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Helpful ReplyHot!Undervolting - My experience

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Dabadger84
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Re: Undervolt - My experience 2021/01/18 23:07:48 (permalink)
recipe7
The following are my updated stats with the ftw3 air cooler and ftw3 ekwb:

Port Royal Runs
Stock voltage results at +118% PT, ambient 25C, air cooler:
1.081v (throttled down to 1.068) 1980core (throttled down to 1950) +0mem 70C
1.081v (throttled down to 1.043) 2130core (throttled down to 2070) +500 mem 74C
Undervolting results at 118% PT, ambient 25C, air cooler:
0.850v 1950core +500mem 58C
0.875v 1995core +500mem 58C
0.900v 2010core +500mem 59C
0.925v 2015core +500mem 60C
0.950v 2025core +500mem 62C
0.975v 2055core +500mem 68C, drops to 2044core due to throttling

Stock voltage results at +118% PT, ambient 25C, ekwb:
1.081v 1980core +0mem 42C
1.081v 2130core +500 mem 44C

Undervolting results at 118% PT, ambient 25C, ekwb:
0.850v to 0.975v have the same results, with the temps in the mid 30s.
1.000v 2130core +600mem 38c (Stable)
1.020v 2175core +600mem 39c (fails a third of the time unfortunately)

For my daily I have it set to 1.0v at 2130 core and 500 memory.




I assume by the 118% PL that this is a 3080 yes?  Just curious.

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#31
recipe7
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Re: Undervolt - My experience 2021/01/18 23:22:22 (permalink)
Correct.


#32
raidflex
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Re: Undervolt - My experience 2021/02/01 15:45:39 (permalink)
I did a little testing with undervolting but I seem to get worst results, the core clocks just are not as high as stock volts. This is what I was able to get with my 3080 XC3 Black with +250 Core and +1000 mem at stock voltage. I am wondering if I am better off just leaving it at stock voltage. 
 
In COD Cold War it boost to 2150 and basically holds the clocks, due to the low temps since I have a WC block on it. 
 
https://www.3dmark.com/3dm/57717204?

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#33
Dabadger84
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Re: Undervolt - My experience 2021/02/01 16:00:13 (permalink)
The thing about undervolting isn't trying to get a high OC, it's about trying to get faster than stock clocks, at lower than stock voltage, and thereby lower than stock temps, and lower than stock power draw.
 
As an example I'm running 2100MHz @ 1025mV on my Kingpin - stock boost clock settles around 2040MHz typically (2025-2055), and voltage is 1063-1093mV... that resulted in lower temps and less power draw as well.
 
You're not going to be able to run your highest-stable OC with an undervolt most likely - as it's the highest OC you can get on the maximum voltage the card will allow.  In terms of power draw & temperature, you're always going to be better off with an undervolt/OC than running at stock voltage with an overclock.  And you're not going to see a huge performance dip going down the few steps in MHz to get to a good undervolt/OC, so overall, I think it's worth it, but I'm sure those wanting to squeeze every ounce they can out of their card performance wise would disagree.

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#34
raidflex
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Re: Undervolt - My experience 2021/02/01 16:11:48 (permalink)
Dabadger84
The thing about undervolting isn't trying to get a high OC, it's about trying to get faster than stock clocks, at lower than stock voltage, and thereby lower than stock temps, and lower than stock power draw.
 
As an example I'm running 2100MHz @ 1025mV on my Kingpin - stock boost clock settles around 2040MHz typically (2025-2055), and voltage is 1063-1093mV... that resulted in lower temps and less power draw as well.
 
You're not going to be able to run your highest-stable OC with an undervolt most likely - as it's the highest OC you can get on the maximum voltage the card will allow.  In terms of power draw & temperature, you're always going to be better off with an undervolt/OC than running at stock voltage with an overclock.  And you're not going to see a huge performance dip going down the few steps in MHz to get to a good undervolt/OC, so overall, I think it's worth it, but I'm sure those wanting to squeeze every ounce they can out of their card performance wise would disagree.




What I am finding is that since my temps are already so low around 40C I do not see dips when gaming or benching, once the clocks hit their max the core is basically locked at that speed, maybe dropping 1 step at most. 
 
The issue I have is I am very power limited, so I was trying to lower the voltage to lower the power draw.  I may just need to do more testing. 

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#35
Globespy
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Re: Undervolt - My experience 2021/04/12 14:22:38 (permalink)
It really depends on the power limit of the card, and whether the game/app hits that limit.
The Port Royal bench is fine, but you would be better running the PR stress test, as it will push your card harder, like some games will.
You can turn on the power monitoring option in afterburner while you run the test, you can see the power usage spikes when the test is done to find out if you were bouncing off your cards power limit.

You might already know all this, given you're obviously on a custom water loop. 😜
#36
kraade
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Re: Undervolt - My experience 2021/04/12 15:14:34 (permalink)
My Favorite for gaming right now is .831 mv at 1875hz  +1110mem  PR-11386 267watt Gaming temp 45-50c 3080 FTW3 Hybrid


#37
Slimmer
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Re: Undervolt - My experience 2021/04/20 00:56:43 (permalink)
So EVGA cant put out a firmware update to deal with the heat issue?   
 
I remember them putting out a firmware update right before the 1080 pads were sent out and that alone dropped my temps more than 10c, but I installed the pads anyways (better resale value). 
 
 
post edited by Slimmer - 2021/04/20 01:00:19
#38
samsaam
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Re: Undervolt - My experience 2021/04/28 23:07:39 (permalink)
kraade
My Favorite for gaming right now is .831 mv at 1875hz  +1110mem  PR-11386 267watt Gaming temp 45-50c 3080 FTW3 Hybrid




This is pretty good voltage at that clock speed. I hope to own a 3080 one day
#39
ddog661
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Re: Undervolt - My experience 2021/04/28 23:32:49 (permalink)
Water cooled is the way to go I see

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#40
LordSyrion
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Re: Undervolt - My experience 2021/04/30 06:22:13 (permalink)
I haven't been able to undervolt my 3080 ftw3 unfortuantely. Even dropping voltage by 10mv isn't stable, I fear I did not win the silicone lottery.

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#41
WhiteWolf92
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Re: Undervolt - My experience 2021/05/10 11:28:06 (permalink)
LordSyrion
I haven't been able to undervolt my 3080 ftw3 unfortuantely. Even dropping voltage by 10mv isn't stable, I fear I did not win the silicone lottery.


Happens, I got the same thing with my amd 5600x... Everyone is pushing 4.7 or 4.8 while I am barely stable at 4.5. 
Silicone lottery, you do not get to pick it it picks you ;)
#42
kccoshb
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Re: Undervolt - My experience 2021/05/10 11:45:08 (permalink)
gonsa
alexvar1
Hi Man, How did you do that? with VF Curve Tuner?


Yes, with the curve. I used AB.
Check these two videos. It's super simple. Drag the whole line down with Alt pressed and then choose the voltage you want and climb that up to the desired clock. Then press Apply and the whole line will line up with the clock.

 

 


Thanks for posting the videos I've been thinking about doing it for my 3090FE.
#43
Thurmod
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Re: Undervolt - My experience 2021/05/10 12:15:23 (permalink)
Wish I could mess with the cards but still waiting on mine. Cool to read about though. 

08G-P5-3767-KR 5/6/2021 11:51:11 AM PT No
10G-P5-3885-KR 4/29/2021 9:03:23 AM PT No
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24G-P5-3987-KR 4/28/2021 9:13:32 PM PT No 
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#44
Hauntersghost
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Re: Undervolt - My experience 2021/05/10 23:09:20 (permalink)
Any issues with coil whine before the undervolting? 
#45
Intoxicus
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Re: Undervolt - My experience 2021/05/11 07:47:08 (permalink)
jenkeeez
can undervolting give better frames ?


 Indirectly. And not guaranteed.

In theory by undervolting you keep temps lower which means less boost clock throttling.
Depending on your specific GPU there is a temp limit where when it hits it the boost curve will throttle you to keep it in that temperature range.
If you use and OSD to monitor your temps and core clock you can see it happen dynamically. 

If you keep temps lower you get better boost OC for longer.

Basically the way the boost curve works is the better you can cool your GPU the better you will perform.
This is why those hybrid kits are actually worth it. By keeping the core temps to 50C-55C you get overall better performance and higher OC potential.
This is also why full loop water cooling can be worth it. 

"Humans are not rational animals, humans are rationalizing animals." -Robert A Heinlein
#46
andreibondrea
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Re: Undervolt - My experience 2021/05/18 23:12:06 (permalink)
real science here :)
#47
jimbopoppins
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Re: Undervolt - My experience 2021/05/20 03:24:14 (permalink)
gonsa
alexvar1
Hi Man, How did you do that? with VF Curve Tuner?


Yes, with the curve. I used AB.
Check these two videos. It's super simple. Drag the whole line down with Alt pressed and then choose the voltage you want and climb that up to the desired clock. Then press Apply and the whole line will line up with the clock.
https://youtu.be/zUkPAVcb9Xc?t=521
 
https://www.youtube.com/watch?v=FqpfYTi43TE
 


That does seem super simple.  Thanks for the links..  I guess this will give me something to do with my 1080ti while I wait for a new GPU.
#48
BillBoyTM
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Re: Undervolting - My experience 2021/05/20 11:15:41 (permalink)
undervolting just damages your card while keeping performance the same.. overclocking is the safer thing to do.
#49
jimbopoppins
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Re: Undervolting - My experience 2021/05/20 12:41:29 (permalink)
How does it damage the card?
#50
kikng
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Re: Undervolting - My experience 2021/05/20 23:57:28 (permalink)
So I've been going back and forth with undervolting and just using the power limit in AB.  I ended up at 80% power limit, +60 core and +200 mem, which gets me in the 1900-2010 range depending on the game engine.  When I undervolted, sure I could get some clocks at a range of voltages stable, but stability would vary.  While one game was smooth sailing, another would crash randomly.  It turned into an endless switching of profiles and tweaking core clock, but in using the power limit slider I basically get a dynamic overclock that's stable.  The core clock changes, but my frametime is solid so I'm back to just doing that, using the power limit.  Card runs at about 55c in any given game, I'm viewing 3440x1440 and most things maxed out in rasterized titles run 110-140fps and raytraced at 65-100fps.  The card delivers! :D
 
I'm more curious what people see with their hybrid AIO's and what temp they get to?  Mine climbs to about 50 and evens out at 53-55, but man that's hot to the touch.  Running Noctuas Push/pull exhaust at 850rpm.
#51
hoffmannbeck
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Re: Undervolt - My experience 2021/05/23 09:56:28 (permalink)
Nice!
#52
Gr3yGhost
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Re: Undervolt - My experience 2021/05/24 16:59:16 (permalink)
I cant wait to get a 3080 of my own to try undervolting and overclocking. 

I've seen some good results doing so. Sadly my 980Ti refused to undervolt. But boy does it overclock decently well. 


 
#53
Fennario
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Re: Undervolt - My experience 2021/12/02 13:00:23 (permalink)
1860mhz at .825mv +200 memory 100% PL on 3090 FTW Ultra.  Used the Afterburner OC curve and saved it into Precision X1.  Not sure why Afterburner gave me an undervolt this time, but maybe because I had previously set a custom undervolt at .850mv/1860mhz.  12942 Port Royal score with Firefox in the background (13100ish otherwise) - maxed at 56.7 degrees/311 watts.
post edited by Fennario - 2021/12/02 13:20:30
#54
kraade
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Re: Undervolt - My experience 2021/12/02 19:17:01 (permalink)
Current = KPE HB  .925v  @1980 mhz  +1150mem +111%PT - 14227 Port Royal at 382W under 50c


#55
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