I think I can fix the RTX 4090

[HC_writes]

 

Nvidia's RTX 4090 is the new king of GPUs. It laughs at last generation ray tracing performance, it shrugs off the most demanding of games, it... recommends a power supply with 850 to 1000 watts?! There's got to be a better way - and it starts with undervolting.

 

 

Buy an ASUS ROG Thor 1000W PSU: https://geni.us/hYBuKg

Buy an ASUS ROG Thor 850W PSU: https://geni.us/ISMMx

Buy a Seasonic Prime TX-750 PSU: https://geni.us/QHMjmT2

Buy a Seasonic Prime 650W PSU: https://geni.us/QJ4wC3

Buy a Seasonic FOCUS GX-550 PSU: https://geni.us/A1SFrHe

Buy an MSI GeForce RTX 4090 24GB: https://geni.us/RzBWp3

Buy a ZOTAC GeForce RTX 4090 24GB: https://geni.us/WANob9i

Buy an AMD Ryzen 9 7900X: https://geni.us/erid8M

Buy a 32GB Kit of Trident Z5 NEO DDR5: https://geni.us/wUAED8M

Purchases made through some store links may provide some compensation to Linus Media Group.

[emosun]

From the title I thought you guys were gonna put a normal power connector on it

[ZetZet]

32 minutes ago, emosun said:

From the title I thought you guys were gonna put a normal power connector on it

Just solder the wires directly to it. Now that's a permanent fix. 

[MeetArthur]

Very reminiscent of the Der Bauer RTX 4090 performance review. He was suggesting european consumers all set the power targets lower to consumption and their monthly power bill.

[CommanderAlex]

19 minutes ago, ZetZet said:

Just solder the wires directly to it. Now that's a permanent fix. 

Love it!!

 

Replace the current 12VHPWR connector with pins that are twice as thick to account for the 600W power rating or more (I'm not electrical engineer here). 

[ZetZet]

1 minute ago, MeetArthur said:

Very reminiscent of the Der Bauer RTX 4090 performance review. He was suggesting european consumers all set the power targets lower to consumption and their monthly power bill.

Buy a 2000 Euro graphics card, save 2 Euros a month on electricity. 

[Ubersonic]

Something people often forget is that It's not all about what you "need" with PSUs.  A PSU is at it's most efficient when at 50% load.

[ZetZet]

32 minutes ago, Ubersonic said:

Something people often forget is that It's not all about what you "need" with PSUs.  A PSU is at it's most efficient when at 50% load.

And how is the most efficient part relevant? So if your system uses 500W max you pay through your nose for a 1000W PSU to then save 1 cent a month on electricity through efficiency? Or do you think the trees will thank you for buying more e-waste, but then saving electricity? 

[Uttamattamakin]

My hypothesis is that the best silicon, tuned for using just the power it needs and with reasonable 2 slot cooling is going to become RTX 6000 Ada generation professional cards.  

 

It may be that Nvidia purposefully speced the consumer grade silicon as they did to be certain that professional and server users would not slap those much less expensive cards into their systems.   If we see the Ada generation "Quadro" cards having more reasonable power and cooling specs then we'll know. 

[Middcore]

5 minutes ago, Uttamattamakin said:

My hypothesis is that the best silicon, tuned for using just the power it needs and with reasonable 2 slot cooling is going to become RTX 6000 Ada generation professional cards.  

 

It may be that Nvidia purposefully speced the consumer grade silicon as they did to be certain that professional and server users would not slap those much less expensive cards into their systems.   If we see the Ada generation "Quadro" cards having more reasonable power and cooling specs then we'll know. 

 

Would not be the first time Nvidia purposefully nerfed GeForce cards to protect Quadro sales.

[Alfakr0ll]

Strange that LTT didnt know, or didnt explain, that PSUs limit is not in the power draw but in the power delivery. So a 650W with a efficiency of 80% will draw up to 780W from the wall. The less efficient it is the more power the PSU will need to properly power the PC.

[CommanderAlex]

32 minutes ago, Alfakr0ll said:

Strange that LTT didnt know, or didnt explain, that PSUs limit is not in the power draw but in the power delivery. So a 650W with a efficiency of 80% will draw up to 780W from the wall. The less efficient it is the more power the PSU will need to properly power the PC.

I was thinking the same thing when Linus was "shocked" that it was drawing more power than what the PSU is rated. Lmao, that's not how it works Linus. 

[Spotty]

I appreciate including the warning about not mixing PSU cables included in the video.
I must admit that I didn't know you could hold Alt when dragging the voltage/clock curve in MSI afterburner. That's actually really useful to know.

 

 

47 minutes ago, Alfakr0ll said:

Strange that LTT didnt know, or didnt explain, that PSUs limit is not in the power draw but in the power delivery. So a 650W with a efficiency of 80% will draw up to 780W from the wall. The less efficient it is the more power the PSU will need to properly power the PC.

9 minutes ago, CommanderAlex said:

I was thinking the same thing when Linus was "shocked" that it was drawing more power than what the PSU is rated. Lmao, that's not how it works Linus. 

I'm assuming Linus was just acting it up for the camera. In addition to the efficiency losses, power supplies won't trip OCP/OPP as soon as they go over what they're rated for. It's normal for OCP/OPP to be set anywhere from 120 to as high as 140% the rated load. The Seasonic Prime Titanium 650W they used at the end of the video won't trip OPP until 140% load.

What is surprising though is the system with the Seasonic GX-550 was shutting down below 550W power draw from the wall (would be <500W output). Those wall power meters are slow though and won't catch any sudden spikes in power draw such as when the game first loaded up, so it's possible the power draw was spiking beyond what the power meter was reporting. Could have also been tripping due to transient spikes that the PCAT wouldn't catch. Still seems like the PSU should have been able to handle the load and shouldn't have been shutting down when it was.

[MingLee420]

14 hours ago, HC_writes said:

 

Nvidia's RTX 4090 is the new king of GPUs. It laughs at last generation ray tracing performance, it shrugs off the most demanding of games, it... recommends a power supply with 850 to 1000 watts?! There's got to be a better way - and it starts with undervolting.

 

 

Buy an ASUS ROG Thor 1000W PSU: https://geni.us/hYBuKg

Buy an ASUS ROG Thor 850W PSU: https://geni.us/ISMMx

Buy a Seasonic Prime TX-750 PSU: https://geni.us/QHMjmT2

Buy a Seasonic Prime 650W PSU: https://geni.us/QJ4wC3

Buy a Seasonic FOCUS GX-550 PSU: https://geni.us/A1SFrHe

Buy an MSI GeForce RTX 4090 24GB: https://geni.us/RzBWp3

Buy a ZOTAC GeForce RTX 4090 24GB: https://geni.us/WANob9i

Buy an AMD Ryzen 9 7900X: https://geni.us/erid8M

Buy a 32GB Kit of Trident Z5 NEO DDR5: https://geni.us/wUAED8M

Purchases made through some store links may provide some compensation to Linus Media Group.

undervolting is the way to a colder room 

[Sarra]

13 hours ago, Spotty said:

What is surprising though is the system with the Seasonic GX-550 was shutting down below 550W power draw from the wall (would be <500W output). Those wall power meters are slow though

Homeless, I mean, transient loads, most likely. That PSU probably didn't have enough surplus capacity built in for the spikes, so it triggered OCP.

 

You'd need a scope to see the transient loads, would be interesting to see the actual spikes.

[GodAtum]

Please could someone explain the thing about not using the same modular cables? I've collected a huge bunch of them over the years and have swapped and changed them out with different PSUs no problem.

[DoctorNick]

29 minutes ago, GodAtum said:

Please could someone explain the thing about not using the same modular cables? I've collected a huge bunch of them over the years and have swapped and changed them out with different PSUs no problem.

Modular cables are different from PSU to PSU (most of the time). Some models use the same OEM design and will be using the same cables. For example I have swapped cables from evga g2 to a evga bq and they work fine. You'll have to check before doing this as it could fry your psu and or component connected to the psu.

[thanhlam]

Now we know a 650w power supply can run a RTX 4090. We know the limit of power that one 4090 need. Soooo wat is the minimum require for dual RTX 4090? That the question I need to know after watching this vid xD

[HumdrumPenguin]

On 10/25/2022 at 11:01 AM, ZetZet said:

Buy a 2000 Euro graphics card, save 2 Euros a month on electricity. 

Do you know what's the actual average savings if you lower the power cap? I live in Vancouver if that helps, and I normally play about an hour a day during weekdays, and 3-8h a day on weekends.

[ZetZet]

15 minutes ago, HumdrumPenguin said:

Do you know what's the actual average savings if you lower the power cap? I live in Vancouver if that helps, and I normally play about an hour a day during weekdays, and 3-8h a day on weekends.

If you manage to drop consumption by a 100W that's almost 10 hours to reach 1kwh (a bit less, because of efficiency, but you will see how it barely matters later). Vancouver electricity seems to cost 10 cents per kwh. So 4 weekends means 20 cents for you. And 20 weekdays another 20 cents.

[HumdrumPenguin]

1 hour ago, ZetZet said:

If you manage to drop consumption by a 100W that's almost 10 hours to reach 1kwh (a bit less, because of efficiency, but you will see how it barely matters later). Vancouver electricity seems to cost 10 cents per kwh. So 4 weekends means 20 cents for you. And 20 weekdays another 20 cents.

Thanks for the math buddy. I won't worry much about power draw then. There will be almost no difference really.

[ZetZet]

48 minutes ago, HumdrumPenguin said:

Thanks for the math buddy. I won't worry much about power draw then. The will be almost no difference really.

In the winter it matters even less, you won't need to heat your house as much. 

[Just that Mario]

On 10/25/2022 at 8:06 PM, emosun said:

From the title I thought you guys were gonna put a normal power connector on it

From thumbnail I'd figure he somehow is gonna make it smaller whilst slapping a big ass cooler on it.