Will undervolting a 4090 keep the connector from melting? A discussion about electrical theory.

[AusWolf]

undervolting will keep the connector from melting.

1. As long as your tuning software doesn't accidentally forget to load your UV profile.
2. It shouldn't be necessary. Every product should work right out of the box as intended.

 

[Toss]

* or just not buying it.

-- Good Summary



Nvidia still has not made a single statement or a real 8D-Report so we know the real issue. they just sit the issue out. The warranty period runs out and the products are sold.



What are you calculating? Check my post above and try again.

So you say the resistance is 33 Ohms? Serious? And you divide it two times, although i took my efforts to write the formula above with units.

these are the basics from school any 12 year or younger knows about

Always - always use number plus comma plus number plus technical unit with mathematical operator with number plus comma plus number plus technical unit ...... equal sigh with number plus comma plus number plus technical unit

Amperes
I am dividing power losses on connectors from 1st and 2nd scenario to find how much more heat it produces between them

 

[phanbuey]

2. It shouldn't be necessary. Every product should work right out of the box as intended.

100% agree, unfortunately not the reality in this case.

 

[AusWolf]

100% agree, unfortunately not the reality in this case.

Therefore, it's not a product that should be sold for any price. It should be recalled and the issue rectified.

 

[chrcoluk]

The problem is that undervolting doesn’t necessarily mean the GPU will draw any less power, but rather it will try to boost even more freely, which could mean even more spikes. You have to limit the power to reduce the risk, otherwise these cards are designed to overclock (ie boost) themselves based on available power and temperature budget, and they do so in milliseconds.

If these cards didn’t have a boost clock, then you’d have something going for you. What I’ve done with my 6700xt was lower the power limit and the voltage, and the card actually runs at boost speeds almost all the time, while using less energy.

A proper curve needs to be done so the card will still top out only at a specific clock, you are right if this isnt done, then yeah it can just mean higher clocks with same power consumption, but it can be done if a proper curve is done. One could then also after testing to see what the new power usage data is, set a lower power limit as well for insurance.

I am adding my rtx 3080 FE and 4080 super FE notes here for the curious.