I'm using driver 331.82 and have ~76% GPU use on the 780Ti. Run times are around 24000 seconds but varies from WU to WU. With XP or Linux times go under 20000 seconds, but have not tried that myself. But the card is faster then a GTX680, even with Win7-8-8.1

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Greetings from TJ

Thanks. It looks like we're having similar problems with this card. I've posted a couple times on the "Poor times with 780 Ti" thread.

http://www.gpugrid.net/forum_thread.php?id=3583

Looks like it's not the new driver causing it.

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Matt,

If you do not mind, I would be very curious if your utilization increases if you go and install the 331.82 drivers.

http://www.gpugrid.net/forum_thread.php?id=3634&nowrap=true#35285

This weekend, I will install the 334.89 driver again to ensure I duplicate my previous drop in utilization.

Regards,
Jeremy

Jeremy,

Thank you. I remember reading that post now that I've seen it again - even downloaded them at the time just in case. I'll give it a try tomorrow.

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Got to it a bit early.

After I installed 331.82 I was running fine until tasks in progress completed. One card came back up to full boost with the new task, the other has gone back down to base speeds again with its new task. Both running SANTIs now, about 75% utilization which is just a couple points better than 334.89 as discussed in this thread.

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Driver is 331.82 and OS is Win7 64. Have a Santi running on each 780Ti card. Both cards holding full boost (1187 and 1200). EVGA Precision says utilization is ~75 with low variation (jumping 72-77%).

Install the 334.89 as Clean Install. Reboot, and they come back up and both cards full boost and low variation at ~73 utilization.

Change from Adaptive to Prefer Max Performance, apply, reboot.

Now cards are at 45% utilization with high variation (jumping 40-60%). Cards not full boosting.
Reboot again, and now 73% (low variation).
Reboot again, and now 60% (high variation).
Reboot again, and now 72% (low variation).

Change back to Adaptive.
Reboot again, and now 73% (low variation).
Reboot again, and now 73% (low variation).
Reboot again, and now 73% (low variation).

Change back to Prefer Max
Reboot again, and now 50% (high variation).
Reboot again, and now 65% (high variation).
Reboot again, and now 70% (low variation).

So I think this is an Adaptive vs Max Performance.
Change back to Adaptive.
Reboot again, and now 73% (low variation).
Reboot again, and now 55% (high variation).
Reboot again, and now 60% (high variation).

Change back to Prefer Max
Reboot again, and now 73% (low variation).

Installed the 331.82 drivers with Clean Install which defaults to Adaptive
Back to 75% (low variation)
Reboot again, and now 75% (low variation).

Change to Prefer Max
Reboot again, and now 71% (low variation).

Change back to Adaptive.
Reboot again, and now 73% (low variation).

Not sure what is happening between reboots. Going to leave the 331.82 installed for now for the Win7-64 and 780 Ti cards.

Not sure what is happening between reboots.

When you stop crunching to reboot the GPU cools off. When it's rebooted and crunching again the temperature rises to the temp where the card downclocks to try to keep its temperature down. If you have adequate cooling the temperature will decrease and when it drops below the "magic temp" the clocks boost. If you don't have adequate cooling then the temp will not drop and the clocks will stay at the low speed until you quit crunching and reboot at which time the GPU cools off.

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BOINC <<--- credit whores, pedants, alien hunters

Just got my 780Tis in and running on 334.89. One is running SANTI_MAR at 71 - 73% utilization and the other is running NOELIA_FXA averaging around 79% utilization.

These are my first runs on these cards. Anyone else running on 780Ti with 334.89? I'm curious how my numbers compare. The GPU utilization dropped as compared against the 680 but I think that was to be expected.

I'm also still running CPU tasks at 75%. I checked at 50%, 62.5%, 75% and there does not seem to be an effect on the GPU tasks.

On my W7 rig, running 4 CPU tasks I got ~80% utilization for a SANTI_MAR and ~85% utilization for a NOELIA_FXA on high end GK104 cards. However I noticed that the tasks utilization drifted a bit during the run. At times it was as high as 87% for the NIELIA_FXA and 82% for the SANTI_MAR, but it was also a bit lower (79 & 83).

By varying CPU usage from 50% to 75% I do see some changes, 3 to 5% improvement at a 50% CPU setting in Boinc.

With higher cards it's likely that the WDDM introduces a larger overhead; it's being asked to do more/time. I see it as a bottleneck somewhat akin to the bus issues on a few cards (192bits causes some performance loss with the GTX660Ti, albeit along with cache size) - applied to larger cards it's worse. While you can tweak a GTX660Ti to optimize for performance/Watt, there is little that can be done to prevent the WDDM from interfering AFAIAA.

Jeremy, stop running CPU tasks and see what happens. Either you've found a bug in the driver or its because the CPU is being used. People should try to remember that CPU usage can hinder GPU tasks because the GPU's still need to use the GPU's. The interference varies by CPU application and by GPUGrid task type. Having a web page with video on it constantly refreshing will reduce performance as will screen-savers...

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I have some data on my 780Ti to share.

1) OS is version 16 of 64-bit linux mint cinnamon
2) 3930K on Asus sabertooth x79 MB
3) 1 CPU is "dedicated" to GPUGrid
4) Installed 331.49 drivers a few days back from Nvidia website
5) The last 20 WUs have been Santi and crunch time is under 20,000 seconds

http://www.gpugrid.net/results.php?hostid=166613

6) CPU utilization is about 25%
7) I have coolbits enabled so I can control GPU fan speed manually. Currently the fan speed is set to 65%.

Data from Nvidia Settings (New info like GPU utilization, memory used, PCI bandwith, from this driver release I think). This is a pleasant suprise for me.

1) GPU utilization varies quite a bit but usually from 80-90%
2) As Dagorath mentioned in this thread, if you keep the temp of the GPU well below maximum (82C on this card), the GPU boost clock will remain steady (1006 MHz on this card)
3) Fan speed at 65% which keeps the temp at 73C and thus a steady Max boost clock.

Mt GTX780Ti runs at 70°C at the moment and that is cool for this card, but it runs at 875.7MHz steady, GPU use ate 76% on Win7 5 threads do Rosetta the other 3 are to use by the GPU and other programs.
Occasionally the cards runs a bit faster to 900-915MHz, even when the temperature is higher. Driver is 331.82. It is not as fast as other can do with the same card but at least it runs error free. I will not change anything and buy a second one from EVGA as soon as they are available again. I have now an Asus one.

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Greetings from TJ

When you stop crunching to reboot the GPU cools off. When it's rebooted and crunching again the temperature rises to the temp where the card downclocks to try to keep its temperature down. If you have adequate cooling the temperature will decrease and when it drops below the "magic temp" the clocks boost. If you don't have adequate cooling then the temp will not drop and the clocks will stay at the low speed until you quit crunching and reboot at which time the GPU cools off.

Dagorath, All of these utilizations were right after reboot. The temps were ~45 right at the start. Only let the system run for a couple minutes. The below WU finished last night and you can see all the reboots, driver changes, and the temperature ranges during the testing. The only thing I am trying to understand is why would utilization jump around so much after reboots. It seems "sticky". What ever the reboot sets, is where it stays. Of course I did not let it runs hours and/or finish a WU to see if is stayed at the low utilization. The utilizations that I had reported did not change or have any slope to them while I let the system run for the few minutes. Simply once BOINC started processing (after 30 sec delay), utilization goes from 0 to the number reported and just stayed flat with variation.
http://www.gpugrid.net/result.php?resultid=7844175

Jeremy, stop running CPU tasks and see what happens. Either you've found a bug in the driver or its because the CPU is being used. People should try to remember that CPU usage can hinder GPU tasks because the GPU's still need to use the GPU's. The interference varies by CPU application and by GPUGrid task type. Having a web page with video on it constantly refreshing will reduce performance as will screen-savers...

skgiven, before and after the series of reboots, I tried from 0 to 5 extra CPU tasks (not counting the 2 threads for the GPUGrid tasks), but I could not swing the needle noticeably on the utilization. I am talking as much as a 30% drop in GPU utilization after a reboot, not the single digit differences (if I remember correctly) that you had discussed. Also, it is from reboot to reboot. I will try the reboot series again with 0 extra cpu tasks to isolate it out just in case.[/quote]

In the past there were issues with Prefer Maximum Performance selection, and I think they still exist in XP (you can't set it). It's likely there is an issue again for some GTX780Ti cards. If that's not the case perhaps the clocks/boost are not behaving normally. Are you using a start-up delay?
Jeremy and TJ, you are both using similar processors (i7-477x). Are there any Bios or CPU/bus updates available - just in case this oddity is due to some incompatibility?

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Reading these posts an interesting idea approached me, regarding the lower GPU utilization when set to "maximum performance".

Assume the GPU would switch turbo states quite fast, faster than GPU-Z sees it or the driver reports it. Then it could be that the GPU drops clocks in short periods of low utilization in adaptive mode. Maximum performance would avoid this, stay at high clocks.. and thus report a lower utilization, because there was (briefly) not enough work for the entire GPU anyway.

This would result in similar runtimes for both modes, despite the different utilizations, if the adaptive mode works as it should. And it might increase power draw in maximum performance mode. Both predictions could easily be tested.. to very probably rule this theory out ;)

MrS

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Scanning for our furry friends since Jan 2002

In the past there were issues with Prefer Maximum Performance selection, and I think they still exist in XP (you can't set it). It's likely there is an issue again for some GTX780Ti cards. If that's not the case perhaps the clocks/boost are not behaving normally. Are you using a start-up delay?
Jeremy and TJ, you are both using similar processors (i7-477x). Are there any Bios or CPU/bus updates available - just in case this oddity is due to some incompatibility?

I have not a start delay and have recently update the MOBO BIOS as the USB 3.0 was not working with the Asus factory one.

Indeed Jeremy and I have same CPU (4770-4771), same OS and same settings.
Two differences: I have also a GTX770 in it both from Asus. Jeremy has EVGA.

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Greetings from TJ

Two differences: I have also a GTX770 in it both from Asus. Jeremy has EVGA.

The card manufacturer normally doesn't matter, it'S the same chip and drivers anyway. Your 2nd card will force both of your cards into PCI3 8x, but this has not mattered much before at GPU-Grid, so I doubt it contributes significantly to any runtime differences.

MrS

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Scanning for our furry friends since Jan 2002

I noticed my GTX770 was operating at 1045MHz today (334.89 driver) and 49% GPU Power Usage. When I opened up NVidia Control Panel and went to 3D settings, Power Management Mode was set to Adaptive. I changed this to Prefer Maximum Performance and in MSI Afterburner increased the clock by 78MHz and power limit by 5%. This made no difference to the frequency until I restarted the system. With previous drivers, the changes were immediate. Prior to installing 334.89 I had the Prefer Maximum Performance selected.
I was using an E3-1265L V2 Xeon CPU with the Turbo turned off in the Bios, so I turned Turbo on and allowed the OS to control it. It's now at 3100MHz and I'm running 4 CPU tasks. The GTX770 is now clocked at 1228MHz (17.5% faster than it was), and power usage is 67%.
I found out that the CPU doesn't like fast RAM (didn't work with 2133MHz) but it's a 45W TDP processor and I'm not running anything that needs fast RAM.

Note that after you install a driver NVidia Control Panel settings need to be reconfigured, and now it appears that you have to restart the system for them to stick.
There can also be problems with driver dependent software (such as MSI afterburner), so it's usually a good idea to reinstall these.

I upgraded Boinc this evening and afterwards the GTX770's back to 1045MHz and 50% GPU power!

AFAIC 334.89 is a bad driver. I'm going back to 332.21 and I suggest others do the same if the clocks drop for you too.

Over the last year or so NVidia have done some serious messing around with Power Settings. Whoever is at it, isn't very good at it!

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I'm going back to 332.21 and I suggest others do the same if the clocks drop for you too.

I've come to the same conclusion over the last couple days. I tested 334.89 and 331.82 several times under different conditions (Adaptive vs Max Performance, reboot vs non-reboot between setting changes, clean install vs normal upgrade in GeForce Experience). Finally came back to 332.21 and performance has been rock-solid since. Both cards are at full boost and seem to be staying that way from WU to WU and my temps are even a couple degrees lower compared to 331.82 at the same GPU load. I really liked being able to run extra CPU tasks with 334.89, but it doesn't seem to give reliable performance with the 780Ti. It worked very well with my 680s, so I may use it with those when I get them back into a crunching box.

Of course, now that I've posted this I'm fully expecting things to start acting funny again...

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Hi Matt, I see your times of the 780Ti and am impressed. I have also Win7 but my times are 24000-27000 seconds. The cards runs ate 878.7MHz, Memery clock at 1749.6MHz and 69-70°C (GPU-Z). I run only 5 tasks on my CPU, 2 for GPU and 1 free.
Will you please tell me what you have done to get these times?
Thanks.

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Greetings from TJ

Hi Matt, I see your times of the 780Ti and am impressed. I have also Win7 but my times are 24000-27000 seconds. The cards runs ate 878.7MHz, Memery clock at 1749.6MHz and 69-70°C (GPU-Z). I run only 5 tasks on my CPU, 2 for GPU and 1 free.
Will you please tell me what you have done to get these times?
Thanks.

I'm afraid there isn't much I can tell you. The cards' base clock is 980MHz and when they're at full boost, one runs at 1124MHz and the other at 1137Mhz. I've never had them downclock below their base speed. The base memory on the cards is 7000Mhz but I run in SLI for gaming so the reported memory speed per card is 3500MHz. The cards are typically staying in the 67C - 72C range depending on how warm the room is. I'm currently running CPU at 50% which translates to 3 CPU tasks when also running GPUGrid on 332.21 but I can run at least one more without affecting GPU performance.

The only setting I've changed is "Prefer Maximum Performance" vs the "Adaptive" default power usage in the Nvidia Control Panel.

Jacob Klein started a new thread on maintaining max boost on Kepler cards which looks promising. I've not implemented the technique yet, but I may soon if my performance doesn't stabilize more to my liking.

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I have also set nVidia 3D to Prefer Maximum Performance as that is the advise here, but even when run a few days on Adaptive it doesn't matter I have tried.
We have the same OS, same driver and same temperature but a different clock speed.
Have you a program running like MSI Afterburner, EVGA Precision or one similar?

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Greetings from TJ