perfcap reason vrel что это

Perfcap reason fluctuates between power util and vrel under load

Master

I need to say that my former GTX980 (g1 gaming as well) did not have this problem. the load was constantly at 97 to 99% and I used to get Vrel/util most of the time and nothing else.

Any help is greatly appreciated

jboydgolfer

My guess would be that it’s the driver or the bios of the card throttling it’s power and/or temperature. It’s protecting the card so it doesn’t overheat

For this reason I edited my 970 to have expanded power and temperature limits

Master

My guess would be that it’s the driver or the bios of the card throttling it’s power and/or temperature. It’s protecting the card so it doesn’t overheat

For this reason I edited my 970 to have expanded power and temperature limits

newtekie1

Semi-Retired Folder

Util: Limited by GPU Utilization

This means the GPU is idle. This isn’t throttling, it means the GPU is waiting for work to do.

If it was throttling due to temperature it would say Thrm. If it was throttling due to the power limit it would say Pwr.

jboydgolfer

Util: Limited by GPU Utilization

This means the GPU is idle. This isn’t throttling, it means the GPU is waiting for work to do.

If it was throttling due to temperature it would say Thrm. If it was throttling due to the power limit it would say Pwr.

Master

Util: Limited by GPU Utilization

This means the GPU is idle. This isn’t throttling, it means the GPU is waiting for work to do.

If it was throttling due to temperature it would say Thrm. If it was throttling due to the power limit it would say Pwr.

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perfcap reason pwr

Franckette

P4-630

Kursah

Super Moderator

Welcome to TPU!, hopefully we can help you resolve your issues but first we need more information from you.

newtekie1

Semi-Retired Folder

Give us a screen shot of GPU-Z’s sensor tab too.

The PWR perfcap reason means the GPU is hitting the Power Consumption limit.

Franckette

I’ve
System Name: Laptop Alienware m 17x R4 Win 7
Processor: Intel(R) Core(TM) i7-3610QM CPU @ 2.30GHz
Memory: 12.0 Go
Video Card(s): GTX 780M
Hard Disk(s): SAMSUNG SSD PM830 mSATA 64GB

Before this month i’ved some crashs and freezes (only in games like Fallout 4)
And i’ve low fps when i do a Furmark but not with Benchmark.
In Gpu-Z in percap reason there is writting Pwr and the bar become green.

I’ve the laster driver.

This is a sreen shot

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Mindweaver

Moderato®™

@Franckette welcome to TPU. Also, in the future don’t double post. If you need to add something, just edit your last post. Thanks!

EDIT: You can go over our Forum Guidelines here.

Vellinious

I’ve
System Name: Laptop Alienware m 17x R4 Win 7
Processor: Intel(R) Core(TM) i7-3610QM CPU @ 2.30GHz
Memory: 12.0 Go
Video Card(s): GTX 780M
Hard Disk(s): SAMSUNG SSD PM830 mSATA 64GB

Before this month i’ved some crashs and freezes (only in games like Fallout 4)
And i’ve low fps when i do a Furmark but not with Benchmark.
In Gpu-Z in percap reason there is writting Pwr and the bar become green.

I’ve the laster driver.

This is a sreen shot

You’re hitting the power limit perf cap there. As temps increase, so does voltage and heat. as voltage goes up, so does the required power. When you hit the power limit prescribed in the bios for the GPU, it will throttle the core and voltage to bring it back down where it should be.

A couple of things might help, assuming you can use Afterburner or PrecisionX on a mobile GPU.

1. Create a custom fan curve to keep the GPU cooler
2. Increase the power limit slider in MSI AB / EVGA PCX

jmcslob

Vayra86

One more point. Do NOT run Furmark any more. This may have already contributed to the lacking performance or accelerated wear on the cooling solution. If you do increase the power limit slider of this card, this will also increase temperatures further, in turn causing more throttling. I wouldn’t recommend this.

In the end, this is why I hate gaming laptops.

eidairaman1

The Exiled Airman

Needs a good cleanout, possibly a good thermal compound job on the cpu and gpu, mobo chipset.

Other thing, perhaps a bigger brick, other things, lower resolution and detail levels for smoother gameplay, it uses a Mobility gpu which are tailored for power sipping not running full out.

This being a laptop there really isn’t a whole lot out there to OC that cpu

newtekie1

Semi-Retired Folder

This isn’t a heat issue, I’m not sure why people are thinking it is. There is a completely different Perfap reason for heat, it would be coming up Thrm if the GPU was hitting the thermal limit.

Yes, don’t run furmark, it isn’t an accurate test for power throttling. It basically causes the card the power throttle immediately.

Run something like Unigine Heaven in a window with GPUz running and take a screen shot of the sensors tab.

Vellinious

This isn’t a heat issue, I’m not sure why people are thinking it is. There is a completely different Perfap reason for heat, it would be coming up Thrm if the GPU was hitting the thermal limit.

Yes, don’t run furmark, it isn’t an accurate test for power throttling. It basically causes the card the power throttle immediately.

Run something like Unigine Heaven in a window with GPUz running and take a screen shot of the sensors tab.

newtekie1

Semi-Retired Folder

Temps have nothing to do with this issue. The GPU is running well within the temps it should be, it is not getting anywhere near hot enough to cause a noticeable loss in efficiency. And the GPU would be thermal throttling and would probably shut down before the temperature would be high enough to cause an increase in power draw.

What is more likely is that something is lowering the Power Limit(MSI Afterburner for instance lets you drop the power limit to 50%), or the power sense circuit on the GPU is starting to go wonky.

Vellinious

Temps have nothing to do with this issue. The GPU is running well within the temps it should be, it is not getting anywhere near hot enough to cause a noticeable loss in efficiency. And the GPU would be thermal throttling and would probably shut down before the temperature would be high enough to cause an increase in power draw.

What is more likely is that something is lowering the Power Limit(MSI Afterburner for instance lets you drop the power limit to 50%), or the power sense circuit on the GPU is starting to go wonky.

I think if you look at the sensors tab screenshot there, you’ll see exactly what I’m talking about. It’s idling at around 50c, load temps are much higher. As temps increase during load, you’ll also notice voltage increasing until it hits the power limit perf cap, at which time it throttles. temps, clock and voltage drops, and then returns to normal, and then throttles again.

As I stated. increasing the power limit in AB may alleviate the issue, but creating a custom fan curve to keep the GPU cooler under load certainly can’t hurt that either.

I will also concede, that something could be «wonky». But before resorting to the conclusion that the GPU is just broke, I’d try the alternatives that I listed.

Franckette

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P4-630

I do see some green in the GPU-Z screenshot though.

But as long as you can run everything again without huge fps drops you’re fine then.

Happy Gaming!!

Franckette

newtekie1

Semi-Retired Folder

I looked at the screenshot before I posted. I don’t not see what you are talking about.

Idle temperature means nothing. This is a laptop, idle temps will be high because the fan is likely turned off at idle. And the load temps are not going up that high. Judging by the graph they look like thy are getting up into the 70°C range. I can guarantee the temp is staying below 82°C, because that is the thermal throttle temperature, and the GPU isn’t thermal throttling.

That isn’t how it works, at least not noticeably. The voltage on the GPU doesn’t go up because of the temperature. The voltage goes up because the driver is telling the voltage regulator to increase the voltage to keep the GPU stable at the higher clock speeds.

Yes, if temperatures get really high, then the efficiency will go down and the power draw will increase. However, silicon has to get really really hot for this efficiency to matter to the point that the card would throttle due to the power limit. In fact, the temperature would have to be so high, the GPU would already be throttling due to the temperature. We aren’t seeing thermal throttling in the sensor tab, so temperature is not an issue.

As I stated. increasing the power limit in AB may alleviate the issue, but creating a custom fan curve to keep the GPU cooler under load certainly can’t hurt that either.

I will also concede, that something could be «wonky». But before resorting to the conclusion that the GPU is just broke, I’d try the alternatives that I listed.

Going on a wild goose chase trying to solve a temperature issue that doesn’t exist just wastes time that we could be using trying to solve the actual issue.

Yes, increasing the power limit in MSI Afterburner is the first thing I would try too. Heck, it or a program like it might be what is causing the issue.

I’d also do a clean driver install.

Vellinious

I looked at the screenshot before I posted. I don’t not see what you are talking about.

Idle temperature means nothing. This is a laptop, idle temps will be high because the fan is likely turned off at idle. And the load temps are not going up that high. Judging by the graph they look like thy are getting up into the 70°C range. I can guarantee the temp is staying below 82°C, because that is the thermal throttle temperature, and the GPU isn’t thermal throttling.

That isn’t how it works, at least not noticeably. The voltage on the GPU doesn’t go up because of the temperature. The voltage goes up because the driver is telling the voltage regulator to increase the voltage to keep the GPU stable at the higher clock speeds.

Yes, if temperatures get really high, then the efficiency will go down and the power draw will increase. However, silicon has to get really really hot for this efficiency to matter to the point that the card would throttle due to the power limit. In fact, the temperature would have to be so high, the GPU would already be throttling due to the temperature. We aren’t seeing thermal throttling in the sensor tab, so temperature is not an issue.

Going on a wild goose chase trying to solve a temperature issue that doesn’t exist just wastes time that we could be using trying to solve the actual issue.

Yes, increasing the power limit in MSI Afterburner is the first thing I would try too. Heck, it or a program like it might be what is causing the issue.

I’d also do a clean driver install.

1. Then you’re blind

2. Idle temps are the baseline, and it’s clear that as the graph goes up in temps, so does the voltage. Correlation in this case, does equal causation.

5. The one thing we agree on, as well as the driver install

I’ll agree to disagree. I would rather try to set a custom fan curve to help the power limit, and set a higher power limit, than just automatically assume the GPU is just jacked up. Better to at least research all options before jumping to that conclusion, but. according to what you’re saying, just wing it, and go right to, «uh, it’s broken». I’m sincerely sorry, but, that’s just stupid beyond reason.

eidairaman1

The Exiled Airman

Aquinus

Resident Wat-man

That isn’t how it works, at least not noticeably. The voltage on the GPU doesn’t go up because of the temperature. The voltage goes up because the driver is telling the voltage regulator to increase the voltage to keep the GPU stable at the higher clock speeds.

Yes, if temperatures get really high, then the efficiency will go down and the power draw will increase. However, silicon has to get really really hot for this efficiency to matter to the point that the card would throttle due to the power limit. In fact, the temperature would have to be so high, the GPU would already be throttling due to the temperature. We aren’t seeing thermal throttling in the sensor tab, so temperature is not an issue.

I’m going to refute this one. Temperature itself does not increase power draw however, heat does impact how quickly a transistor can switch states which is the real thing that needs to be considered. It’s not unrealistic that nVidia GPUs factor temperature in when determining what voltage to use. There are only two ways to make a transistor switch faster which is a higher driving voltage or lower operating temperature. Also, ohm’s law states that when resistance is constant that V ∝ I so any increase in voltage will have a corresponding increase in current and heat produced is a function of the square of the current.

So, temperatures might be reasonable but, increased driving voltage will increase current draw and if temperatures are reasonable, could mean that a power limit would be hit before a temperature limit but, that isn’t to say that temperature doesn’t factor into the equation even if it’s not the limiting factor.

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