PSU recommendation for RTX 5090

[Carsomyr]

I found a good deal on the Super Flower Leadex VII XG 1300W Power Supply, ATX 3.1 Compatible.

Should I pull the trigger or should I aim higher?
For PSUs Like the Seasonic PRIME TX-1600 Noctua Edition?

Aside from the fact that the super flower doesn't have braided cables... Are there other major issues to consider?

 

[dgianstefani]

Either are fine, though if you're plugging the 5090 into your current system I'd suggest spending the money on something faster instead of a more overkill PSU, the 1200 W you already have is enough.

 

[ir_cow]

^ exactly. Don't overspend. Get what your max wattage is plus 30% overhead. 3.1 Spec is a good idea for the RTX 5090, those power spikes are nothing to sneeze at.

Check out cybernetics, TPU or hardwareBusters PSU reviews for a breakdown. You may find 1200w is all you need.

 

[Kwadratowicz]

atx 3.1 is "lower" standard than 3.0. It's confusing, but mostly the manufacturers says that it is 3.0 compliant for example "LEADEX VII XG is fully compatible with Intel ATX 3.0 / ATX 3.1 Specifications, "

LEADEX VII XG 1300W ATX3.0 / ATX3.1 (BK) | SUPER FLOWER

Please contact the distributor in your country for the availability and quotation

www.super-flower.com.tw

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I've got Super Flower Leadex VII Gold 1000W (SF-1000F14XG) and I'm happy with cables, I like how I can make them almost flat , I did not like the sleeved cables from Seasonic in my focus gold 550W.

 

[Carsomyr]

Either are fine, though if you're plugging the 5090 into your current system I'd suggest spending the money on something faster instead of a more overkill PSU, the 1200 W you already have is enough.

I forgot to mention im also upgrading the rest of my system.

My current psu is pretty much C tier when it comes to reliability/fluctuations/pc stability... That's why I'm considering dumping it. Also it doesn't have fully modular cables. Another reason why I'm thinking of changing it... I've got a lot of components and my current psu is tricky when it comes to hooking up everything. Also my current psu doesn't have atx 3.0 or 3.1 either.

As for the rest of my upgrades. I got really good deals on a core ultra 7 265k and Asus Maximus hero z890 motherboard so I grabbed those. Got myself a ddr5 7600mhz kit as well. So yeah, I'm now at the point where I'm shopping for a gpu upgrade and psu upgrade potentially (for convenience and overclocking ease)

 

[Frizz]

My 9950X3D with full watercooling system with 15x fans, screen, overclocked ram cpu gpu cant even reach 1100w at full load. Most ive seen is 1060-1070watts with both prime95 and furmark running. 1200w is more than enough however it also doesnt hurt changing to plat/titanium its a 5090 afterall.

 

[oxrufiioxo]

The ledex is probably fine it just doesn't actually have a native 12VHPWR connector.


I used this on a 285k/5090 build for a customer and it seemed really solid and has plenty of headroom, Not sure your location though.

https://www.amazon.com/NZXT-Platinum-Low-Noise-Connectors-Capacitors/dp/B0D1VDZST3?th=1

I'm sure the 1200w variant is also more than adequate.

My 9950X3D with full watercooling system with 15x fans, screen, overclocked ram cpu gpu cant even reach 1100w at full load. Most ive seen is 1060-1070watts with both prime95 and furmark running. 1200w is more than enough however it also doesnt hurt changing to plat/titanium its a 5090 afterall.

Same 285k/5090 was around 1100w fully stressed 10 Phanteks T30s. Speedway and CB2024.

 

[Carsomyr]

The ledex is probably fine it just doesn't actually have a native 12VHPWR connector.


I used this on a 285k/5090 build for a customer and it seemed really solid and has plenty of headroom, Not sure your location though.

https://www.amazon.com/NZXT-Platinum-Low-Noise-Connectors-Capacitors/dp/B0D1VDZST3?th=1

I'm sure the 1200w variant is also more than adequate.



Same 285k/5090 was around 1100w fully stressed 10 Phanteks T30s. Speedway and CB2024.

yeah but I keep hearing about those transient power spikes from the rtx 5090
you're saying it never happened to you?

 

[oxrufiioxo]

yeah but I keep hearing about those transient power spikes from the rtx 5090
you're saying it never happened to you?

You can't actually measure those without specialty equipment but atx 3.0/3.1 are supposed to have headroom for that. If you're midly worried that C1500 gives you a ton of headroom.

I've seen reports of 900w transients for 1ms. I still think a quality 1200w+ should be fine but with a 5090 1300-1500w isn't a terrible idea.

GeForce RTX 5090 Power Excursions Tested: Can Spike to 901W Under 1ms

Igor's Lab conducted an in-depth analysis of the power management system of the new NVIDIA GeForce RTX 5090 graphics card, including the way the card draws peak power within the tolerances of the ATX 3.1 specification. This analysis should prove particularly useful for those still on older ATX...

www.techpowerup.com

 

[Dr. Dro]

I found a good deal on the Super Flower Leadex VII XG 1300W Power Supply, ATX 3.1 Compatible.

Should I pull the trigger or should I aim higher?
For PSUs Like the Seasonic PRIME TX-1600 Noctua Edition?

Aside from the fact that the super flower doesn't have braided cables... Are there other major issues to consider?

Both are great, but you should be safe with the Super Flower. They make quality products and are very trustworthy. I use an EVGA 1300 G2 which is a 1st generation Leadex design, both of these power supplies are good - but the 1300 W capacity is also the smallest I would purchase to use with a 5090.

atx 3.1 is "lower" standard than 3.0. It's confusing, but mostly the manufacturers says that it is 3.0 compliant for example "LEADEX VII XG is fully compatible with Intel ATX 3.0 / ATX 3.1 Specifications, "

LEADEX VII XG 1300W ATX3.0 / ATX3.1 (BK) | SUPER FLOWER

Please contact the distributor in your country for the availability and quotation

www.super-flower.com.tw

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Super Flower Leadex VII Gold 1300W (SF-1300F14XG) PSU Review - Hardware Busters

Hardware Busters - Super Flower Leadex VII Gold 1300W (SF-1300F14XG) PSU Review - PSUs

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I've got Super Flower Leadex VII Gold 1000W (SF-1000F14XG) and I'm happy with cables, I like how I can make them almost flat , I did not like the sleeved cables from Seasonic in my focus gold 550W.

My power supply is an ATX 2.3 model, it works just fine with my 5090. ATX 3.0 and 3.1 are pretty much identical, the 3.x power supplies are just supposed to withstand a nominal overload (refer to table below) without shutting down, this allows it to handle GPU power excursions, a high capacity ATX 2.x supply will also manage to do this as long as it's within its specification.

The differences between 12VHPWR (type H+) and the revised 12V-2x6 (type H++) is just how the pins are connected and their relative depth, they are also interchangeable and an H++ cable will work on an H+ socket and vice versa. H++ are supposed to be safer due to improved manufacturing tolerances.

 

[Space Lynx]

I found a good deal on the Super Flower Leadex VII XG 1300W Power Supply, ATX 3.1 Compatible.

Should I pull the trigger or should I aim higher?
For PSUs Like the Seasonic PRIME TX-1600 Noctua Edition?

Aside from the fact that the super flower doesn't have braided cables... Are there other major issues to consider?

I recommend the Montech (Seasonic made) $229 and very well reviewed on a few websites

Montech Titan PLA 1200W High-End ATX Gaming Power Supply - 80 Plus Platinum & Cybenetics Platinum - Fully Modular - ATX 3.1 & PCIe 5.1 Ready -10 Years Coverage - White​

 

[inquisitor1]

this one should be just enough and its gold rated

 

[Carsomyr]

decided to opt for the "Super Flower Leadex VII XG 1300W Gold Power Supply, ATX 3.1"
The price for the quality makes sense to me.

 

[Carsomyr]

Question:

Just received my PSU. Its supposed to be atx 3.1
But the box says atx 3.0 and pcie 5.0
Instead of atx 3.1 and pcie 5.1

Its odd because the Newegg product page and the official product page both say atx 3.1 too...

LEADEX VII XG 1300W ATX3.0 / ATX3.1 (WH) | SUPER FLOWER

Please contact the distributor in your country for the availability and quotation

www.super-flower.com.tw

 

[oxrufiioxo]

Could be wrong but I think 3.0 is more stringent than 3.1 with the hold up time being longer on 3.0

The only other major difference is if it has a native 12Vhpwr connecter which I don't believe yours does it's one of those dual 8 pin to 12V-2x6 at least you'd hope and not the original 12VHPWR connector.

I believe those are the only real differences.

Either way nothing to worry about it's a fantastic power supply. Just make sure it is the new 12V-2x6 on the gpu side and you are golden.

 

[lambda]

Question:

Just received my PSU. Its supposed to be atx 3.1
But the box says atx 3.0 and pcie 5.0
Instead of atx 3.1 and pcie 5.1

Its odd because the Newegg product page and the official product page both say atx 3.1 too...

LEADEX VII XG 1300W ATX3.0 / ATX3.1 (WH) | SUPER FLOWER

Please contact the distributor in your country for the availability and quotation

www.super-flower.com.tw

The webpage says "ATX 3.1 Compatible, Pcie 5.1 ready"

Seems like some sort of lying by omission (certified vs compatible) or more likely, you've received a slightly older unit.

I had a similar issue with Cooler Master V850w SFX, there are 4 revisions of this PSU and it's Russian roulette which one you'll receive.

Cooler Master V850 SFX Gold 850W Full-Modular 80 Plus Gold SFX Power Supply

The V SFX Gold delivers the high quality experience you've come to expect from the V series in SFX form factor. Enjoy the same great features with 80 Plus Gold efficiency, full-modular cabling, an FDB fan, 16AWG PCIe high efficiency cables, and a 10 year warranty. But now you can have it in a...

www.coolermaster.com

 

[Carsomyr]

Yeah it's weird. I checked the provided cable and took pictures. I don't like that it's 16ga (cable) and rated for 80c. What do you think? Right now I'm debating whether I should return it and get something else. If I can't trust the product page item description on Newegg... How can I be sure I'm buying the right psu?!

 

[lambda]

Pasting this here for your reference - https://www.corsair.com/us/en/explo...-units/atx-30-vs-atx-31-whats-the-difference/

I'd probably get the newer unit if I can, just because.

 

[Carsomyr]

Honestly at this point I'm thoroughly confused as to which PSUs are safe to use with an rtx 5090 and which cables are safe too. The internet is full of contradictions and nobody seems to know for sure. I can even order an atx 3.1 psu and receive a box that says atx 3.0.....

Yikes

 

[dgianstefani]

Yeah it's weird. I checked the provided cable and took pictures. I don't like that it's 16ga (cable) and rated for 80c. What do you think? Right now I'm debating whether I should return it and get something else. If I can't trust the product page item description on Newegg... How can I be sure I'm buying the right psu?!

16awg is fine, many PSUs even have 18 awg which is also fine.

 

[lambda]

Honestly at this point I'm thoroughly confused as to which PSUs are safe to use with an rtx 5090 and which cables are safe too. The internet is full of contradictions and nobody seems to know for sure. I can even order an atx 3.1 psu and receive a box that says atx 3.0.....

Yikes

The cables are the same, the connector is different or that's my understanding of the situation.

The Corsair article I shared above says the same from a cursory read.

 

[oxrufiioxo]

As long as it's the new 12V-2X6 on the gpu side it's fine which it should be anyone with a 5090 should have a wireview pro anyways imho personality I wouldn't take any chances lol.

Or get the astral which has per pin monitoring I believe which makes you use their trash software but better than nothing.


I think I'm confused because some older cables were blamed for 5090s going up in flames

 

[dgianstefani]

As long as it's the new 12V-2X6 on the gpu side it's fine which it should be anyone with a 5090 should have a wireview pro anyways imho personality I wouldn't take any chances lol.


I think I'm confused because some older cables were blamed for 5090s going up in flames

Aftermarket cables.

 

[oxrufiioxo]

Aftermarket cables.

I still think anyone in the market for a 5090 should either get an astral which at least has per pin in software monitoring that you can see or a wireview pro just my honestly opinion.

 

[dgianstefani]

I still think anyone in the market for a 5090 should either get an astral which at least has per pin in software monitoring that you can see or a wireview pro just my honestly opinion.

To me it's a non issue statistically, but a wireview is cool just for the live readout.