Seasonic PSU Brand Confirms 12-Pin Micro-Fit 3.0 Power Connector for NVIDIA RTX 30 Founders Edition GPUs

It seems that previous rumors about power supply requirements for Ampere GPUs were indeed true. There had previously been discussions on the web that NVIDIA’s upcoming RTX 30-series Ampere gaming GPUs might use a new 12-pin power connector interface. Industry sources at TweakTown have also confirmed that only reference RTX 30 Founders Edition GPUs can use this new 12-pin PCI-E power interface.

Now, a major power supply manufacturer SEASONIC has released photos of this 12-pin Molex PCIe power connector adapter. A power connector was shown on Chinese media portal Bilibili, and it appears to be a dual 8-pin to single 12-pin power cable with a length of 75cm/750mm. This leak goes through HXL @9550proand the image shows a box containing the NVIDIA 12-pin PCIe Molex Micro-Fit 3.0 connector.

We expect Nvidia to ship its own adapter with the Founders Edition cards. The cable packaging says “NVIDIA 12 pin PCIe Molex Micro-Fit 3.0 connector”. Seasonic claims it is currently being used for internal testing. More importantly, Seasonic posted 850W or more of power for use with the 12-pin connector cable, which means the Ampere Founders Edition GPUs are going to draw a lot of power.

High-end/flagship NVIDIA GeForce RTX 30 series graphics cards may have only one 12-pin connector assuming they draw power from 2 x 8-pin PCI connectors, which will place the maximum power of approximately 300 W (i.e. 150 Watt per 8 -pin connector). The PCIe slot itself provides 75W of power to the graphics card. It is also important to note that this cable will only work with Seasonic power supplies, not other power supply models from various OEMs.

But we don’t know how Seasonic and other PSU manufacturers will supply these adapters. Of course, newer models of PSUs will be bundled with this adapter, but users already using existing PSUs may need to purchase them separately, unless of course Nvidia ships those cables with the Founders Edition graphics cards.

As mentioned earlier, the 12-pin connector is actively used by NVIDIA for internal testing and GPU vendors/manufacturers are unlikely to ship these adapters themselves. This is because the specs of 12-pin adapters are different and must correctly match each OEM/manufacturer’s PSU specs differently. Therefore, they can only be supplied by a specific PSU vendor, be it Seasonic, BE Quiet, Antec. , Corsair, Cooler Master, FSP, EVGA, to name a few.

We’ve seen power consumption figures over 300 Watts on some of the Ampere boards before. AIB partners will likely have their own custom GeForce RTX 30 GPUs powered by multiple 6/8-pin PCIe power connectors, while Founders Edition cards will have this new 12-pin PCIe power connector interface. The 12-pin 12V connector resembles the Molex Micro-Fit series of power connectors which are 19mm wide and have a 3mm pitch. It’s the same width as two 6-pin power connectors that current power supplies offer, but has a current rating of 8.5 A, compared to the 6 A rating of mini-Fit 5556 connectors. You’d assume the mini-fit would deliver 600 watts of power, but that’s not always the case since the actual power delivered to the GPU is around 400W at 6 amps.

The 20AWG specification for pins seems to be a major bottleneck with traditional connectors. This new design change may be specific to NVIDIA’s “Founders Edition” reference Ampere SKUs, while AIBs may still ship their custom designs with traditional mini-fit power connectors. If you are currently swinging a high quality Tier PSU, then there should be no problem using two 6-pin PCI/PEG connectors. Most reputable high-end power supplies come with multiple 6-pin and 8-pin PCI-e connectors.

The new 12-pin connector looks like 2 x 6-pin PCIe power connectors mixed together, which offer 8.5A current versus 6A current. This 12-pin interface may already be used in some applications today. today. Molex makes interfaces for everything, not just power supplies. It’s just that this interface might be used in some power supplies for the first time. Molex has a similar connector with the same width as pin 6+2 but with more pins. It’s called ‘Micro-Fit 3.0 socket box, double row with 12 circuits’. More details here.

The 12 pin connector appears to be real. The connector appears to be the brains of NVIDIA, not that of another IP or commercial group, such as PCI-SIG, Molex or Intel. The connector was designed in response to two market realities, namely that high-end graphics cards inevitably need two power connectors; and it would be more consumer-friendly to have one cable than to struggle with two; and that low-end graphics cards (

As for power delivery, we’ve learned that designers will also specify cable gauge, and with the right combination of wire gauge and pinouts, the connector should be capable of delivering 600 watts of power (that’s not so not 2*75W=150W), not 6 pin scaling. Looking at the keying, we see that it will not be possible to connect two classic six-pins to it. For example, pin 1 is square on PCIe 6-pin, but on NVIDIA’s 12-pin it has a slanted corner. It also won’t be possible to use weird combinations like 8-pin + 4-pin EPS, or the like, because NVIDIA made sure people couldn’t connect their cables the wrong way around.

As for connector proliferation, in addition to PSU manufacturers releasing new generations of products with 12-pin connectors, most top-tier manufacturers are expected to release aftermarket modular cables that can plug into their existing power supplies. It will be interesting to see how power supply manufacturers react to this. Maybe they will sell “12-pin modular” cables for some power supplies as an add-on? Intel already released the 12VXO power specification standard in May 2020 and I believe a manufacturer has already demonstrated a 12v unit at the CES2020 event. Nvidia is hosting a special Geforce event on September 1, and we expect the company to announce the next-gen Ampere Gaming GPUs.

Stay tuned for more!

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