We clearly have tools that allow overclocking GPU's in Linux. And controlling fans speeds. But what about under voting Nvidia GPU'S in Linux?
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
you can indirectly alter the voltage with the power limit function. Setting the power limit lower will force the GPU to run lower voltage, but you can’t really control exactly how much or at what point the card ends up pulling back voltage or core clocks.
I’ve never felt that power limiting wasn’t good enough though.
A solid case can be made that a Titan V is more "efficient" (uses less electricity for a given level of production) than a EVGA rtx 3080 ti. But what happens to the rtx 3080 ti's production if you were to power limit it to say 200 watts?
My Titan V's are running ~150 watts or less. If I can get the equivalent production at 200 watts on my rtx 3080 ti running the same number of threads....
Experiment has started.
Preliminary results seem to indicate I can get ~2.3M RAC or maybe higher. So from a cost of electricity vs. results POV this is looking very encouraging. The graphics clock is not nearly as stable as the Titan V clocks seem to be but otherwise it appears to be crunching right along. And I don't have to buy a Titan V to get the results.
Tom M
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
A solid case can be made that a Titan V is more "efficient" (uses less electricity for a given level of production) than a EVGA rtx 3080 ti. But what happens to the rtx 3080 ti's production if you were to power limit it to say 200 watts?
My Titan V's are running ~150 watts or less. If I can get the equivalent production at 200 watts on my rtx 3080 ti running the same number of threads....
Experiment has started.
Preliminary results seem to indicate I can get ~2.3M RAC or maybe higher. So from a cost of electricity vs. results POV this is looking very encouraging. The graphics clock is not nearly as stable as the Titan V clocks seem to be but otherwise it appears to be crunching right along. And I don't have to buy a Titan V to get the results.
Tom M
Last I ran O3AS, it was producing close to 3.4M RAC at 174W average board power with single VII. I think it can do 3M RAC at 150W but I haven't tried it out yet.
Your making a case for jumping to a Radeon VII. My fallback was another Titan V.
Sigh.
At least the outside temperatures have fallen.
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
Your making a case for jumping to a Radeon VII. My fallback was another Titan V.
Sigh.
At least the outside temperatures have fallen.
Keep in mind, pututu’s results were with a 7950x CPU that wasn’t running any other CPU work. You won’t get the same result with your slower EPYC CPUs and running CPU work on them too
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
Certainly not taking 4 times or even twice as long for each task!!
I was running 5 tasks on the GPU. Now I am running 4 tasks. The graphics clock may now be averaging above the graphics clock speed reported on the Titan V's. A widely varying graphics clock is the most visible difference between a 200 watt power limit and a 300 watt power limit.
I believe I am getting a 2M+ RAC average. So I am a net winner for this experiment.
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
We clearly have tools that
)
We clearly have tools that allow overclocking GPU's in Linux. And controlling fans speeds. But what about under voting Nvidia GPU'S in Linux?
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
Voltage controls taken out of
)
Voltage controls taken out of nvidia-smi (I believe by Nvidia) some time ago.
You can’t directly control
)
You can’t directly control voltage in Linux.
you can indirectly alter the voltage with the power limit function. Setting the power limit lower will force the GPU to run lower voltage, but you can’t really control exactly how much or at what point the card ends up pulling back voltage or core clocks.
I’ve never felt that power limiting wasn’t good enough though.
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Tom M wrote: A solid case
)
Preliminary results seem to indicate I can get ~2.3M RAC or maybe higher. So from a cost of electricity vs. results POV this is looking very encouraging. The graphics clock is not nearly as stable as the Titan V clocks seem to be but otherwise it appears to be crunching right along. And I don't have to buy a Titan V to get the results.
Tom M
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
Tom M wrote:Tom M wrote:A
)
Last I ran O3AS, it was producing close to 3.4M RAC at 174W average board power with single VII. I think it can do 3M RAC at 150W but I haven't tried it out yet.
Pututu, Your making a case
)
Pututu,
Your making a case for jumping to a Radeon VII. My fallback was another Titan V.
Sigh.
At least the outside temperatures have fallen.
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
Tom M wrote:Pututu,Your
)
Keep in mind, pututu’s results were with a 7950x CPU that wasn’t running any other CPU work. You won’t get the same result with your slower EPYC CPUs and running CPU work on them too
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Ian& SteveC,Thank you for
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Ian& SteveC,
Thank you for the reminder. Just for giggles I am starting a 4x test at 200 watts power limit.
System
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!
Tom M wrote: Ian&
)
Certainly not taking 4 times or even twice as long for each task!!
mikey wrote: Tom M
)
I was running 5 tasks on the GPU. Now I am running 4 tasks. The graphics clock may now be averaging above the graphics clock speed reported on the Titan V's. A widely varying graphics clock is the most visible difference between a 200 watt power limit and a 300 watt power limit.
I believe I am getting a 2M+ RAC average. So I am a net winner for this experiment.
A Proud member of the O.F.A. (Old Farts Association). Be well, do good work, and keep in touch.® (Garrison Keillor) I want some more patience. RIGHT NOW!