Oh God it better not be tilted towers

Ramaswamy has youth and beauty on his side; that alone will probably get him farther than Christie.

“You have been permabanned from: lemmy.ml, hexbear, lemmygrad…”

That’s not saying much about New Jersey tbh

The 12VHPWR specification in ATX3.0 was meant to simplify connections for ever-higher power PCIe devices. Instead of chaining multiple 6 or 8 pin connectors together, it provides a single 12pin connector (6 power, 6 ground) with 4 additional tag-along “sense pins” that allow the cable to communicate the power rating of itself and the power supply to the connected device. In theory it’s sound engineering; allows only a single connector to run devices anywhere from 75W up to it’s stated max of 600W.

The key is that the 12VHPWR spec really pushes the wire and connectors much closer to their safe limit in order to improve packaging and wire flexibility. For example, the old PCIe 8-pin spec officially only provides three 12V hot pins, each with one wire- the entire connector is rated for 150W, which means that each pin/wire is carrying only 50W, or 4.2 amps at 12V.

Comparing this to the 12VHPWR spec, there are 6 +12V and 6 ground pins/wires, meaning when running at it’s max spec of 600W, each pin is carrying 100W, or 8.3 amps at 12V! This is DOUBLE the 8-pin per-pin spec, so we’re already flying close to the sun on single 16gauge wires.

where the problem arises: the electrical connection between the male and female plugs in the 12VHPWR standard is mechanically flawed and can sometimes have too much resistance due to poor fit tolerances and slop in the clip/insertion guides. And by too much, I mean only a fraction of an ohm caused by a pin being 0.1mm undersized is enough to cause failure, especially when being run so close to it’s design limits. When paired specifically with the RTX4090, which pulls 450W or more depending on OC settings, despite the plug supposedly being rated for 600W at 12V, this slightly high resistance causes a big heat buildup in the connecting pins and it melts the plastic connector housing. Melted plastic is Very Bad, it can start fires and damage/destroy the GPU.

CableMod was providing adapters that were meant to relieve the stress on the connector itself caused by trying to bend the wire around side panels, which theoretically would help with the poor contact melting problem. but due to manufacturing tolerances and existing flaws in the 12VHPWR spec they were also causing their own melting problems. Really, it’s not even cablemods fault… but they got themselves stuck in the middle of it by choosing to make products for this segment.

yeah, it’s a sloppy standard with a lot of variance allowed for how close to electrical limits they were trying to run it… and the mechanical execution in manufacturing was clearly corner cut.

procrastinators win once again!

How much riker would a riker rike if a riker could rike rikers?

of course, you’re welcome!

So, sounds like we need to graduate to bolt-on connectors or thicker wires. Maybe a mini breaker panel. h/j

the wires wouldn’t really help, since it’s the connector pins themselves that are causing the resistance bump. But yes, why they chose to go to an even SMALLER pin spec while doubling the amperage is baffling. But yeah, bolt on or even some more traditional larger spade connectors would indeed have made this connection so much better…

time to dump that friend post-haste
what a shitbag!