I'm building my first PC and will be using an RTX 5080. I'm a bit anxious about the 12V 2x6 cable potentially melting. Is there anything I can do to prevent this? Are power supplies with built-in sensors worth the extra cost? I'm considering a PSU that's around 1200W+, but I want to make sure it's both good quality and affordable. Any suggestions or advice would be appreciated!
5 Answers
Just to ease your mind, those cables are typically rated for 600W, so they won’t melt under normal conditions. However, transient spikes can be an issue. I've read about the 5090 drawing up to 575 watts, and while that shouldn't theoretically cause melting, those spikes can be tricky.
Make sure the cable is fully seated, with no colors visible that could indicate it's not connected properly. Also, avoid any sharp bends after it leaves the GPU. If you're looking into power connection solutions, that could definitely be a worthwhile investment.
Using a high-quality PSU is crucial! Check out a PSU tier list before you buy. For wattage, I think a 1000W to 1200W PSU is perfect for your needs. The RTX 5080 pulls a max of 360W, which is well within the limits of those cables, so you should be fine.
I'd recommend getting an ATX 3.1 PSU that comes with a native 12VHPWR cable. Melting connectors often happen due to poor load balancing, and ATX 3.1 helps to avoid that. Just make sure you don't use any adapters and that the connector is plugged in correctly; that really minimizes the chances of a meltdown.
I actually put a thermal pad over the connector of my GPU and noticed a nice drop in temp—around 5°C. Since heat can be an issue, keeping it cooler should help prevent any potential issues down the line. If you're concerned about melting, monitoring the temp can definitely help.
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