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GPU-Z PerfCap Reason behavior...

F

Flying Fish

Joined
May 18, 2019
Messages
39 (0.02/day)
Hi...

I've just upgraded my GPU to an MSI 1660 Ti Gaming X from an MSI 960 Gaming 2GB...

On the old 960 PerfCap Reason was typically Vrel (or sometimes Pwr)...but under load there was always a PerfCap Reason...

On the 1660 Ti the behaviour is...odd...in that PerfCap Reason constantly stays at Idle even though the card is under full load and overclock boosting to 2130 GPU and 1625 memory. I've never seen that before and I don't know if it's normal or possible!

If I drop power limit down to...90 or 80% then PerfCap reason changes to Pwr and the GPU clock obviously drops...

Is this normal behaviour or is it acting a bit odd?

Obviously it's reporting a PerfCap reason if I drop the power but even leaving Power limit at 100% and increasing GPU clock +160mhz to 2130 boosted and +500 on the memory so it's running at 1625, it's still PerfCap Reason Idle which...just doesn't make sense...Power Consumption % is pinned at 98% at W is 130.

Thanks for any help.
 
Hmm good question. Did a quick check, on the RTX 2080 in my work PC it properly switches away from "Idle".

Let me dig out a GTX 1660 Ti
 
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Super, thanks :)

I do like this MSI 1660 Ti Gaming X card but....
The first one I had was only running at PCIe x8. Took that back, got a replacement and then have this PerfCap shenanigans...

If it isn't right I don't know if I should try again...
 
Flying Fish said:
If it isn't right I don't know if I should try again...
Click to expand...

If the performance is where it should be, what does it matter if GPU-Z isn't reading PerfCap correctly?
 
Flying Fish said:
Is this normal behaviour or is it acting a bit odd?
Click to expand...
Sorry for the delay. Confirmed, this is the normal behavior, a bit strange indeed.
 
Thanks very much for checking :) At least I know my card is behaving normally now...

I've done some head scratching and testing since I posted and I saw in MSI Afterburner...

Temp limit, Power limit and Voltage limit are all 0 and No load limit is 1. If I drop power limit down to...90 or 80%, No load limit drops to 0 and Power limit goes to 1....this basically matches what I see in GPU-Z...so rather than an issue with GPU-Z it seems to be an issue with the card reporting.

It seems it may be something with MSI cards as I've done some googling around and found screenshots of several MSI ards with strange perfcap readings looking at the load on the card, including a 2080


But a couple of screenshots from other brand cards look...fairly normal


Although the only perfcap reason i've seen anywhere on a 1660 Ti is Pwr...
 
Flying Fish said:
It seems it may be something with MSI cards
Click to expand...
Board partners have no control over perfcap, NVIDIA has locked that tight.

Flying Fish said:
Although the only perfcap reason i've seen anywhere on a 1660 Ti is Pwr...
Click to expand...
Stop the fan with your fingers and put some load on the card, should see "Thrm" at some point

Did a quick test with ASUS GTX 1660 Ti STRIX, same behavior, always "idle" and "pwr"

W1zzard said:
Stop the fan with your fingers and put some load on the card, should see "Thrm" at some point
Click to expand...
I tested this for you, works as expected
 
Hmm ok then, thanks for that...

Still, it's pretty strange that it doesn't get a PerfCap Reason when running furmark or GPU-Z render test...I've done +800 on memory and +150 on core and i still haven't managed to get it to hit Pwr perfcap reason...

It leaves me scratching my head a bit since at stock it starts at 1995mhz and then drops to 1985 then 1965...without displaying a perfcap reason which makes little sense to me, if there's something causing it to throttle back, even slightly, you'd think there would be a reason...

Anyways, thanks for your help :) Glad I know my card is fine!
 
Hi, having the same issues with my Asus strix 2070 super A8G. During load perfcap reason is IDLE, while no load perfcap reason is PWR. Everything seems to be running fine. Any chance W1zzard can confirm this?
 
That is strange, and clocks are correct in idle and load?
 
Doesn't Idle mean that no limits are being hit?
 
Looks normal indeed. No idea
 
Still within exchange period. Should I just grab another card because of this? Or just leave it be?
 
Now that I am at my own computer, I tend to have Afterburner monitoring graphs on second screen. Names in Afterburner are a bit better - No load, Voltage, Power and Temp limits. No load/Idle is True when none of the other limits have been triggered, once some other limit triggers, No load/idle is False.

When GPU load is not maxed, it is common enough that No load/idle is still set. Basically at this point there is still some reserve performance available.
 
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Thanks, here are some pics for reference.
 
Your pics do not work. Use a common image hosting site, not another forum we have no access to.
(or use the Attach files button)

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Tinypic was great too, but seems it died in Sept 2019. RIP Tinypic! :(
 
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gpu.gif




Capture.PNG


Sorry, still learning! Lmk if these pictures are showing. Thanks.
 
Yep! :) All fine now, thanks. You are welcome.
Let's see what londiste and @W1zzard say now.

EDIT: By the way, welcome to the TPU Forums! :) Hope you like it here. ;)
 
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I have no further ideas, try opening a ticket at Nvidia customer support, maybe something interesting comes out of it. They do reply fairly quickly
 
Oh, I was not looking at the clocks, concentrating on the Idle while load part. 300MHz core and 100/400MHz VRAM clocks should be deep idle, usually with monitor(s) on standby. I am seeing power limit getting triggered in that state as well. This should not be a concern, probably a side effect of how exactly Nvidia managed idle clocks.
 
My 2070 SUPER does this when I have OCed even just a little bit past these values...

+120 MHZ Core Clock
+200 MHZ Memory Clock

Almost constant perfcap reason of "Power"
My GPU BIOS is locked at %100 Power Limit, cannot adjust that setting at all.
 
Thanks guys, everything is running great and really enjoying this card. Coming from a GTX 960!
 
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