i have a 
EVGA 220-G5-0750-X1 Super Nova 750 G5, 80 Plus Gold 750W

Are those ok?

AnnahsBananas
i have a 
EVGA 220-G5-0750-X1 Super Nova 750 G5, 80 Plus Gold 750W

Are those ok?

Honestly, not too sure. There are no reviews on that PSU in particular so its hard to say. Some people have success with 750W and some don't. Some have success with 850W and some don't. I'd say u run it first for a few weeks. If you don't run into any problem such as the computer powering off/rebooting then you should be fine. This card alone draws about 380W to 400W which is over half of your psu capacity itself. You may have to undervolt it to lower the power consumption. I have a friend running a 3090 undervolted on his 650W just fine.  It was originally drawing 360W for him, and undervolting it reduce consumption by about 100W.

oh wow ok

ptphan

AnnahsBananas
i have a 
EVGA 220-G5-0750-X1 Super Nova 750 G5, 80 Plus Gold 750W

Are those ok?

Honestly, not too sure. There are no reviews on that PSU in particular so its hard to say. Some people have success with 750W and some don't. Some have success with 850W and some don't. I'd say u run it first for a few weeks. If you don't run into any problem such as the computer powering off/rebooting then you should be fine. This card alone draws about 380W to 400W which is over half of your psu capacity itself. You may have to undervolt it to lower the power consumption. I have a friend running a 3090 undervolted on his 650W just fine.  It was originally drawing 360W for him, and undervolting it reduce consumption by about 100W.

I'm just curious, why people undervolting their cards?

AWK16
I'm just curious, why people undervolting their cards?

I was thinking the same thing.

AWK16

ptphan

AnnahsBananas
i have a 
EVGA 220-G5-0750-X1 Super Nova 750 G5, 80 Plus Gold 750W

Are those ok?

Honestly, not too sure. There are no reviews on that PSU in particular so its hard to say. Some people have success with 750W and some don't. Some have success with 850W and some don't. I'd say u run it first for a few weeks. If you don't run into any problem such as the computer powering off/rebooting then you should be fine. This card alone draws about 380W to 400W which is over half of your psu capacity itself. You may have to undervolt it to lower the power consumption. I have a friend running a 3090 undervolted on his 650W just fine.  It was originally drawing 360W for him, and undervolting it reduce consumption by about 100W.

I'm just curious, why people undervolting their cards?

I cant speak for everyone, but generally it is to maintain the highest stable clock speed with the lowest amount of voltage. Typically, when you first put load (aka doing anything graphic intensive such as playing games, video rendering etc) on the card, your card will initially run at say 1995 MHz. Your core voltage will jump up and down automatically from say .800V to 1.062V base on the load condition to make sure that the card is stable and does not crash. Higher the voltage = higher thermals. Higher thermals = thermal throttling = your core clock not being able to maintain the 1995 mhz and automatically downclocking itself to say 1935 to maintain good thermals. So people who undervolt would rather have a stable clock at a constant 1900 mhz at significantly less power consumption and minimal performance loss versus having the gpu fluctuate its clock from 1995 mhz back and forth to 1875 mhz all the time. 
 
Also, for the 3080 since there is no real overclocking headroom, therefore increasing power consumption for a 5% boost is kind of pointless unless you are chasing a top 10 overclocking score on 3Dmark. Dropping the voltage down to around .825 will reduce your power consumption from 360 to 220W ish for minimal performance loss. You could watch some guides of how to do so if you are interested. 

I would like to add my experience to the list. Ive read through all 13 pages and have not seen anyone else with my situation.


PC:
Ryzen 7 3700x stock cooler
MSI X570 tomahawk Wifi
32GB oLoY 3600mhz ram
Samsung 970 evo M.2
2tb seagate HDD
EVGA 3080 FTW3 Ultra
EVGA 850w GA super nova
Lian Li strimmer plus extensions 24-pin and 2x 8-pin. (Two 8-pins from the strimmer and one stock 8-pin power the GPU)
 
So far the only issue I have had is booting the system. Everything turns on like normal but there is no display and the GPU fans dont turn on. To remedy this I cycle the switch on the PSU and then boot the system. Sometimes it takes a couple tries, but once its on, its on.

I cant seem to make it crash like many others are reporting. Ive run the three 3DMark benches and COD MW so far.
 

ptphan

AWK16

ptphan

AnnahsBananas
i have a 
EVGA 220-G5-0750-X1 Super Nova 750 G5, 80 Plus Gold 750W

Are those ok?

Honestly, not too sure. There are no reviews on that PSU in particular so its hard to say. Some people have success with 750W and some don't. Some have success with 850W and some don't. I'd say u run it first for a few weeks. If you don't run into any problem such as the computer powering off/rebooting then you should be fine. This card alone draws about 380W to 400W which is over half of your psu capacity itself. You may have to undervolt it to lower the power consumption. I have a friend running a 3090 undervolted on his 650W just fine.  It was originally drawing 360W for him, and undervolting it reduce consumption by about 100W.

I'm just curious, why people undervolting their cards?

I cant speak for everyone, but generally it is to maintain the highest stable clock speed with the lowest amount of voltage. Typically, when you first put load (aka doing anything graphic intensive such as playing games, video rendering etc) on the card, your card will initially run at say 1995 MHz. Your core voltage will jump up and down automatically from say .800V to 1.062V base on the load condition to make sure that the card is stable and does not crash. Higher the voltage = higher thermals. Higher thermals = thermal throttling = your core clock not being able to maintain the 1995 mhz and automatically downclocking itself to say 1935 to maintain good thermals. So people who undervolt would rather have a stable clock at a constant 1900 mhz at significantly less power consumption and minimal performance loss versus having the gpu fluctuate its clock from 1995 mhz back and forth to 1875 mhz all the time. 
 
Also, for the 3080 since there is no real overclocking headroom, therefore increasing power consumption for a 5% boost is kind of pointless unless you are chasing a top 10 overclocking score on 3Dmark. Dropping the voltage down to around .825 will reduce your power consumption from 360 to 220W ish for minimal performance loss. You could watch some guides of how to do so if you are interested. 

Very good explanation, thank you sir.

BattleBorn00
Just wanted to add my input because I just installed a 3080 FTW3 Ultra last night and everything worked out of the box. DDU'd everything first since I was coming from a 5700XT. Downloaded latest drivers straight from Nvidia. Downloaded PX1 and everything works so far. I haven't been able to check the OSD since it does say only for certain games. No overclock or undervolting yet. Just straight out of the box, installed, then played for an hour and a half of Warzone and Black Ops, everything ultra/high and enabled at 2k, min / max FPS between 130s to 170s. Sorry, not really concrete numbers, I was too excited to start gaming with it.
I received one crash error, but I was playing Black Ops Beta when it happened, so I'm not sure. But it only closed the game, no shut down or black screen. No power issues otherwise with a two year old Seasonic Prime PSU.
 
 
Specs: (everything bought at the beginning of this year if that matters)
Asus Prime X570 Pro
AMD Ryzen 7 3700X (No OC)
G.Skill Trident Z 32gb (2x16) 3600
2x Corsair MP600 1tb NVME SSDs
Seasonic Prime 1300W Gold (bought in 2018)
 
 
P.S. I don't believe that certain brands of PSU can handle these cards any better than a competitor. You-get-what-you-pay-for, sure, but so far all the issues seem to come from those with a little bit of headroom power-wise from the recommendation of Nvidia (750W). So certain brands might be able to regulate better than others given the low headroom. I do believe that a large overhead is needed for these cards. That's just my personal opinion. I emailed Seasonic about the issues I've seen on these forums and they assured me that my PSU can handle the power spikes of these new 3000 series cards. They didn't say what the floor output should be though, so I took that with some grain of salt. I'm also using generic braided cables from Asiahorse, connecting three completely separate power cables from the PSU to the GPU for the three power connectors. Everything worked fine last night. Time will tell if everything continues to work smoothly (fingers crossed). Going to put a little core and mem boost tonight and adjust the voltage curve, we'll see what happens.
 

Just curious, did you use the org. cables or you have your own custom. I'm asking because Platinum/Gold will have capacitors and even thou ripple in most circumstances wont shot down your PC or card, but we dealing with power hungry GPU.
 
I have similar PSU, but 1300W Platinum and I would like to use that PSU but with my own custom cables and I'm wondering if anyone have a positive experience with 1300 Prime and custom cables, otherwise I might just stick with my 1000 TX.

I also am having this issue with this card.
My system:
Intel i9-9900k@3.6GHz, RTX 3080 FTW3 ULTRA 10G-P5-3897-KR, 32 GB [16 GB x2] DDR4-3200 Memory Module - GSKILL Ripjaws V, GIGABYTE Z390 AORUS ULTRA, Thermaltake Toughpower Grand RGB 850W 80 PLUS Gold, Full Modular
I am monitoring gpu temps with Precision 1 and cpu temps with MSI Afterburner and have no high temps while gaming, but having repeatable reboot occurrences while gaming.
No overclock of CPU or GPU.
Should I RMA the card or is a fix coming?
I have even changed my Windows 10 power option from high performance to balanced and it does not help.