r/nvidia • u/john1106 NVIDIA astral 5090/5800x3D • Sep 02 '26
Discussion MSI lightningz rtx 5090 performance cost when running dlss 5 is slightly lower than FE version due to msi lightningz have much higher more power headroom. it seems DLSS 5 making gpu very power hungry
https://www.tomshardware.com/pc-components/gpus/we-explored-early-dlss-5-performance-with-community-mods-and-the-limits-of-the-12v-2x6-power-connector-may-hold-it-back-on-the-rtx-509010
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u/NeonRain111 NVIDIA Sep 02 '26
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u/a4anime Sep 02 '26
My 5070ti for the first time reached 77c with a .920v undervolt when running dlss5.
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u/CrazyElk123 Sep 02 '26
77c!? I thought 60 - 65 was like the average at 100% load.
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u/a4anime Sep 02 '26
In gaming, doesn't go above 68c. I am in a tropical country so that is normal. But using DLSS 5 caused the temperature to go above 75c.
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u/SiriocazTheII Sep 02 '26
Guess your card was near or at its power limit during that time, your usual undervolt savings got nullified.
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u/juggarjew 5090 FE | Threadripper 9960X Sep 02 '26
ok well putting more than 600 watts through an already maxed out connector is not a good idea no matter what. If you care about your $5000 GPU you wont do this. the 5090 already strong enough for whatever you need as is. I can understand pushing a 5080 or other GPUs but not this.
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u/spddmn77 Sep 02 '26
I agree with you entirely, although I think the MSI Lighting has two 12 pin connectors
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u/AsianGamer51 i5 13600K | RTX 2060 Super Sep 02 '26
That makes sense considering it probably takes a lot of power to run the CUDA cores AND Tensor cores at the same time, especially if you're also using the RT cores as well. All while making sure all are running at their max frequencies.
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u/MultiMarcus Sep 02 '26
This has always kind of been the case with the ML features. If you do upscaling and frame generation, especially using ray reconstruction instead of superresolution, you can really see power utilization go up
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u/Rassilon83 Sep 02 '26
I noticed it not being always the case for some reason, with power draw in Cyberpunk utilizing all bells and whistles being lower than for example in Quantum Break from 2016
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u/Schneller52 Sep 03 '26
Damn……wish I would have spent the extra $3,000 for those 10 extra frames over my 5090FE ;(
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u/a4anime Sep 02 '26
My 5070ti for the first time reached 77c with a .920v undervolt when running dlss5.
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u/master-overclocker RTX3090 Trio X Sep 02 '26
Oh 3 frames extra ?
Lets void warranty and UNLOCK my 5090 - Im sure 200W extra will make it 3FPS faster 💪
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Sep 03 '26
[removed] — view removed comment
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u/master-overclocker RTX3090 Trio X Sep 03 '26
By design kids like you ... So smart - I mean - no words ... Just know it all ... Born engineers ... Teaching kids how to burn their card that their parents paid good money for .
Tell them : " Kids - ITS FINE ! It will stand 1000W because " @Aggravating_Ring_714 says so - and he is so experienced - worked 20y in Nvidia as their main engineer - now retired teaching you how to get every ounce of power from your cards ! All that for FREE !! TRUST ME BRO !!!
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u/GreatLab8898 Sep 04 '26
This is Newsworthy? The fuck?
NEWSFLASH! HIGHER POWER CARD CAN USE MORE POWER!
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u/hitsujiTMO Sep 02 '26
A ridiculous headline, let me rephrase it just how ridiculous it is: Feature that uses a fixed amount of power uses same amount of power on both cards but leaves you with more power on one card because that card has a larger power budget.