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NVIDIA RTX 50 SERIES - Technical/General Discussion

I also don’t understand why they didn’t go with 2 of these new cables / connectors for these cards… :confused: - seems needless.

Something is clearly going wrong in that Derbaur vid but it’s not clear what.

I mentioned previous but there IS an updated version of that cable available from Moddify, which specifically says it’s pcie 5.1 compliant.

Everyone says these H+ and H++ cables are the same… but are they?? :confused:
 
On the melted cable issue see here from the cable maker:

help.moddiy.com

Can I use the existing 12VHPWR cable with the new RTX50 GPU?

Upgrade to the Latest 12V-2X6 Cables for RTX50 Series GPUs
help.moddiy.com help.moddiy.com

We are pleased to announce the release of our new 12V-2X6 cables, designed specifically for the recently launched RTX50 series GPUs. As of 2025, the industry standard has transitioned to 12V-2X6, replacing the previous 12VHPWR standard. Our new cables incorporate significant advancements, including enhanced terminal and connector housing materials, along with thicker wires, to provide an additional safety buffer for the latest GPUs.

At MODDIY, all 12VHPWR / 12V-2X6 cables purchased from 2025 onward are manufactured in accordance with the new 12V-2X6 specifications and standards, ensuring compatibility and optimal performance with the RTX50 series GPUs.

Prior to 2024, the RTX50 series GPUs had not yet been introduced, and the prevailing standard was 12VHPWR. All cables produced before this period were designed and tested for use with the RTX40 series GPUs.

We recommend that all users upgrade to the new 12V-2X6 cables to take full advantage of the enhanced safety and performance features offered by this new standard.
Click to expand...

The melted cable was the ‘old’ one.

What’s not clear to ANYONE at this point is what these differences actually are, since everyone seems to think it’s just the connector that has changed.
 
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Nitefly said:
I also don’t understand why they didn’t go with 2 of these new cables / connectors for these cards… :confused: - seems needless.

Something is clearly going wrong in that Derbaur vid but it’s not clear what.

I mentioned previous but there IS an updated version of that cable available from Moddify, which specifically says it’s pcie 5.1 compliant.

Everyone says these H+ and H++ cables are the same… but are they?? :confused:
Click to expand...
Would seem to make sense using two cables on a card as expensive/high-end as the 5090, but doing so would nullify the main reason nV introduced 12VHPWR -- to reduce component costs and deisng complexity/increase margins.

Someone needs to to a teardown and micro analysis on thje "new" and "old" cable. I suspect there is a difference, likely in the connector tolerences.
 
Grim5 said:
Not good guys, rtx5090 full load and the GPU side connector is hitting 90c and the PSU side connector is hitting 120+ degrees

Rtx5090 cards should have two power connectors; one is not enough headroom and it is playing with fire, literally
Click to expand...

I've just watched that video and the question I've only just seen asked in the comments is why all the current is going down those two wires? And not being distributed across all the current wires.
 
harmattan said:
Would seem to make sense using two cables on a card as expensive/high-end as the 5090, but doing so would nullify the main reason nV introduced 12VHPWR -- to reduce component costs and deisng complexity/increase margins.

Someone needs to to a teardown and micro analysis on thje "new" and "old" cable. I suspect there is a difference, likely in the connector tolerences.
Click to expand...

Good point re: reasons behind the cable.

Until they clear up what the issue is, I’m probably going to stick with the adaptor cable that comes with the card… unless the manual for the card expressly states “use the native H++ cable that comes with your PSU”.

Actually, having a look right now at what MSI are saying on their 5090 Suprim download links page, they are still saying use the ‘old’ native cable :rolleyes:

 
Absolutely Clueless said:
Should be fine. Just make sure you only use Seasonic cables (and the 12vhpwr to 4x8-pin adapter if needed). Do not bother with third party cables like the person on reddit did. It's just asking for trouble imo.
Click to expand...
Its not just 3rd party cables, they will all melt one way or another .... I've seen every single type of cable melted including the Nvidia supplied octopus connector and they were seated correctly . Its a terrible idea to just have one fitted to the 5090 , they should have 2 but not one card released with 2 connectors .
 
Varys said:
I've got this Seasonic Focus GX-1000 ATX 3.1 1000W 80 Gold Modular Power Supply but it's the ATX3.0 (not 3.1) version

Will it be safe with a 5090 ?
Click to expand...

Personally I’d make sure you have one of their H++ (12V-2X6) cables… and I wouldn’t use a native H+ connector on the PSU.

If your PSU doesn’t have a native H++ connector, it does look like you can get a H++ cable that splits into two 8 pin connectors. This one:

3PWbV0K.jpeg


Or, I’d just use the adaptor that comes with the GPU.
 
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Varys said:
I've got this Seasonic Focus GX-1000 ATX 3.1 1000W 80 Gold Modular Power Supply but it's the ATX3.0 (not 3.1) version

Will it be safe with a 5090 ?
Click to expand...

If it helps, my son has a 4090 FE - he had a 3rd party connector melt. Nvidia replaced the whole card on RMA as they acknowledged the old style connector was a design flaw. I then bought my son the Seasonic cable and he's had no issues. The cable is extremely well made, you can see and feel it.

We've consistently monitored the temp and checked the cable etc and no problems so far.

I know the 5090 draws more power (which is why I chose to skip this generation for ourselves), so not exactly the same. Hopefully the industry figures out a better solution soon...
 
Absolutely Clueless said:
Should be fine. Just make sure you only use Seasonic cables (and the 12vhpwr to 4x8-pin adapter if needed). Do not bother with third party cables like the person on reddit did. It's just asking for trouble imo.
Click to expand...

Until they have confirmed what the deal is with the melting cables, I wouldn’t use an old H+ connector (on the PSU, or a H+ cable) with a 50 series card.

The 50 series are H++.

For some reason, a card has melted using an H+ connector.

That’s enough for me to steer clear until we’re told wtf is going on.
 
Jay-G25 said:
The 12VHPWR and 12V-2x6 cables are identical , the difference is in the female plug that goes on the GPU and PSU sides ....


ive-made-some-infographics-about-12v-2x6-and-12vhpwr-power-v0-a8a11ktqqt5e1.webp
Click to expand...

That’s an infographic from Corsair and their marketing team which may be a gross simplification. Everyone that says they are the same can’t seem to provide a more reliable source that this.

Indeed, the manufacturer of the cable that has melted has said there are differences, as per my post above.

All I can say from my personal experience is that trying to get marketing to understand something technical is maddening :p

Hopefully, it is the same - and in support of that, Seasonic’s marketing materials also seem to highlight that it’s the connector that’s changed.
 
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easyrider said:
Roughly how much faster will a 5060 ti be over a 3060 ti?
Click to expand...

The RTX4070 was the true replacement of the RTX3060TI. The RTX4060TI we got was not even 20% faster. It's quite possible the RTX5060TI will be slower than an RX4070! The RTX5070 looks like it will barely match an RTX4070 Super.

I have an RTX3060TI myself BTW.
 
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Nitefly said:
Indeed, the manufacturer of the cable that has melted has said there are differences, as per my post above.
Click to expand...
You could argue that they've probably done that to sell more cables though :p

You could probably pull up the PCI-SIG docs and have a look at them if you want a definitive answer, but from what I've seen the cable hasn't changed.
 
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