Is this okay for the 4090 power connections? 2 coming off each cable, or do I have to run 4 single power cables? I’m paranoid lol TYIA!
Is this okay for the 4090 power connections? 2 coming off each cable, or do I have to run 4 single power cables? I’m paranoid lol TYIA!
40 Comments
Its not okay.
No
If you have 3 cables that’s preferable, but for a decent PSU it’s probably fine.
It’s technically fine, the sockets themselves are rated to 150w each where the manufacturers of the power supplies include cables that can carry more power.
The science says it ok, but there’s plenty of people (myself included) who have experienced instability using pigtailed pci power cables like this.
With how fragile these 12vhpwr ports are I’d recommend getting a proper corsair cable like this, I have one it’s a much neater and safer option, mine is a nice braided white one that corsair make
https://www.corsair.com/uk/en/p/pc-components-accessories/cp-8920284/600w-pcie-5-0-12vhpwr-type-4-psu-power-cable-cp-8920284
Just do it, the constant examples of poorly wired 4090s being fried are surely all just anecdotal.
So you’re wondering if you can use the pigtail?
https://knowledge.seasonic.com/article/8-installation-remark-for-high-power-consumption-graphics-cards
The **recommended** way to power a GPU over 225W is with an individual power cable per connector, but it should be okay to use the pigtail if the card isn’t under heavy load.
For 30-series Founders Edition cards with the 12-pin adapter you will need a separate cable per 8-pin connection, this is listed as a requirement, not a recommendation. This doesn’t change for the 40-series.
* Make sure that 12VHPWR connector is fully plugged into the GPU. Really. It’s also supposed to be easier to connect the adapter before installing the card.
The reasoning has a few facets: using fewer cables means the cables carry more load making them run hotter, which increases resistance, which makes the cable hotter and the PSU work a little more. A sustained loading could expose any flaws in construction.
Not all PSU cables are made equal, those with thinner wires won’t handle heavy loads as well as those made with heavier gauge wire.
I don’t know if anyone has done more the GamersNexus on transient spikes yet, but it seemed that some of the recommendations from PSU and GPU makers to use more cables is to mitigate some of the issues related to transient spikes causing the PSU protections tripping.
MSI has something similar: https://www.msi.com/blog/we-suggest-80-plus-gold-1000w-and-above-psus-for-nvidia-geforce-rtx-3090-Ti
But being focused on a 3090 Ti kind of puts a dent in the appeal.
[ThermalTake](https://i.imgur.com/lelbjsX.png) has a version that’s hidden in a PDF, which is similar to the earlier version of what Seasonic had.
[Silverstone](https://www.silverstonetek.com/en/tech-talk/wh_pcie-connection) seems to say they won’t cover warranty if an issue arises from using a pigtail on a power hungry card. They include [their power cable suggestion graphic](https://www.silverstonetek.com/upload/images/tech/WB21-GRA/PCIe%20connections.jpg).
If it was my 4090 I’m running four individual cables for it
Appreciate it guys, I’m running 1 cable per connector now
3 or 4 separate ones. Don’t daisy-chain if you can help it.
100% ok, same number of cables from the psu as with native 12vhpwr cables
for anyone downvoting you don’t know how things work, same number of cable is same number of cables.
Nothing about those 12 pin connectors is ok. Lol
My PSU came with 3 single cables and 3 double cables.
I’m using 3 single cables and the first connector of a double cable.
Most here are going to repeat that no, its not ok. The truth of the matter is if that’s a high quality PSU model with good 16AWG cables, yeah its probably more than fine.
The majority of these scene has people who don’t really understand this stuff just blindly repeating that all daisy chaining is bad.
Its just not, when done right.
Personally, I would use separate cables. Especially for the 4090. (my opinion)
The RM1000e should come with a 12VHPWR cable. I’d use that instead.
No!
Edit: what is your PSU ? if it’s a quality one it should be alright because they use thicker copper, if it’s a cheap one i wouldn’t risk it because they maybe used thinner copper that could run hot
use at least 3 different cables, pcie cables (Edit: connectors not cables, sorry for that) are recommended for 150w and the rtx 4090 uses usually 400-450w at stock, the motherboard itself power the gpu for 75w
I would suggest 4 single better safe then sorry
I still don’t understand why people buy 4080 and 4090 FE with that stupid connection that literally melts.
edit: I have been briefed about it, obviously I didn’t know melting connector added up to the performance and is a must. Wow PC parts really changed a lot. Hope Intel brings melting connectors to Battlemage.
A very bad idea.
No, it’s not
It might work ok if those are some really good cables. But honestly, if it was me I would not be daisy chaining like that for a 4090.
That looks like a RM1000e, you can buy a 12VHPWR connector from Corsair that slots into two 8 pins on the PSU, and you don’t have to resort to… that.
From what I remember you need at least 3 seperate ones to run the card at stock speeds. If you want to set the power limit higher, you have to connect the 4th one as well.
I use the 12v cable from Corsair. They say its rated 300w per connection so 600w in total
I have the 1600w power supply so no issues here. Well not yet al least….
It’s my understanding that each cable will be rated for at least 280w or higher so check your psu and how much the card draws and make your own call
Tbh I know manuals say what to do and bot to do, I ran separate plugs to each.
Please make sure the cable is fully inserted. I’ve seen too many people’s 4090s melt because the cable wasn’t fully inserted. Make sure you hear a click when plugging it in.
The correct answer is use as many separate feeds and avoid feeds chaining. If one of those feeds fails or comes loose, you have a safety net knowing the other feeds are not being over drawn.
The hysteria around this is hilarious.
You can absolutely daisy chain a reputable PSU in this way.
Two cables split to four pcie connectors is safe with all but the most dreadful of power supplies.
Any reputable unit, from say, Corsair, Seasonic, Flower etc will absolutely manage 450w, even up to 600w, from two cables.
Would I run say a 300w PSU from one cable pigtailed, probably not.
But a 450w from two cables is absolutely fine, and I can find you numerous posts on r/Corsair for example where their well respected Reddit support staff say as much.
People will tell you you need single cables for each, but consider this;
* Corsair **only** use the Minifit HCS connectors for their 8-pin PCIe cables, not the standard Minifit Jr. (HCS = High Current System, they can handle more current).
* They also aren’t in the habit of selling PSUs that explode or catch fire.
* What’s the fucking point of having daisy chain connectors/cables if you can’t use them?
* A single 8-pin HCS connector can safely handle far more than the 150W that PCI-SIG state in the PCIe spec. PCI-SIG do not make the connectors, Molex do. Molex rate them for far more than what PCI-SIG state in the PCIe spec.
If you ***can*** use single cables, then I think you should. It’ll reduce the current through each pin, and that’s only a good thing.
If you ***can’t*** use single cables or simply don’t want to, then this is fine too. Literally no bad will come from it, beyond PCMR users screaming at you.
It depends on the quality of the power supply. For example, on Seasonic units, their proprietary 12pin connector only connects to two ports on the PSU, so using 4 connectors off 2 ports would be fine. But if it’s at all in question, best to use all 4.
I’m hoping the 50 series is more reliable. I won’t buy one this gen and am sad sticking around my 3090. Was going to buy one but until the murder your family and burn your house down plug gets less dodgy I’m out till then.
No, you need a psu with a native connector.
Each of those plugs needs their own psu connector. Minimum of 3. The 4th is for overclocking I think. Cuz 3 gives the card 100% power to run.
I used 3 until my cablemod cable came in, two would be fine though especially at 450w
Mine is daisy chained and has been fine for 10 months now. Take that for what it is.
Any high end PC I build, I make sure it has two PSU’s.
It’s amazing that people have the money to splurge on a 4090, but don’t have money for a good power supply….
Well you’ll get 150W per pcie psu run and 75W from the mobo pcie slot ( maybe 100W pending mobo).
A 4090 TBP is 450W, but likely transient spikes to 500W.
500W – 75= 425W
425W/150= 2.83.
So a minimum of three 8 pin runs from the psu.