>10% 5090 могут скоро выйти из строя.

I ran the numbers, and 8auer is right: the RTX 5090 is a ticking time bomb.
[spoiler=ENG]These are the results of some simulations I did on the 12VHPWR connector for the RTX 5090, based on the Amphenol datasheet.
They rely on these estimates and assumptions:

The mean contact resistance of a pin is 10 mΩ. This is higher than the manufacturing specification of 5 mΩ, but the datasheet allows up to 5 mΩ of additional resistance drift for various reasons, such as thermal aging and repeated plugging/unplugging. It's important to note that these are lab results—in actual GPU use, connectors will experience significant thermal cycling.

The mean wire resistance is 3.1 mΩ, based on 30 cm of 16 AWG copper wire.

Manufacturing tolerances (the natural variation in production quality) follow a normal distribution (bell curve).

The resistance variation (standard deviation) is 25% of the average. This variation is the most important factor in the analysis, but it's hard to measure precisely without detailed data from the manufacturer. While this estimate might be a bit on the pessimistic side, it’s still realistic. Plus, as the connector ages, the resistance differences between pins will likely get even worse.


The GPU draws 50A (600W at 12V) entirely through the 12VHPWR connector (ignoring power supplied through the PCIe slot).

Simulation Methodology:

Using these assumptions, I randomly generate resistance values for the connector and wires, then calculate:

Maximum current per wire

Power lost (heat dissipation) at the most loaded pin

Total power lost across the entire connector

I run this simulation 10,000 times and track the average and maximum values for these three parameters.

Optimistic Case (Standard deviation 10% of the average, contact resistance = 5 mΩ)

Results over 10000 simulations:

Maximum pin power. Mean: 0.444 W Max: 0.632 W

Total connector power. Mean: 4.292 W Max: 4.943 W

Maximum wire current. Mean: 9.147 A Max: 10.666 A

11.110% of connnectors have at least one pin overloaded.

Pessimistic case (Standard deviation 25% of the average, contact resistance = 10 mΩ):

Results over 10000 simulations:

Maximum pin power. Mean: 1.307 W Max: 4.244 W

Total connector power. Mean: 9.037 W Max: 13.303 W

Maximum wire current. Mean: 10.804 A Max: 19.539 A

95.690% of connnectors have at least one pin overloaded.

Independent tests by JayzTwoCents, The 8auer, and Hardwareluxx.de suggest that the pessimistic case is closer to reality. This means that most RTX 5090 connectors are already overloading their power pins—and this issue will only worsen over time.

NVIDIA is relying on extremely tight manufacturing tolerances to prevent serious overheating. In my opinion, this is a fundamentally flawed design, especially for a high-end product costing thousands of dollars.

While we haven't seen GPUs catching fire en masse yet, the lack of safety margin is alarming. Over time, connector wear and aging will increase failure risks, making this design entirely inappropriate for such an expensive piece of hardware.

TL;DR:

Right now, between 10% and 95% of RTX 5090s are overloading their power connectors. This problem will only get worse as connectors and GPU's age. How did such a risky design make it into a multi thousand dollar product from a company worth $3400 Billon?