The NVIDIA RTX 5090 still has 12V-2×6 connection worries, and now there's a hardware fix that could come in handy if you're anxious about those cables melting. The quad 8-pin bypass mod will let you skip all of that and power your graphics card directly through four regular 8-pin connections. This might be something worth looking into if you're really invested in the safety of your cable management, or if you've got an older power supply without the new connection type. It lets you bypass the proprietary interface that has been causing problems in some setups.
Hardware mod splits power across four connectors to eliminate melting risks
The adapter is the work of modder DallasGrave. It splits the power to the RTX 5090 through four separate 8-pin connections. It connects to those pins using the back contact of the 12V-2×6 connection, essentially skipping past the port itself.
Specifications
- Power Delivery Method: Quad 8-pin connector mod bypassing 12V-2×6
- Max Tested Power: 800W
- Sense Pin Configuration: 600W
- Power Balancing: Automatic if conductor and trace lengths are identical
He's inspired by his own dual 8-pin 12V-2×6 graphics card adapter. All in the name of relieving some of the heat on the cable.
The quad 8-pin mod is configured for the sense pins to manage up to 600W. But DallasGrave notes that they've had success with shunt modding the card and pushing the power up to 800W. It'll automatically manage everything to evenly balance the power to the four connections as long as the trace and conductor are all the same length for all of the pins. That means you don't have to mess with balancing the load during installation.
The new design makes a serious difference in wire temperature, according to DallasGrave. The way the power gets distributed through this is a lot more efficient. So you're taking the 12V-2×6 connection out of the equation.
Still, it's hard to say if this is going to completely end melting issues because we just don't have enough data on that front. (We've been following the RTX 5090 quite a bit, even giving you a look at a DLSS 5 mod that gets Gears of War at high frame rates. But this is all about the power delivery mechanics via hardware modification.)
The quad 8-pin mod is a tangible alternative for anyone who wants to address the 12V-2×6 risks without having to swap out the whole power supply. DallasGrave tested up to 800W. So it does seem like it could handle the max power needs of the GPU.
Under certain circumstances. Just make sure you're checking your cable quality and pin lengths before you make this hardware modification.
Source: TweakTown
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