I thought the 780Ti would be a lot faster then a GTX 770, but it is only ~3000 seconds faster, on Win7.
Your card is about 7000 seconds faster then mine due to XP.

You know the source of the difference: it's the operating system, not the card. There's no such tweaking of the card which could compensate the loss caused by the OS. Also, there's no way for the user to change the way the OS access the hardware it's running on, because it is the job (the main purpose and the characteristic) of the OS. The users wanted to have less BSODs, and system restarts, they got it with WDDM, but with that comes its overhead, which is bad for us, especially for the recent SANTI workunits, which interact with the CPU more than the NATHAN_KIDKIX workunits.

What I would like to achieve is to be that the 780Ti is a bit faster.

I'm sorry to say that, but you have to change the OS.

I will try Linux but don't have not a lot of confidence yet.

This is a good idea, but I can't help you with that, as I don't use Linux, and I don't have any experience with Linux. But there are a lot of other crunchers who could (and will) help you.

If you have some tips/idea's I could try. I would be grateful.

If this is a dedicated cruncher PC, you can have WinXPx64 on that.
But...
Maxwell GPUs will have a dedicated (ARM) CPU on chip, thus the WDDM could be eliminated - so those GPUs will be much faster under Win7 than the Keplers. We don't know their release date and their specifications yet, and we don't know how long it would take to make the ACEMD client to work with them, but Maxwell's architecture could be the solution for your problem. Until then, you should use a different OS.

Hi Zoltan,

You are right again :)
Indeed I have tried all I could and got the core clock steady at 980MHz, even managed to get it to 1045, but the GPU load is around 74% with Santi's, and 10% higher with Noleia's and Nathan's.

I will start experimenting with Linux first, and wait with investment in new cards until that works smooth or the Maxwell's arrive.
Your advice was of great help.

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Greetings from TJ

With the Noelia FXArep WU's my 780Ti is approximately 5000 seconds faster than a Santi WU on Windows7!
So it is not only the WDDM that slows down the card of cards it is also a bit of programming. Noeilia does that great. The 780Ti runs at 82% reaches 85% GPU load at times (Santi only 77%) and at 72-74°C.

With Win7 I can use the iGPU for Einstein with Linux an iGPU is useless at the time (if I have read correct).

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Greetings from TJ

You need to compare like for like Work Units on each operating system. At present my W7 system is using 81% and 86% of the GPU's while running a Santi and Noelia WU respectively, on a GTX770 and a GTX670. Thus Noelia's present WU's better utilize the GPU by 6%. The runtimes will vary for many different reasons (size, complexity, PCIE dependency...). Interestingly Noelia's WU's at one time struggled to get anywhere near 70% GPU utilization, and didn't use the CPU fully! Now they do use a 'full' CPU core/thread and do utilize much better.
Last time I checked like for like WU's on an identical system and W7 vs Linux, I found that a GTX770 was 12.5% faster on Linux. I expect it would be slightly different for different computer architectures (hardware; CPU, Chipset...), but I expect that this may not quite be linier; so the better the card the larger the gap. So the OS difference for a GTX650 might just be 10% while for a GTX680Ti it could be 15%. This would really need to be tested on different hardware, and a 5% difference might be hard to spot, so trying to work this out with just 670's and 770's would just be guesswork.

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Hi I have this graphics card running on Windows 8.1 64 bit, Gigabyte GeForce GTX 780 Ti WindForce 3X OC.
All tasks short or long in Seconds after the initiation of counting ,they fall .. I have the latest drivers,update, etc. ..
The same problem I have also another type of BOINC projects on 55 cuda. Other boincprojects going on 50 cuda working normally.
interesting is the second PC where there are 3 Nvidia GTX 680, the basic version, not OC versi. These work normally while. also the same windows and drivers.
What to do to give me my 780 Ti start counting tasks.?

Hi I have this graphics card running on Windows 8.1 64 bit, Gigabyte GeForce GTX 780 Ti WindForce 3X OC.
All tasks short or long in Seconds after the initiation of counting ,they fall .. I have the latest drivers,update, etc. ..
The same problem I have also another type of BOINC projects on 55 cuda. Other boincprojects going on 50 cuda working normally.
interesting is the second PC where there are 3 Nvidia GTX 680, the basic version, not OC versi. These work normally while. also the same windows and drivers.
What to do to give me my 780 Ti start counting tasks.?

I had the same the problem with my same type of card.
I've started a thread about it, but the solution is that:
You have to lower the card's memory clock to 2700MHz. You can do it by the following steps:
1. read the BIOS with GPU-Z
2. modify the BIOS with Kepler BIOS tweaker 1.26 (you have to log in to download the zip file at the end of the post)
3. flash the BIOS with nvflash

Or just edit the GPU memory clock in software and see if it helps. If it does, you can set this automatically upon boot. Well.. actually, if the GPU memory can't function error-free at specified frequency that would be a reason for an RMA. And if the next card also can't do it maybe nVidia pushed memory clocks too high.

@TJ: on POEM, folding@home and possibly other projects the complete 331 / 332 driver branch is significantly slower than the previous version, we're talking about ~15% here. That's why I'm "still" using 327.23. Not sure if this one already supports GK110 on GPU-Grid. If so you might want to give this one a try. I haven't read anything about similar driver problems here, but I have been busy otherwise the last months or so.

MrS

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Scanning for our furry friends since Jan 2002

@TJ: on POEM, folding@home and possibly other projects the complete 331 / 332 driver branch is significantly slower than the previous version, we're talking about ~15% here. That's why I'm "still" using 327.23. Not sure if this one already supports GK110 on GPU-Grid. If so you might want to give this one a try. I haven't read anything about similar driver problems here, but I have been busy otherwise the last months or so.
MrS

Thanks for your input ETA. Indeed I missed your suggestions/comments for a while.

I did try it with lower drivers, but then the 780Ti didn't work. Not sure if it was the 327.23 so I will try that one next time the rig needs booting due to Windows updates.

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Greetings from TJ