will my PSU 12vhpw lead be enough for the 5090?

Threepwood

Threepwood

Threepwood

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as per the title, will my

ROG Thor 1000W Platinum II be okay with a 5090​

the 12vhpw lead is rated for 600W​

​

here is asus's own compatibility list so it definitely works with some 5090s, just dunno how much stress they put them under, that's all​

I'm saving for a 5090, but I'd rather not have to buy another PSU, and have to get the whole computer rebuilt to accommodate, just looking ahead.​

 
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lots searching says this:
Yes, one native 12V-2x6 connector from an ROG Thor 1000W Platinum II PSU should be enough for an RTX 5090, as long as it's fully inserted, since the connector can provide 600W of power and the GPU has a TDP of 575W. However, for high-end components like the 5090 and a power-hungry CPU, a 1200W PSU is recommended for system stability, efficiency, and managing power spikes.
But does TDP even work directly compared to a rated lead like that??
 
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I'm not sure what you're asking exactly here?

There's only two types of connector for the 16 pin, the 12v-2x6 and the old 12vHPWR.

The maximum rating for this connector is 600 watts, but that's the same for any of them (it is a design/engineering limitation, not per PSU).

In other words: you can't get any better, it has to work.

In reference to a 1000 watt PSU, that shouldn't be a problem, a lot of 5090s are being run on 1000. There's no way I'd buy a new PSU on the off-chance that it won't be enough.
 
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Tetras said:
I'm not sure what you're asking exactly here?
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oh, I was confused. When I ask Google "is 12vhpwer lead enough for the 5090" it says:

No, a single 12VHPWR (or the improved 12V-2x6) connector is not enough for the RTX 5090, which can draw up to 575W, as it leaves no safety margin and risks overheating and melting. While the cable's standard allows for up to 600W, this is too close to the card's maximum power draw, and issues like wear, improper insertion, or poor airflow in tight cases can cause stress, leading to overheating and failure. For safe operation, you should use a power supply with a native connection and at least two 12V-2x6 connectors, or one of the updated native cables if available.
 
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Tetras said:
you can't get any better, it has to work.
Click to expand...
But like you say, even if google is saying that, it's not like there is anything better, I think I was thinking that a 12v2x6 was higher rated?, I don't have a 12v2x6, you see?
 
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Threepwood said:
For safe operation, you should use a power supply with a native connection and at least two 12V-2x6 connectors, or one of the updated native cables if available.
Click to expand...
You can't even fit 2x 16 pin connectors to a 5090, because it doesn't have 2x 16 pin connectors.

Threepwood said:
No, a single 12VHPWR (or the improved 12V-2x6) connector is not enough for the RTX 5090, which can draw up to 575W, as it leaves no safety margin and risks overheating and melting. While the cable's standard allows for up to 600W, this is too close to the card's maximum power draw, and issues like wear, improper insertion, or poor airflow in tight cases can cause stress, leading to overheating and failure.
Click to expand...
This part about safety, that's an opinion, I suspect based on the concerns of people like der8auer. That's obviously not an official opinion, or else nvidia wouldn't continue to fit these things to their cards.

If you're buying a 5090 then you don't have any choice anyway, since you can't get one with different power connectors. If you're concerned about the safety margin you can undervolt/power limit the card, but so far as nvidia are concerned, buy one and use it, the end.

Threepwood said:
I think I was thinking that a 12v2x6 was higher rated?, I don't have a 12v2x6, you see?
Click to expand...
12v2x6 and 12vHPWR are both the same (600 watts max). The 12v-2x6 has some improvements, but they're pin compatible. You can alternatively use the box adapter for PCI-E 8-pins.
 
Tetras said:
You can't even fit 2x 16 pin connectors to a 5090, because it doesn't have 2x 16 pin connectors.


This part about safety, that's an opinion, I suspect based on the concerns of people like der8auer. That's obviously not an official opinion, or else nvidia wouldn't continue to fit these things to their cards.

If you're buying a 5090 then you don't have any choice anyway, since you can't get one with different power connectors. If you're concerned about the safety margin you can undervolt/power limit the card, but so far as nvidia are concerned, buy one and use it, the end.


12v2x6 and 12vHPWR are both the same (600 watts max). The 12v-2x6 has some improvements, but they're pin compatible. You can alternatively use the box adapter for PCI-E 8-pins.
Click to expand...

There are about 7 versions of the 12vHP plugs and sockets. The safety issue is gauge of wire used and quality of crimp to the pin. Again there are many versions of male and female pins.

The whole situation is complicated mess. People should be rightly cautious and carefully research the gauge of wire and version of connector used on the card and PSU because there is no established 12vHP standard.
 
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