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The RTX 5090 now costs EUR 1,830 more than it did a month ago (www.pricesquirrel.com)
submitted 1 week ago by to c/technology@lemmy.world
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[–] 3 points 1 week ago (8 children)

NGL you couldn't pay me to use the newer models after the 30 series. First of all, I don't touch anything developed with or alongside AI. Secondly I have heard the new power cables are fire hazards only rated for a dozen plugs and unplugs.

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  • [–] 5 points 1 week ago (4 children)

    FWIW, lots of power connectors are indeed only rated for a low number of mating cycles (only 30), not just 12VHPWR. This includes the old PCIe 8 pin (same 30 limit). Realistically you will probably not reach the rated limit.

    The actual problem, I think, is that the connector could operate without being fully plugged in, especially without current balancing on the side of the card. This is an actual fire hazard, as you now get at least some connections with very high resistance, forcing extreme current on the remaining wires with low resistance connections. This is combined with the fact that the safety margin on 12VHPWR is a lot lower than that of the PCIe 8 pin (which I believe can safely carry a lot more than its 150W rating).

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  • [–] 0 points 1 week ago* (3 children)

    I see you start off with a bit of devils advocacy before acknowledging the risks, but this is what happens with the 12VHPWR cables:

    image

    This is not normal. This is new.

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  • [–] 3 points 1 week ago

    Yeah, the connector spec is definitely bad given the incidents we've seen. I was just pointing out it's not actually the mating cycle limit that's the issue here (especially given older connectors like the 8 pin evidently don't have this problem, despite equivalent mating cycle ratings), but rather the rest of the spec.

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  • [–] 3 points 1 week ago (2 children)

    I'm pretty sure you're not supposed to unplug them at the end of each day!

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  • [–] -1 points 1 week ago (1 child)

    It's less about the practicality of anybody other than a repairman resocketing and/or unplugging gpus daily and more about the fact that it's of such measurably lower quality that resocketing and/or unplugging will permanently damage the device at some point.

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