Johnwcaustin
Hi everyone!
 
I need help with my new evga rtx 3080 xc3 ultra and want to undervolting it.
I am New at undervolting and heard good things about doing such.
My main reason for doing this is to be able to use my Evga 650watt GA PSU and keep the temps down.
If someone one could point me in the direction of another thread or give me tips on how too I would greatly appreciate it.
 
Thanks again :)

Here are my findings with Precision X1 and I find it way more simple  to use and you will get the lower wattage used for sure. Along with less heat and lower fans. Your card wont be to far off of what mine has shown to do. I would start at 90 % on  the power setting and then to increments of 5 down and test with each bench mark to make sure of stability. 
 
I am going to guess maybe 70 % setting is were you will end up possibly less.  I can run my card at 60% power which greatly reduces the wattage, temps and still lets the card programming run the core clock and voltage up when it requires more but keeps the watts capped. 
 
Be sure to run the fans at 75% through all the testing , once you determine how low you can set the power and keep stability for both bench marking and games. You can then tweak the fans speeds and set them to a specific number and let them run at that setting. My fans run at  a constant 65% my temps don't exceed 61c and usually sit between 51 to 57 c. Compared to the auto default settings of 79c to 81 C . My post shows what I used for bench marking and monitoring.
https://forums.evga.com/3080-TI-FTW-and-Precision-X1-lowering-the-temperature-m3415344.aspx 

Johnwcaustin
Thank you for the tips. Just a quick question does the 3080 ti ftw act differently from 3080 xc3 ultra?

Well that video card needs slightly more power.
 
By the way an investment in an 850 watt PSU or higher is a better long term solution in my opinion.

@Fuzzy833:  Here is the link:  https://wccftech.com/undervolting-ampere-geforce-rtx-3080-hidden-efficiency-potential/

Johnwcaustin
Thank you for the tips. Just a quick question does the 3080 ti ftw act differently from 3080 xc3 ultra?

The process would be applied the same, there would be some differences in how the cards would respond to  the adjustments. You might not be able to get the same exact numbers, as my 3080ti but your numbers wouldnt really be that far off, you would still achieve the same goals in general, lower heat lower power used.
 
My other computer has a 1660 ti, it can only go down to 90% power setting, any further it becomes unstable.
 
As my findings with Precision X1 in my post shows I am achieving more or less the same results as afterburner does.
The differences are:
 
AfterBurner adjust the power down by setting the voltage, ( the wattage use comes down as well with that setting) they can instruct the card to maintain a level core clock performance and stay locked at that setting. This seems to restrict the cards programming to auto adjust the voltage and core speeds.
 
Precision X1 can also do the same as above (locking the core speed at particular setting is slightly more complicated.) But just using the Precision X1 power setting slide bar  to make the adjustment easier. When you slide or set it to a lesser number, the voltage and the wattage drop. From what I seen it seems to control the wattage instead of the voltage, the reason I say this is because I can watch the wattage stay in place while the voltage and the Core speeds fluctuate from their low setting to higher settings. The cards programming is still free to make those adjustments when it senses it needs to. As I have already stated I see those high core clock speeds over 1800 mhz in games that require or want to use more of that part of the card. If the game you are playing doesnt require all that core clock speeds it will adjust down the number below 1800 mhz. Usually no more than 150 mhz. 
 
Both programs basically achieve the same goals, lower settings for both drop FPS slightly, hard core and OCD gamers like to have absolute exact control thus they prefer Afterburner. I personally prefer to cap the wattage and let the cards programming do its thing while I am playing a game. The cards default settings during game play runs hot and the core clock speeds moves a lot up and down. By the settings I use with Precision X1 , I see consistent much lower temperatures, far less power used and more stable core clock speeds without restricting the cards programming compared to Afterburner.
 

Just a quick note: lowering the power target and undervolting are not the same thing. One has been extremely easy for many generations, while the other hasn't and requires a little attention to detail and testing new settings along the way to ensure stability. I'd second the suggestion of reading through a guide. You don't want to lower voltage to 60-70% unless you want to have a really bad time.
 
Also, the silicon quality will determine how well a chip can clock at a certain voltage. Since FTW3 are supposed to have the better quality chips (to overclock higher), the XC3 SKUs will not likely be a perfect match regarding numbers. The concepts & steps are all the same, but you may have to set voltage a tad higher to be stable at the same clock speed.

Well, I guess all undervolting really is is OVERclocking certain voltages!