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Why Is My Nvidia 760 Sometimes Downclocking During Play? (Can This Be Turned Off?)

post #1 of 5
Thread Starter 
Hello, and thanks for reading. If you're someone who cares little for reading longer posts, feel free to skip to the highlighted main question below.

I recently purchased an Nvidia 760 GTX (MSI 760 OC Twin Frozr, to be specific), and so far I love the card (strong performance, great temps, silent). However, when monitoring with MSI's Afterburner, I've noticed that the card's clocks fluctuate. This usually happened when going from a graphics-intensive "3D" application (i.e., game) to "2D" (desktop, internet, etc.), so I figured it was just a handy power saving feature that would "know" when I need max clock and boost. (By the way, using the card in official "OC mode" of 1085 core, 1502 mem, 1150 boost, though the actual boost (max clock) seems to run at 1215 per GPU-Z).

And while I was playing the particularly GPU-thirsty Far Cry 3, GPU utilization was always near max and the card was constantly at the 1215 max (so far, so good). However, I recently switched to the older and less intensive Assassin's Creed II, and the card is rarely maxed. In fact, it's running well below the 1085 core (typically maxing at 1019, but running at less, like in the 700s or below). For the most part this is fine, since even at those clocks, I'm staying right at 60 FPS, which seems to be a kind of limit in Assassin's Creed II. (Is this due to my having the V-sync on?). But there was a brief moment, when I was looking out into the distance in game when frames dropped below 30, and the GPU didn't seem to respond by kicking the core upward.

Is this an issue of some kind or just the minor shortcomings of a power saver mode (if that is, in fact, what is driving the fluctuation)? If I wanted to run at the boost level (again, 1215 MHz) constantly whether the application needs it or not — force it, in effect — can I, and how?

And, just to clear up one potential question, temps are definitely not driving the downclocking/fluctuations. Even at max GPU load in full boost for hours the card runs at 60C or below, and that's not close to 100% fan. In short, cooling is not a concern with this card.

Thanks so much for reading. I appreciate any input/insight you can offer.

- ELB
post #2 of 5
normal power save--if you want to run at max all the time I believe you can go into nvidia control panel or nvidia inspector and change power management from adaptive to max performance. going from memory here but believe those are the settings.

edit : and yes, vsync will limit your fps.
Edited by nasmith2000 - 8/24/13 at 8:12am
mines
(22 items)
 
[old] setup
(7 photos)
CPUMotherboardGraphicsRAM
5960x @ 4.5 (1.275) asus x99 deluxe 2x evga gtx 980ti sli 16gb corsair dominator lpx 3000mhz 
Hard DriveHard DriveHard DriveHard Drive
840pro (256gb) windows 10 850 evo (500gb) steam vertex 4 (256gb) x-plane 10 ssdnow (90gb) itunes, spotify, misc user folders 
Hard DriveHard DriveOptical DriveCooling
wd black (2tb) storage, games usb drives: samsung (2tb), wd (1.5tb), seagate ... lg 14x bd-r corsair h105 
CoolingOSMonitorKeyboard
lamptron fc5v2 windows 10 dell u3415w gigabyte aivia osmium 
PowerCaseMouseAudio
antec 1300w silverstone tj07 razer taipan onboard realtek  
AudioOther
klipsch thundermaster hotas warthog 
  hide details  
Reply
mines
(22 items)
 
[old] setup
(7 photos)
CPUMotherboardGraphicsRAM
5960x @ 4.5 (1.275) asus x99 deluxe 2x evga gtx 980ti sli 16gb corsair dominator lpx 3000mhz 
Hard DriveHard DriveHard DriveHard Drive
840pro (256gb) windows 10 850 evo (500gb) steam vertex 4 (256gb) x-plane 10 ssdnow (90gb) itunes, spotify, misc user folders 
Hard DriveHard DriveOptical DriveCooling
wd black (2tb) storage, games usb drives: samsung (2tb), wd (1.5tb), seagate ... lg 14x bd-r corsair h105 
CoolingOSMonitorKeyboard
lamptron fc5v2 windows 10 dell u3415w gigabyte aivia osmium 
PowerCaseMouseAudio
antec 1300w silverstone tj07 razer taipan onboard realtek  
AudioOther
klipsch thundermaster hotas warthog 
  hide details  
Reply
post #3 of 5
Kepler GPUs will downclock if the 3d application isn't using the 100% GPU load. I can guarantee in AC2 that you will only be using a small percentage of the actual GPU power, because AC2 is not a demanding game. Kepler does not use more GPU horsepower than it needs to, so if you're locked at 60 fps - it will downclock for power savings. This is normal behaviour; kepler does not use more GPU power than it requires. If you're seeing strange behavior in this respect, be sure to set power management to "maximum performance" instead of "adaptive" in the nvidia control panel.

OTOH, if you're playing a super demanding game like Metro Last Light it generally will not downclock unless you exceed the allowable temperature or TDP headroom, and then it will downclock in 13mhz increments.
Edited by xoleras - 8/24/13 at 8:47am
post #4 of 5
Thread Starter 
Thanks to you both (nasmith and xoleras) for your replies — you answered my questions in full. I consider the matter resolved.

Very much appreciated!
post #5 of 5
no problem! glad to help! wink.gif
mines
(22 items)
 
[old] setup
(7 photos)
CPUMotherboardGraphicsRAM
5960x @ 4.5 (1.275) asus x99 deluxe 2x evga gtx 980ti sli 16gb corsair dominator lpx 3000mhz 
Hard DriveHard DriveHard DriveHard Drive
840pro (256gb) windows 10 850 evo (500gb) steam vertex 4 (256gb) x-plane 10 ssdnow (90gb) itunes, spotify, misc user folders 
Hard DriveHard DriveOptical DriveCooling
wd black (2tb) storage, games usb drives: samsung (2tb), wd (1.5tb), seagate ... lg 14x bd-r corsair h105 
CoolingOSMonitorKeyboard
lamptron fc5v2 windows 10 dell u3415w gigabyte aivia osmium 
PowerCaseMouseAudio
antec 1300w silverstone tj07 razer taipan onboard realtek  
AudioOther
klipsch thundermaster hotas warthog 
  hide details  
Reply
mines
(22 items)
 
[old] setup
(7 photos)
CPUMotherboardGraphicsRAM
5960x @ 4.5 (1.275) asus x99 deluxe 2x evga gtx 980ti sli 16gb corsair dominator lpx 3000mhz 
Hard DriveHard DriveHard DriveHard Drive
840pro (256gb) windows 10 850 evo (500gb) steam vertex 4 (256gb) x-plane 10 ssdnow (90gb) itunes, spotify, misc user folders 
Hard DriveHard DriveOptical DriveCooling
wd black (2tb) storage, games usb drives: samsung (2tb), wd (1.5tb), seagate ... lg 14x bd-r corsair h105 
CoolingOSMonitorKeyboard
lamptron fc5v2 windows 10 dell u3415w gigabyte aivia osmium 
PowerCaseMouseAudio
antec 1300w silverstone tj07 razer taipan onboard realtek  
AudioOther
klipsch thundermaster hotas warthog 
  hide details  
Reply
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