I guess ASRock failed to estimate AMD fans hate for this connector, I will grant. It's borderline irrational. Case in point: this thread.
I don't think it has anything to do with AMD fans. It's already been annoying equally-vocal Nvidia fans for two years.
The resistance against it comes from two main points -
- people feel they need to buy a new PSU or dedicated PSU>12v2x6 cables because adapters have a poor safety record and they're butt-ugly.
- there have been too many examples of cables melting or burning in situations where the user did absolutely nothing wrong; stock GPUs with first-party, genuine cables.
The naysayers will cite examples of old 8-pin cables melting too and that's fair, but almost all of those 8-pin examples are things like mining rigs overloading adapters, overclocks, or faulty GPUs pulling way more than they should. Also, the number of reports of melting 8-pins is far lower per year or per product - remember how much noise there was about melting 12VHPWR in 2022 and 2023? Google has far more results for "12VHPWR melting" than 8-pin cables already, and 8-pin cables have had 16 more years on the market to fail and generate results. Again, most of the "8-pin melting" results are miners abusing cables and adapters, not ordinary people with a single GPU in a PC.
My take on it, as someone with a degree that covered physics and electronics to a decent standard - is that the new connectors are being rated to draw much more power than the older cables. The technical drawings and manufacturer specs on pin contact surfaces from both Molex and Amphenol confirm that each pin has slightly
less contact area than the older 8-pin MiniFit Jr. Then you have a claimed rating of 8.3A per wire-pair going through that newer, smaller pin, with less contact area compared to 4.2A per wire pair in a 150W 8-pin connector.
So we have a new connector that (ignoring fanboy loyalty) simply puts twice as much juice through an even smaller connector than we're used to. It's a problem that isn't going away because the basic laws of electricity aren't changing any time soon.
Is the safety-margin on the old 8-pin cable too high? Maybe it is. I can't prove that, but it is
very rare that the cable has been blamed for melting or fires. It just seems dumb to reduce the current-carrying capacity of the connector by making it smaller and giving it smaller contact patches, and then double the current running through it as well. IMO the 12V2x6 connector should be rated for 300W with its existing Amphenol/MicroFit connector size. That's still less safe than 8-pin as it's about 1.4x more current per square millimetre of pin contact, but if we assume that 8-pin is overbuilt,
it's reasonable. 450W cables are about 2.6x more current-per-area than 8-pin and 600W cables are about 3.5x more current-per-area. To me, and probably to all the people whose GPUs have been burned, that's too big a jump and it's eaten too much of the safety margin that was built into the MiniFit Jr we've been successfully using with minimal drama for almost two decades.
There's nothing
physically wrong with the new connector. The
problem is the power rating applied to it; it's not a 600W connector. If they downrated it to 300W that would likely shut up all the complainers. Sure, perhaps the 5090 will need two of them, but having multiple connectors on a GPU isn't exactly a new or outrageous idea, and the first ever GPU series to use the older he PCIe connector (the 8800-series) launched with dual 6-pin connectors right out of the gate!