Corsair RM850e ATX 3.1 with 3070Ti

[Delta3D]

Hey!

Doing a bit of an upgrade.

Current is 5800x3d with 3070ti, moving to 7800x3d with the same 3070ti, thought I'd upgrade my PSU as I'm only on a 650w Gold at the min, just to give me room to move to a 4080 next year.

Corsair RM850e RM850x (now looking at x series for better capacitors) peaked my interest as a good price for it being ATX 3.1 with 12vhpwr. What I'm not entirely sure of is, will I still be able to use my 3070 ti given that it has 12vhpwr? I assume yes since it should have original PCIe connections, but wanted to check first. Is 12vhpwr just 2x 8 pins that go into the 12vhpwr connector at the other end?

Thanks!

 

[Grimley]

I think it would help others & myself answer your question if you said what make your 3070Ti is.

 

[Delta3D]

I think it would help others & myself answer your question if you said what make your 3070Ti is.

It's an MSI VENTUS 3x, I thought it's only 40 series cards that utilise 12vhpwr so didn't think make was relevant! Uses 2x 8-pin.

I guess the question is more so that I'm not missing anything glaringly obvious that states I shouldn't be buying an ATX 3.1 gen PSU to use with a 30 series card that doesn't use 12vhpwr? I think it should be fine, but best to check, I mainly dabble in servers not PC's!

 

[Grimley]

It should be backwards compatible. I checked the specs. Corsair should have made sure of that. You should have 1 6+2 dual PCI-E & 1 6+2 single PCI-E connectors included, I'd check if I were you to make sure. I dunno the power draw of a 3070Ti, my gut feeling is that you use both connectors and not the dual connectors on its own.

 

[Delta3D]

It should be backwards compatible. I checked the specs. Corsair should have made sure of that. You should have 1 6+2 dual PCI-E & 1 6+2 single PCI-E connectors included, I'd check if I were you to make sure. I dunno the power draw of a 3070Ti, my gut feeling is that you use both connectors and not the dual connectors on its own.

Fab, appreciate it! Power draw is around 270W I think, so would just go with both just to make sure. I use a quiet case with no window anyhow so not too fussed about cable mess.

 

[Tetras]

What I'm not entirely sure of is, will I still be able to use my 3070 ti given that it has 12vhpwr? I assume yes since it should have original PCIe connections, but wanted to check first. Is 12vhpwr just 2x 8 pins that go into the 12vhpwr connector at the other end?

The 12VHWPR is a new connector (the updated version is known as: 12v2x6) which has 12 pins and 4 sense pins. It is used on nvidia cards from the 4070 Super onwards. Most 4070 and 4060 cards still use the old PCIE 8 pins.

All cards will come with an adapter that converts 2x, 3x or 4x PCIE 8 pins into the 12VHWPR. This means that you don't need a new ATX 3.x/PCIE5 PSU to use the new nvidia cards.

If you have a new ATX 3.x PSU and you want to use the old 8 pins, you're usually fine, BUT if you want more than 2 of them, some PSUs require you to use a reverse 12VHPWR adapter (converts 12VHPWR into 2x PCIE 8 pins). These reverse adapters I consider an abomination and would avoid using.

 

[Delta3D]

The 12VHWPR is a new connector (the updated version is known as: 12v2x6) which has 12 pins and 4 sense pins. It is used on nvidia cards from the 4070 Super onwards. Most 4070 and 4060 cards still use the old PCIE 8 pins.

All cards will come with an adapter that converts 2x, 3x or 4x PCIE 8 pins into the 12VHWPR. This means that you don't need a new ATX 3.x/PCIE5 PSU to use the new nvidia cards.

If you have a new ATX 3.x PSU and you want to use the old 8 pins, you're usually fine, BUT if you want more than 2 of them, some PSUs require you to use a reverse 12VHPWR adapter (converts 12VHPWR into 2x PCIE 8 pins). These reverse adapters I consider an abomination and would avoid using.

Good info, appreciate it! So basically no real need for ATX 3.x at the moment. I doubt I'll upgrade to 50 series, so should be solid with a 4080 Super or something around that mark. Thanks!

 

[Tetras]

So basically no real need for ATX 3.x at the moment.

In theory, they are supposed to better support the power spikes of modern GPUs, so compared to an old design that might (or might not) it says so on the box in big letters: "GPU GET BIG POWA", but I've never seen any comparison articles where they put this to the test, so I suspect that many (most?) older PSUs released recently (but without the labels) are just as effective.

A PSU with a native 12VHPWR connector does avoid using a messy adapter though, especially if your new card needs 3x or 4x 8-pins to make up one 12VHWPR.