In accordance with a report by Igor Wallossek from Igor’s Lab, (opens in new tab) the included quad 8-pin-to-16-pin adapter with the GeForce RTX 4090 is hackable to permit 600W of energy consumption from simply three 8-pin PCIe energy connectors. This harmful configuration is just not that troublesome and solely requires shortening two tiny wires. For apparent causes, we don’t advocate you do this in your adapter, but it surely’s value figuring out if somebody reverse-engineers this hack right into a sellable product on-line.
Nvidia’s energy adapter is far more than only a power-splitting system. It is also an clever adapter that detects which of the 4 8-pin energy plugs are lively. It permits the top person to run simply three supplementary energy connections to the adapter to make the cardboard work – however at a decrease 450W TDP. With all 4 plugs linked, the GPU can entry 600W if the ability supply system permits it.
Nvidia’s energy adapter does this by relaying which energy plugs are getting used, on to the graphics card through 4 tiny wires that include the 12VHPWR energy connector. Two of the 4 wires are lively, and inform the GPU whether or not or not it is protected as well up the graphics card – relying on what number of 8-pin energy plugs are linked.
However, curiously, Wallossek found out that connecting simply the secondary two-pin plug on a 6+2-pin PCIe energy connector can trick the adapter into pondering the plug is lively. It is going to trick the adapter into pondering all 4 plugs are lively and activate all the 600W energy finances. To analyze additional, Wallossek seemed on the particular person wires and located that you are able to do the identical factor by shorting the 2 sensory wires that inform the GPU which energy plugs are lively.
It’s hazardous, can result in full-blown system failures, and pose a hearth hazard from the ability adapter as a result of wires overheating the plastic plugs. So be sure to both plug three or 4 PCIe plugs with all eight pins linked – straight into the adapter.
As for the sensory wire hack, that is much more necessary to notice, since this hack can create a triple 8-pin energy adapter for the GeForce RTX 4090 as an alternative of a quadruple 8-pin adapter – however with the complete 600W energy restrict lively. If you happen to ever see a tool like this in the marketplace, keep away from it in any respect prices.