rx 7900xt undervolting

[Deleted member 237813]

Since i bought a 7900xt a few days ago for my main rig because the ti super dissapointed me not to mention the vaule here for the radeon card is much much better , i wanted to ask if anyone here can share some numbers or experiences with the card. i only had a 7800xt for a few weeks otherwise my experience with Rdna 3 is like zero.

and since i undervolt all of my cards but its the same on nvidia since pascal cards, amd cards always differ in my experience so why not

greetings from the alps

 

[kapone32]

The 7900XT is a great GPU. Yo[u should have no issue undervolting in AMD software. There is a section of the software dedicated to OC features. Even has a stress test as well.

 

[Deleted member 237813]

I know dude im not a beginner at all i just wante to gather some info before jumping in my card arrives tommorrow.

i was just searching for a sweetspot number like 2500mhz @ 1000 mv for example. and i know that rdna 3 is locked down quite a bit due to MCM design and amds issue with it. but still i got an 7800xt to 225 watts with over stock performance .

 

[Zach_01]

I would ask for more info about your goal.
1. You want undervolt to OC?
2. To make it more efficient even if you loose a smal margin of performance?
2. To make it more efficient without loosing performance for cooler/quiet card?
3. Anything else??

Whatever you goaI may be I understand you want some starting point but different AIB cards can have very different (GPU, VRM, PCB in general) behavior regarding undervolting, OC... etc
Different games, resolutions and game settings can make difference in voltage requirements too.
And its not like that you can do damage while undervolting. You slap the slider and if it crashes no harm done, go a few steps back.

 

[Deleted member 237813]

No i want to improve the efficiency but after testing today i came to the conclusion that you can esily improve it in non heavy games but put on avatar frontiers of pandora for example and you will need every watt that you can get. with -10 powerlimit and like 2400mhz@1020mv it pushes core clock down to 2000mhz depending on where you are. thats 4-5% slower than stock, stock its like 2250-2400mhz. Overclocked its like 2450-2550 with 360 Watts in othe rgame sthat easily 2600-2900mhz but avatr will kill it. good optimized title it really pushes shaders to its knees.

the card goes pretty hard overclocked faster than a 4080 often enough in raster performance depending on the game.

avatar is insane what a killer and stability test master.

This is what i have in 2077 4k native, pretty good over stock performance with 31,5 Watts lower at the same time

 

[adilazimdegilx]

You can just remove the power limit. In fact, just let it run on max power limit. Unlike undervolting, power limiting doesn't give you overall free efficiency gains. Anytime when card hits the power limit, it has to lower its clocks therefore lose some performance to stay within limits. Avatar has inherit RT that you cant disable so it's probably making use of the RT cores as well, hence the GPU is hitting is the power target and lowering its clocks. Unless you are keen on staying under certain temperature and/or fan speeds just let the card use whatever power it wants to run in order to reach your set clocks. Efficiency in easier game loads wouldn't be effected by power limits. After all, power limit is a hard limit unlike voltage offset. As long as it doesn't hit that limit, card would just perform like it's not there.

But it matter of one's preferences really. If you are okay with losing 4-5% in some loads just use it as it is.

 

[Deleted member 237813]

7900xt has no rt cores, rt is operating through ususal cus. thats one of the reasons why the hit is so high.

well rdna 3 cant be undervolted all you save is coming from the pl. or you sacrifice a lot of performane and set core much lower. avatr is not even stable with 2600mhz@1070mv lol

avatar is just brutal below 2000mhz core clock with 290 Watts.

etro Exodus EE ist still the most hardcore i know nthat since ampere. down to 1790mhz i saw. insane still good performance in 4k but oc can get you 15%+ rdna 3 is a good overclocker much better than ada cards or ampere or turing or pascal since they are all the same in this regard.