Do i need to change my Power Supply

[PierreFSX 5]

Hi,

I want to upgrade my video card GTX1080 TI to an RTX3090, does the new card needs more power? I currently have 750 watts.

Pierre Nantel

[ryanbatc 13,053]

A 3090?  I'd guess yes you would. Says a 750w required but I'd like a little buffer.  You can always try it hehe

Edited February 24, 2022 by ryanbatcund

[LRBS 953]

From my past experience with 10900K and 3090, 750 W power supply was at the border line.

I would suggest that you download a free software "open hardware monitor" at https://openhardwaremonitor.org and start monitoring your PC.

Each computer is so different, with the info provided you can fine tune your system or determine in your case if is necessary to change the PSU.

As an example I used it to see if it was a performance benefit with HT on or off, I fine tuned my affinity mask based on CPU core temps and loads for the P3D and other software for better performance.

I also had a 1080 Titan and switched to a 3090 Founders edition and found out that the first one was way quieter and less power hungry, performance between the two was negligible and made me wonder why did I switch. Me personally, I would wait for a while before new video cards show up on the market and re-evaluate. 

Give it a try before anything, please. 

[martin-w 3,266]

5 hours ago, PierreFSX said:

Hi,

I want to upgrade my video card GTX1080 TI to an RTX3090, does the new card needs more power? I currently have 750 watts.

Pierre Nantel

 

Surprisingly Nvidia say 750 watt minimum. But then of course if you buy an OC 3090 its requires more.

But no, its nonsense, I wouldn't risk a 750 watt. Especially in combination with a 10900K.

Others who have 750 watt PSU's have had  issues with transient power spikes. The 3080 and 3090 likes to do that. Those users who have switched to 1000 watts have mitigated the issue.

I opted for a 1000 watt EVGA PSU. 

Edited February 24, 2022 by martin-w

[stans 709]

750 watts is the bare minimum for a GTX 3090.  I think it is much safer to pair the 3090 with a high quality PSU in the 900 to 1000 watt range.

[PierreFSX 5]

Thanks everyone,

I am now questioning if I will get as many benefits for my money. I now understand that P3D or MSFS2020 will not leverage the extra memory. With P3D v5.3 and my GTX 1080, i have a steady 35 FPS with no stuttering. Maybe a lower card like then RTX3080 or 70 with at less 10 gigs will give as much benefits than an RTX 3090.

If I decide to upgrade, I will also upgrade my PSU to 1000 watts.

Thanks for all the advice.

Pierre 

[G-RFRY 1,735]

This is one of the BIGGEST lies in PC Building... - YouTube

[martin-w 3,266]

On 2/25/2022 at 1:33 PM, PierreFSX said:

If I decide to upgrade, I will also upgrade my PSU to 1000 watts.

 

If you go for 3080 or 3090 I agree.

The forums are full of those who have had issues with transient power pikes their 750's couldn't handle. 

 

[Brandon01110 407]

i have a 850w gold psu and have had no issues.  go 1000w because maybe 5 years from now video cards might use more power. 

[Luke 782]

5 years from now I'd just get a new power supply.

Cheers!

[martin-w 3,266]

15 hours ago, Brandon01110 said:

i have a 850w gold psu and have had no issues.  go 1000w because maybe 5 years from now video cards might use more power. 

 

As I mentioned... in regard to the 3080 and 3090, there was an issue with power spikes that were shutting down 750 watt PSU's. Nvidia released drivers that helped somewhat but the issue remained for some. 

It also depends on what else you are doing with your system of course. Once we add the 3090 OC bios and heavy 10900K CPU overlocks and other demands, plus the power spikes you can see the issue. 

You'd likely be okay with a quality 850 watt PSU. The OP's 750 isn't something I'd risk though. 

Interestingly, the new ATX v3.0 standard has features in place to deal with the power spike tolerance issue. The new power spike tolerances are significant, as much as 200% of rated power for brief periods. Intel have also said that they may impose power spike limits for cards. 

Edited March 7, 2022 by martin-w

[pgde 571]

Speaking of the future see