nvidia launches tesla k40, overview by Ryan Smith.

Ignoring reality (the hiked up $5500 off the shelf price tag), the design expands potential; Boost is 19.5% faster than a K20 (no boost), it has twice the memory (12GB), faster GDDR, an additional 192 shaders and with the help of the new B1 stepping and binning, it's still a 235W model.
The performance boost in apps over the K20 seems to range from 11% to 25% but could be as high as 28%. The K40 is PCIE3 (unlike the K20 which is PCIE2). This eliminates some bottlenecks for some applications, but unless it scales much better on the newer Xeon processors there is still going to be some drop off.
Obviously the 5TFlops GTX780Ti is the best card for here, but the K40 offers versatility at a high performance level and opens up more R&D avenues.

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Since the K40 is significantly lower clocked than GTX780Ti, it's no wonder it's "only" got a 235 W TDP.. considering GTX780Ti has a 250 W TDP. Aprart from the additional memory and it being ECC (which can mean the world to some) the feature that really sets these cards apart is the massive FP64 performance.

MrS

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Scanning for our furry friends since Jan 2002

Yes, when you compare the K40 to a 780Ti (the best GPU for here), but when you compare the K40 to its predecessor (the K20) what's noteworthy is that it's PCIE3 complaint, the potential performance improvement is 28%, and what's outstanding is the 12GB GDDR5 (Rendering, Fluid Dynamics and Seismic Analysis...). Considering the GPGPU has more cuda cores, is clocked higher, has Boost, faster RAM and twice the amount of RAM, being able to stick to the 235W TDP is very nice, and for business/research this is very important - it's a potential upgrade.

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yes, 12Gb and 64fp performance is hard to replace for some tasks.
I was very happy they released a 1k$ 6gb card a few months ago, as even current 3gb 780ti is significantly slower for my tasks due to a lot of memory swapping between GPU and system.

12Gb would be even better, but I can not justify 5k$ just yet :)

I'm using two GTX Titans and two Tesla K40 and I have 305,000 average work. I don't know if that is ok or should be higher.

It is bad

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My GTX660Ti does ~320k RAC, had even reached 330k. And that's under Win 8.1, i.e. without XP/Linux speed boost.

MrS

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Scanning for our furry friends since Jan 2002

Any Ideas whats wrong with the setup?? Running Boinc as is with Nvidia driver 332.50. Shows 4 GPU crunching.
I am now installing on Windows 2008 R2 to see if the tesla k40 work better. also using single precision on all cards

Thanks

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Post some info about your GPU stats - load %, temperatures, power %, etc.

Hello, under GPU=Z the load on both titans is 66%, temp about 56C, power 66%.

The tesla k40 show nothing under GPU-Z but they are crunching. Wrote to Nvidia and they are working on a driver fix so that it shows up under GPU-Z

Stop running Short tasks and just run Long tasks. The credit/h is higher.
It will take time for your RAC to rise. Going by the runtime of your last Long task, if your computer is on 24/7 your potential RAC is about 1.6Million/day. However, I suspect a better configuration could improve that to somewhere between 1.8M/day to 2M/day. Running short tasks it's would only be about 700K/day.

I suggest you stop running CPU tasks on that system, and just run GPU work. Use software such as MSI Afterburner to set the fan high enough to prevent the cards from getting too hot. Check that your GPU clocks don't fall.

I see that several tasks failed or were Abandoned (presumably when you changed OS). Odd that the GPU's are failing when the temp is only 62C.

Suggested reading,
FAQ - Best configurations for GPUGRID

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I would think you would want to move the Tesla cards to a different computer and install drivers that are designed specifically to support them. I think the latest win 8.1 drivers for Tesla are 332.50 WHQL, which interestingly also supports cuda 6.0.

Thanks for the replies. How do i specify only long tasks?

Thanks

You can set it in your GPU-Grid settings in "my account", for each venue separately if needed. You can assign hosts to venues in the host details under "my computers".

(I'm assuming you're familiar with how this owrks under pretty much all BOINC projects, if not I/we could be more specific)

MrS

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Scanning for our furry friends since Jan 2002

Thanks for the replies. How do i specify only long tasks?

Thanks

On the web site in "Your account" then "GPUGRID Preferences". You can choose for long, short, beta. If you only thick the long runs, you get only those.

Edit: while typing this ETA was faster :)

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Greetings from TJ

Okay. All set as long runs only. Let's see what happens!

Thanks

It's strange, that GPU-Z doesn't show info about Tesla.
Can you maybe try HWiNFO if it reports sensor information about them ?

Installed HWinfo and it show tesla K40 at 63% load on one of the tesla. The other tesla shows up but the load information is not shown or is not listed on the screen to show up.

Same for the Titan, 63% load and shows complete info on one only.

I could have a look at why/what it reports in more detail if you send me the HWiNFO Debug File. But I think the most likely reason for not showing all GPUs is that the drivers don't have proper NVAPI support (yet).

That is what nvidia told me about the Teslas not showing up under GPU-Z.