RTX 3090 - PCIe slot power limit. Possibly going OoS

[MagnuTron]

Hey guys

So right now my theory is that the RTX 3090 might be going OoS on the PCIe slots...? I haven't used GPU-Z to check power draw from slots, but it just seems very strange that even for a dual card setup, the 6 pin was needed...

The client running dual 3090 STRIX @ ASRock TRX40 Creator is using a Xilence Gold 1250W
The client running 3090 and 2080 Ti @ ASRock X570 Extreme4 is using a Xilence Gold 1050W
The quad 3090 build I did, was running dual 1200W PSUs. It is stable.

I do have 2 more builds coming up soon with quad 3090, and I will be using Super Flower 2000W for them.

UPDATE 17-02-2021: The dual 3090 STRIX machine is still crashing even though we added the motherboard 6pin. So right now I have to do some checking on the cards, because the crashing started when GPU2 was added - the card could be a defect. So right now my entire theory is kinda in the way. Besides the fact that the X570 board running 3090+2080Ti doesnt work - and is now only running the 3090.

Discuss!?

 

[Caring1]

Sounds more like their PSUs aren't up to the task.
They need to go large.

 

[dark2099]

I agree with Caring1, what are the PSU specs for all the rigs?

 

[newtekie1]

Honestly, running any more than 1 high power card off just the power provided by the 24-pin connector is asking for trouble. Trust me, I've seen the nasty results. The 24-pin just wasn't designed to provide more than 75w of power to the PCI-E bus.

It is why products like this exist: https://www.amazon.com/EVGA-Power-Booster-Black-100-MB-PB01-BR/dp/B005OTXUYU

 

[jboydgolfer]

Hey guys

So I have built 1 single machine with quad RTX 3090, based on a TRX40 Creator board, which has a 6 pin power connection for extra juice for the slots. Usually these things are needed for 3+ cards, so in this case it was completely fine.

But I just had a client running dual 3090 Strix cards, and it would crash before we threw in the 6 pin power cable to the mobo. I also have another client running a 3090 and a 2080 Ti, but his machine crashes too. Sadly his board does not have the posibility of adding a 6 pin power cable for the PCIe slots, so he is kinda screwed.

So right now my theory is that the RTX 3090 might be going OoS on the PCIe slots...? I haven't used GPU-Z to check power draw from slots, but it just seems very strange that even for a dual card setup, the 6 pin was needed...

Discuss!?

i think the 3090's are drawing WAY more peak power than is being disclosed. both of my 3090's have caused full PSU shutdown, on a 750Watt Seasonic Focus+. its a solid PSU, & based on specifications of the 3090, more than capable of powering it, yet here i am. i monitored GPUz PCIe wattage & didnt see anything out of the ordinary, but i think it is slow for real time monitoring. So many users have reported crashing, with different PSU brands & OEM's, that i feel it cant be a PSU issue, i think the 3090 peaks high & is overwhelming PSU's that should otherwise drive the 3090. i feel liek it might be the capacitors in the PCIe cables not handling the load, but im no expert, i just know many have reported critical shotdown when running 3090's on what should be acceptable PSU's

 

[arbiter]

Honestly, running any more than 1 high power card off just the power provided by the 24-pin connector is asking for trouble. Trust me, I've seen the nasty results. The 24-pin just wasn't designed to provide more than 75w of power to the PCI-E bus.

It is why products like this exist: https://www.amazon.com/EVGA-Power-Booster-Black-100-MB-PB01-BR/dp/B005OTXUYU

Spec says 75 watts but generally they can do more then that. Problem is when you are dealing with cheaper boards that might skimp on tracing so that 75 watts ends up being absolute max. Usually higher ends boards can do 75 problem and even a bit more. Nvidia hasn't been known to go above spec on and only ones that ever would are ones that are sole relying on pcie for all its power but generally they rely more on extra power connectors 6/8pin. AMD on other hand they had cards in history that drew more then they should be from pcie slot which did cause issues which they had to fix with updates i think to the cards bios to make it draw from the 6pin over pcie slot.

 

[thesmokingman]

If what the Op suggests were true, many many more of us would have come across this issue, which doesn't exist. These are 400w gpus, ya better have the psu to run them.

 

[quanash]

What is your PSU? For TRX40 platform + quad RTX 3090, you really need dual PSU or single 2000 WATT PSU.

QUAD Gigabyte RTX 3090 TURBO and Intel Xeon W-2255 CPU ( 165 WATT TDP ) pulls 1717 WATT from the wall at peak usage.

I have measured 1375 WATT power draw from wall when stressing 2 RTX 3090 with F@H ( 10850K@5.2 GHz all core with EK-QuantumX Delta TEC CPU block that has a 200 WATT peltier and it was on. ). I have 2000 WATT PSU and motherboard has 6pin PCI-ex power plug as well.

 

[LiveOrDie]

These issues are power supply related try replacing the PSU with another unit, I had to replace my 1200w ROG PSU which worked fine with my 2080TI but would crash using my EVGA 3080, and no the PSU had no issues these cards cause some hard power spikes which trip out some units.

 

[kayjay010101]

These issues are power supply related try replacing the PSU with another unit, I had to replace my 1200w ROG PSU which worked fine with my 2080TI but would crash using my EVGA 3080, and no the PSU had no issues these cards cause some hard power spikes which trip out some units.

If that 1200W is triggered by a 3080, it's sh**. I run a power-modded watercooled 3090 off a 1000W Corsair unit and never had an issue...

 

[MagnuTron]

Alright. I will post specs here and in OP:

The client running dual 3090 STRIX is using a Xilence Gold 1250W
The client running 3090 and 2080 Ti @ X570 board is running a Xilence Gold 1050W
The quad 3090 build I did, was running dual 1200W PSUs.

I do have 2 more builds coming up soon with quad 3090, and I will be using Super Flower 2000W for them.


Update on the situation though: The dual 3090 STRIX machine is still crashing even though we added the motherboard 6pin. So right now I have to do some checking on the cards, because the crashing started when GPU2 was added - the card could be a defect. So right now my entire theory is kinda in the way. Besides the fact that the X570 board running 3090+2080Ti doesnt work - and is now only running the 3090.

 

[W1zzard]

In my testing, the 3090 FE spikes to 465 W

 

[MagnuTron]

In my testing, the 3090 FE spikes to 465 W

But that is just absolutely insane. Shouldn't it be something that newer drivers and/or BIOS updates can adjust? It's just a spike.

 

[londiste]

In my testing, the 3090 FE spikes to 465 W

What is the measurement period/frequency?

edit:

It says in the image, 40 samples per second.

And I am blind

25ms spike that high is pretty concerning.

 

[kayjay010101]

What is the measurement period/frequency?

It says in the image, 40 samples per second.

 

[jboydgolfer]

In my testing, the 3090 FE spikes to 465 W

that spike right there, full resets my PC. no error message or warning. im guessing it is trigger Over Voltage Protection, of some kind. I have a Seasonic Focus+ Gold 750W, but that is not sufficient for these spikes in wattage. Im hoping the Focus+ 1000W Will be enough

 

[W1zzard]

no error message or warning

that's expected when something is triggered on the PSU, because the PSU has no way to report back to the rest of the system

 

[jboydgolfer]

that's expected when something is triggered on the PSU, because the PSU has no way to report back to the rest of the system

i just hope the new 1000 Watt Seasonic will remedy this issue, it kills me to have to implement a $250 fix, but i dont think i have much choice.

 

[toilet pepper]

By any chance are you daisy-chaining PCIE cables? That could also be it.

 

[jboydgolfer]

By any chance are you daisy-chaining PCIE cables? That could also be it.

if you mean me, then no. i use a cable for each female plug on the Adapter cable. using a single cable, causes the OVP to kick in even faster (maybe the added capacitors while using a second cable might increase its resistance to overload, but im no power expert). i would imagine it would have to be that, since the Focus+ has a single +12V rail, using one cable or two shouldnt effect anything, atleast in my laymans understanding.

ill update my results when the 1000Watt Focus+ arrives. what i dont get is i can run 3DMark without restarts. im not a big gamer, so i only have escape from tarkov installed currently, running EFT brings a total shutdown in seconds, but timespy, or firestrike 4k can run all day. i dont get that

 

[toilet pepper]

In theory, your PSU should work. Have you checked newer/older drivers? Some protection kicks in if you daisy chain wires. A single wire can only carry certain wattage and amps that's why it is not advised to daisy chain them.

ill update my results when the 1000Watt Focus+ arrives. it blows my mind they are able to squeeze 1000W PSU in the same case as a 550W

I'm using a 750 watt only a bit larger than my palm.

 

[jboydgolfer]

Have you checked newer/older drivers?

im running the most recent driver, but ill try the older version right now & see if it bears fruit. id love to save the $260, & the time it takes to swap PSU's

Edit
Rolling back to the second most recent driver fixed it apparently. Why is it we always overlook the most obvious things

2x edit. It ran for a while but it finally crashed about 10 minutes in.

 

[toilet pepper]

im running the most recent driver, but ill try the older version right now & see if it bears fruit. id love to save the $260, & the time it takes to swap PSU's

Edit
Rolling back to the second most recent driver fixed it apparently. Why is it we always overlook the most obvious things

2x edit. It ran for a while but it finally crashed about 10 minutes in.

What application are you using to cause the crash? Anything else using the 12 volt line? Try undervolting it to check if that really is the case.

 

[jboydgolfer]

What application are you using to cause the crash? Anything else using the 12 volt line? Try undervolting it to check if that really is the case.

escape from tarkov kills it every time. i can run 3dMark & it completes the run with no issue. ive never encountered this with my 2080ti, so im guessing Wizard was right, & it is spiking wattage, causing the PSU to shut down due to protection. i have the 1000Watt seasonic ordered, maybe ill be able to resell the 750watt here so its not as total loss.

there are tons of users reporting just this situation on the WWW. 99% of the time, it is using normal power, but those spikes are too much for what would normally be sufficient PSU's.

 

[thesmokingman]

escape from tarkov kills it every time. i can run 3dMark & it completes the run with no issue. ive never encountered this with my 2080ti, so im guessing Wizard was right, & it is spiking wattage, causing the PSU to shut down due to protection. i have the 1000Watt seasonic ordered, maybe ill be able to resell the 750watt here so its not as total loss.

there are tons of users reporting just this situation on the WWW. 99% of the time, it is using normal power, but those spikes are too much for what would normally be sufficient PSU's.

Use hwinfo and use it to show your powerdraw in the osd. I use it to show both cpu and gpu powerdraw which gives a clearer understanding of usage.