my cable combs correctly and were impossible to train.

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