Someone in China has turned Nvidia’s GeForce RTX 3060 into a single-slot RTX 3060 that carries no 6-pin or 8-pin power connector at all, running the card entirely off the 75W a PCIe x16 slot can supply. The mod comes from Bilibili creator WestmereX, and the results are as grim as that sounds: clock speeds that barely clear half their rated boost, and a synthetic benchmark score that falls behind a GTX 1060.
Nvidia launched the RTX 3060 12GB in early 2021 with a 170W TDP as a mainstream gaming card, and reissued it two months ago to ease pressure during the ongoing component shortage. Neither release shipped anything resembling this configuration: no external power connectors, no full-height cooler, and a fraction of the heatsink a reference design carries. The mod surfaced on X on September 4, 2026, alongside WestmereX’s own teardown video on Bilibili, which is what exposed just how bare the cooler really is.
Inside the single-slot RTX 3060
The card is a blower-style, low-profile design about the size of a modern smartphone, with just one HDMI and one DisplayPort output. There’s no fin stack and no backplate; the shroud itself is a thin metal sheet doing most of the heat dissipation, with a rudimentary heatsink bolted on in the middle. A teardown found the memory chips have no thermal pads or paste at all. The metal shroud simply touches the core directly, and a single fan at the far end pushes hot air out the back, with nothing acting as an intake.
Getting the card down to 75W needed a shunt mod. A shunt resistor swap is normally used to unlock a GPU’s power limit for overclocking, by lowering resistance so the power sensor under-reports current draw and the card’s boost logic allows more through. This build does the opposite: raising resistance so the sensor over-reports draw, tricking the 3060 into capping itself at a fraction of what the silicon is rated for.
Clock speeds and benchmark scores collapse
Nvidia rates the RTX 3060’s boost clock at 1,777MHz; this build barely creeps past 900MHz. In TechPowerUp’s Time Spy testing, it posted just 4,821 points, against roughly 9,000 for a standard RTX 3060, and behind older cards including the GTX 1060 and RX 580.
By our arithmetic, this is a cliff, not a slope
The RTX 3060 already tolerates a straightforward undervolt down to 100W with only modestly reduced performance, no shunt mod required. By our arithmetic, that’s already a 70% swing away from the 170W stock TDP, achieved purely through software.
The shunt-modded card pushes only another 25W lower, to the PCIe slot’s 75W ceiling, yet that comparatively small extra cut is what turns a usable budget GPU into one a GTX 1060 beats. Below 100W, the RTX 3060’s power curve looks less like a slope and more like a cliff. There’s no indication this is headed to retail: it reads as a proof-of-concept from a single Bilibili teardown, not a shipping product, and the case for going below the RTX 3060’s 100W undervolt sweet spot is not obvious from these numbers.
