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Helpful ReplyHot!Undervolting - My experience

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gonsa
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2020/11/23 06:21:28 (permalink)
I've been playing around with undervolting my 3080 ftw3 ultra and I have found some interesting results.
 
I managed to undervolt to 925mv while keeping the stock clocks.
The results? way better temps, lower noise and high scores on 3DMark.
 
Scores on Port Royal:
Stock voltage - 11491
Undervolted - 11765
 
While gaming (AC: Valhalla and Microsoft Flight Simulator 2020) temps don't go over 60ºc at 80% fan speed.
I didn't try even lower voltages but I might.
If you try this, please share your results
post edited by gonsa - 2020/11/23 10:40:10

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alexvar1
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Re: Undervolt - My experience 2020/11/23 08:14:37 (permalink)
Hi Man, How did you do that? with VF Curve Tuner?

Alexis Vargas 
#2
Gamer55555
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Re: Undervolt - My experience 2020/11/23 08:18:06 (permalink)
Wow nice!
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gonsa
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Re: Undervolt - My experience 2020/11/23 10:39:56 (permalink)
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
 
post edited by gonsa - 2020/11/23 10:42:06

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Cornelius14
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Re: Undervolt - My experience 2020/11/23 12:12:58 (permalink)
I'm sure there are people who have achieved better results but:
 
Stock PR - 11 656
993mv @ 2085 with 935 on the memory - 12403
 
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jenkeeez
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Re: Undervolt - My experience 2020/11/23 15:07:06 (permalink)
can undervolting give better frames ?
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TheHyperMatrix
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Re: Undervolt - My experience 2020/11/23 19:05:28 (permalink)
Cornelius14
I'm sure there are people who have achieved better results but:
 
Stock PR - 11 656
993mv @ 2085 with 935 on the memory - 12403
 




That's actually really good.  The average 3090 is only around 10-12% faster than your score.

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chrisdglong
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Re: Undervolt - My experience 2020/11/23 19:10:24 (permalink)
jenkeeez
can undervolting give better frames ?


No, it gives better temperatures, which shouldn't matter for these cards anyway. Unless, the boost goes higher because of the lower temps, but I haven't heard of this yet.
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R3L3NTL3SS
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Re: Undervolt - My experience 2020/11/23 19:10:37 (permalink)
Are you guys having issues that you're having to undervolt? My 100% stock card gaming boost clocks are 1980+ and my temps are low 60's with fan speeds at only 50-60%. (3080 FTW3)
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TheHyperMatrix
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Re: Undervolt - My experience 2020/11/23 19:16:32 (permalink) ☄ Helpfulby gonsa 2020/11/24 02:23:06
R3L3NTL3SS
Are you guys having issues that you're having to undervolt? My 100% stock card gaming boost clocks are 1980+ and my temps are low 60's with fan speeds at only 50-60%. (3080 FTW3)



Results will vary based on your card.  Some cards need higher voltage to keep the same clocks.  But higher voltage means higher power and more heat which leads to throttling.  So you can start up with a certain clock, then get really hot and start throttling and go down ever more.  You can overcome some of that heat by cranking the fans at 100%, but that uses some of your card's TDP, and some people don't want the extra fan noise.  So sometimes it just becomes easier and more efficient to undervolt and keep a cool, quiet, and stable clock speed.  On my 3090 if I tried going above 0.900v at 1905MHz, heat would creep up to 80C and crash.  And this was with fans at 100%.  At these undervolted settings I'd be able to maintain 55-75C depending on the game.

Need to spamtribute 100 posts for Elite status to be able to get a KingPin because Jacob. My apologies in advance.
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jenkeeez
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Re: Undervolt - My experience 2020/11/24 02:30:41 (permalink)
is there a guide for undervolting ?
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gonsa
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Re: Undervolt - My experience 2020/11/24 02:32:24 (permalink)
jenkeeez
is there a guide for undervolting ?


Check my previous message.

Case: Lian Li OD 11 | Mobo: MSI MAG X570 Tomahawk Wifi | CPU: AMD 3700X | Memory: G.Skill Trident Z Neo 32 GB DDR4-3600 CL16 | Graphics Card: EVGA 3080 FTW3 Ultra | SSD: Samsung 970 Evo 1 TB M.2-2280 NVME | Samsung 860 Evo 500 GB | PSU: SuperNOVA G2 1000W | Sound Speakers: Creative Inspire T3100 | Mouse: Logitech G903 | Monitor: LG 34GN850-B 34.0" 3440x1440 144 Hz
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kandiflippin
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Re: Undervolt - My experience 2021/01/04 14:11:46 (permalink)
What were your temps before undercoating?
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nhorn1983
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Re: Undervolt - My experience 2021/01/04 17:36:03 (permalink)
kandiflippin
What were your temps before undercoating?

his temps will be lower before undercoating... undercoating will cause more heat as it will be trapped
#14
ty_ger07
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Re: Undervolt - My experience 2021/01/04 18:57:18 (permalink)
I think he meant "undervolting".
This discussion is not about undercoating and trapping heat.

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padibuz
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Re: Undervolt - My experience 2021/01/05 03:36:45 (permalink)
Here are my results in terms of undervolting my XC3 Ultra. It seems that compared to results I have seen from other people on this forum, my card is not the best in terms of reaching low voltage and high clocks:
 
- 0.806Mv - 1815Mhz Core / Stable in games / Stable in Port Royal Stress test
- 0.818Mv - 1830Mhz Core / Stable in games / Stable in Port Royal Stress test
- 0.836Mv - 1845Mhz Core / Stable in games / Stable in Port Royal Stress test
- 0.850Mv - 1860Mhz Core / Stable in games / Stable in Port Royal Stress test
- 0.850Mv - 1875Mhz Core / Relatively stable in games, with rare crashes in COD and Cyberpunk / does not finish Port Royal Stress test
- 0.850Mv - 1890Mhz Core / only good to finish a benchmark run, not stable long term in anything.
- 0.887Mv - 1905Mhz Core / Stable in games / Stable in Port Royal Stress test
 
I haven't pushed further because the temperatures go nuts so it's pointless. I'm sure I can achieve close to 2Ghz stable frequencies with lower voltage than stock in order to achieve high benchmark scores, but that is not what I'm after. Stock out of the box the core clock frequency varies like crazy (GPU Boost - temperature related) because of the stupid default fan curve, so together with a custom curve (which caps at 70% fan speed, the highest level of noise I can tolerate from this cooler) gives me the lowest temps/noise without seeing the Core drop to 1745Mhz because the card is pushing 86 degrees and throttles down like crazy. 
 
Unfortunately it took a long time for me to realize 2 things:
- Afterburner does not control my fans properly so I was looking at crazy high temperatures relative to the low voltage I was applying
- X1's voltage curve (which is garbage, btw) does not require me to move all the dots to the same voltage point in order to reach a stable curve. 
 
After that was out of the way, I'm currently sitting at 71 degrees max temp in stress testing, at 0.850Mv, 1860Mhz. 
I have seen people claiming 0.836Mv @ 1890Mhz, but for me that is not doable. 

For reference, here's my curve looks like. 
 
 

Attached Image(s)

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loztb
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Re: Undervolt - My experience 2021/01/05 04:19:57 (permalink)
3080 FTW3 Ultra
Undervolted at 875mV, 11723 in Port Royal.
Average core 1905, memory at 1250, game stable.
 
https://www.3dmark.com/pr/597777

 
 
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gonsa
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Re: Undervolt - My experience 2021/01/05 07:20:52 (permalink)
Now I'm at 950mV at 1965MHz.
Never reach 70c although I have the fans to 100% when reaching 70c.

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kandiflippin
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Re: Undervolt - My experience 2021/01/05 07:35:35 (permalink)
nhorn1983
kandiflippin
What were your temps before undercoating?

his temps will be lower before undercoating... undercoating will cause more heat as it will be trapped

Yeah sorry 😂 undervolting* autocorrect and a busy day at work will keep me from noticing that
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padibuz
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Re: Undervolt - My experience 2021/01/05 11:44:49 (permalink)
Some more information. 
After my post above I decided to try and see how high I can go in terms of voltages, only to find out that of course I had to find the only 3080 in stock with a power limit of 320W. It's so ridiculously low I cannot have sustained clocks of more than 1905Mhz without hitting the power limit and thus, having the card dial the clocks back down. FFS. 
 
So, that being said, 0.868Mv @ 1890hz seems stable (didn't torture test the card yet to see how stable it is) without it hitting the power limit. During a few looped runs of Port Royal I had a split second of the card hitting 321.2W, but on average it's around 300-310W, which keeps it stable, and the core clock doesn't move. I guess I could go a bit higher, because I have about 20W of power I can still use, but that doesn't account for spikes, so I'd rather not ride the power limit every single time the card is under load. 
 
Now, the thing is that neither Afterburner or X1 can be set to a certain voltage - Core Clock and have it stuck there forever. For me, and this is reproducible 100%, if I set a certain voltage (doesn't matter which) the card will start at .015Mv below that target until it hits 54C, and then it goes to the target. After it reaches 61C it jumps 0.15Mv over my target, and from there it fluctuates, but usually sitting where I tell it to sit. 
Usually this wouldn't be a big deal, unless my voltage - core clock setting is right at the edge of stability. In other words, 0.850Mv @ 1875Mhz is stable, but if the ****er jumps to 1890Mhz, where it is not, it crashes. 
 
 
Aaaanyway. 0.868Mv @ 1890Mhz + 500Mhz memory overclock is the max I can achieve without hitting the ridiculous power limit. I have never tried flashing a different vbios on a card before, but by reading these forums it would seem it is the only way to circumvent the stupid power limit and have something closer to 360, or 375W.
It's ridiculous I have to resort to these tricks in order to have the card perform properly. Considering the PCI-E spec, plus the individual 8Pin connector max draw, it's absolutely clear that power draw is not the issue. It's just they just want the XC3 line to "behave" and not go close or over the more expensive FTW line. 
 
Lastly, I was planning to buy a hybrid kit sometime this century when it would be available in Europe, but if the hybrid bios doesn't increase the power limit then...sure, I'll get a cooler card, but also a slower card than your average 3080. 
 
If only I lived in a normal world where I could return the card and get another brand. Ah well. 
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loztb
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Re: Undervolt - My experience 2021/01/08 14:00:07 (permalink)
I decided to go lower (as I have temperature issues, my rig is set up to be all watercooled, but I still didn't manage to find a waterblock for the FTW3 Ultra).
 
Port Royal @ 850mv and highest draw 312W:
https://www.3dmark.com/3dm/56416263

 
Score 11 661 with NVIDIA GeForce RTX 3080(1x) and AMD Ryzen 7 3800X
 
Clock frequency
  • 1 935 MHz (1 440 MHz)
Average clock frequency
  • 1 935 MHz
Memory clock frequency
  • 1 300 MHz (1 188 MHz)
Average memory clock frequency
  • 1 300 MHz
Average temperature
  • 62 °C (60 °C at start of the run, 68 °C at the end, using daily driver fan curve)
#21
03GLI
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Re: Undervolt - My experience 2021/01/15 20:33:36 (permalink)
I just finished my 3 undervolt profiles for gaming and have been testing stability for a week using Superposition benchmark, and Games: RDR2, BL3, Crysis, Crysis 3.
I'm also Using the 500W BIOS.
PC: 6700K @ 4.6ghz, DDR4 3000, PSU Corsair Hx1000i Platinum, Evga 3090 FTW3 Ultra (3fan)
 
here are my results from Superposition 4K optimized benchmark:
 
Out of the box default profile (100% PL, default Fan profile)
1950mhz max @ 1.081v, Low into 1800'smhz
Max Total Watts - 415.7
Max Wats @ PCIe - 65.9
Max Temp - 71c
Max TDP - 99.2%
Perf Cap - None
Score - 16723
 
+669 memory, +120 core, 119% PT, Custom fan curve
2085mhz max @ 1.081v, average 1995-2025mhz, low - high 1800's
Max Total Watts - 495.6
Max Wats @ PCIe - 76.1
Max Temp - 75c
Max TDP - 118%
Perf Cap - Power Limit
Score - 17882
 
All the Blow Profiles Use custom Fan curve and +669 to memory 
Profile 1:
1905mhz @ .881v
Max Total Watts - 380.3
Max Wats @ PCIe - 63.5
Max Temp - 61c
Max TDP - 90%
Perf Cap - None
Score - 17346
 
Profile 2:
1950mhz @ .931v
Max Total Watts - 428.6
Max Wats @ PCIe - 69.9
Max Temp - 65c
Max TDP - 102.1%
Perf Cap - None
Score - 17644
 
Profile 3:
1995mhz @ .981v
Max Total Watts - 469
Max Wats @ PCIe - 73.8
Max Temp - 70c
Max TDP - 111.7%
Perf Cap - None
Score - 17995
 
I also tried messing around with 2100mhz and can achieve it at close to 1.1v, to be 100% stable, also hitting the 500W power limit and temps start to go close to 80c, can be done but not worth it outside of benchmarks.
 
From my testing all of these are stable on my system and the mhz frequency or voltage does not fluctuate or drop after GPU reaches operating temperature.
I'm also using Precision X1 to set the voltage curves, I tested with Afterburner and the curve editing is easier for sure but my saved voltage curves were changing between reboots, and I constantly needed to re-adjust them.
In precision X1 I can control the fans, and my saved voltage curves never change and behave the same even after reboots.
 
below are some pics of the voltage curves and my custom fan curve, if you want to try these out just type in the mhz as shown and hit enter, than drop the nodes after the target voltage to below the target frequency, they do not need to be in a straight line, also for the 1905mhz profile adjust the .881v node 1 point so it hits 1905mhz (default is 1904mhz)
open link in new tab for bigger picture.
post edited by 03GLI - 2021/01/15 20:52:10

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#22
safan80
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Re: Undervolt - My experience 2021/01/15 20:57:43 (permalink)
When did people get their cards? I'd like to know if the binning for undervolting has it's limits on the 3080 ftw ultras.
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Gogod2020
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Re: Undervolt - My experience 2021/01/16 15:54:57 (permalink)
0.850mv 1905mhz stable +500 memory
Max temp: 65c
Max wattage: 319W

Intel Core 10700K, Z490 Aorus Elite AC v.1.0, GSkill 32GB 3000/CL14, EVGA 3080 FTW3 Ultra, Corsair HX1200, Dell S2721DGF, DRP4, Be Quiet SW3 140mm pwm high speed x4, Be Quiet 500DX, Samsung NVME 970 Evo Plus 1TB, Samsung SATA 860 Evo 1TB
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Dabadger84
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Re: Undervolt - My experience 2021/01/16 18:03:14 (permalink)
Undervolting will result in: Lower temps, less power draw, and more consistent clocks, which is why if you're going for around stock clocks with an undervolt, you will get slightly higher scores, because your GPU Core clock is varying less.
 
I'm running my 3090 at an undervolte/OC of 2040MHz @ 1000mV, it also runs 1980MHz @ 950mV with no issues, and temps are several degrees lower than stock, with less power draw, and better FPS/scores in benchmarks and games.  For reference, stock clocks on the 3090 FTW3 Hybrid are in the 1905-1935 range.  So both of those are higher, more stable clocks, with lower voltage.
Looking forward to experimenting with a Kingpin once I get one to see what that thing can do, hoping to get 2100MHz+ without running "stock" voltage for daily use.
 
I've went to exclusively using Afterburner, despite it's fan control offset issue & some other minor bugs, I like having my undervolt load in one click, I occasionally have to reset the clocks because it doesn't work properly, but other than that, it's much less cantankerous than Precision X1.

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supertt
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Re: Undervolt - My experience 2021/01/16 19:11:49 (permalink)
my xc3 hybrid is **** in undervolt.
0.850v / 1815mhz stable in cyberpunk, higher will eventually crash. 
#26
maximus6683
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Re: Undervolt - My experience 2021/01/16 22:00:11 (permalink)
I have a ftw3 ultra 3080 with ryzan 2700x all air
with msi afterburner I have 2100mhhz at 1000mv 9600 memory runs stable on cyberpunk and scores 15550 on superposition 4k optimised
highest temp 71c
still playing with it.
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Dabadger84
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Re: Undervolt - My experience 2021/01/17 10:08:42 (permalink)
supertt
my xc3 hybrid is **** in undervolt.
0.850v / 1815mhz stable in cyberpunk, higher will eventually crash. 



850mV is pretty low, that's why it won't go much higher.  Try 875 or 900, that should net you a decent clock increase, with a minimal increase in temperatures.  I haven't even bothered trying to go that low on my Hybrid 3090 simply because there's no real point when my temps are already pretty great at 1000mV @ 2040MHz.  Never goes above 53-57C in heavy gaming loads, depending on Ambient temp.

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#28
padibuz
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Re: Undervolt - My experience 2021/01/17 10:24:07 (permalink)
Dabadger84
supertt
my xc3 hybrid is **** in undervolt.
0.850v / 1815mhz stable in cyberpunk, higher will eventually crash. 



850mV is pretty low, that's why it won't go much higher.  Try 875 or 900, that should net you a decent clock increase, with a minimal increase in temperatures.  I haven't even bothered trying to go that low on my Hybrid 3090 simply because there's no real point when my temps are already pretty great at 1000mV @ 2040MHz.  Never goes above 53-57C in heavy gaming loads, depending on Ambient temp.


Going higher than that on an xc3 card doesn't give you much in terms of extra performance, because by the time you reach 0.887Mv at around 1900Mhz you will start hitting the nonsensical power limit quite consistently. Not always, depending on load, but enough to not have a stable clock speed.
Higher than that and I becomes a **** show.
#29
recipe7
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Re: Undervolt - My experience 2021/01/18 22:40:03 (permalink)
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.


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