...
... though using the Nvidia control panel causes BSOD ...
...

Hmm..

I finished now my new 'rig-project'.. ;-)

Using NCP will cause BSOD..?

I installed only the GPU-driver..

Then I looked in -> msconfig/systemstart

And found:

NvCpl - RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
nwiz - nwiz.exe /install
RunDLL32 - RUNDLL32.exe NvMCTray.dll,NvTaskbarInit
ctfmon - C:\WINDOWS\system32\ctfmon.exe

So it would be well to disable NvCpl ?
This is the NCP ?

What are the others?
Maybe something I could disable also?


SETI@home CUDA need DirectX ?
WinXP Home SP2 have DirectX 9.0c (4.09.0000.0904)
So maybe I need to update to DirectX 10? (supplied on the GPU-driver-CD)

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My ASUS P6T has 3 ways SLI the 3 slot is at 8x the first 2 are at 16x.
The ASUS P6T Delux is supposed to have 3 slots at 16x each. Of course you will have to get the i7 chip and ddr3 memory also with these MBs.

If you are runnning two CUDA cards on a multi-core machine, does 1 CPU manage both video cards or do you lose 2 CPU's (one per video card) ?

Brodo

Thanks for reply!

..but not my questions.. ;-D


I bought the MSI K9A2 Platinum with 4* PCIe 2.0 x8. [if 4 GPUs insert]


Yes, GPU-crunching need always one Core from CPU for crunching on one GPU..

Because of this I bought an AMD Phenom II x4 940 (Quad) for the mobo.. ;-)

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Thanks for reply!

..but not my questions.. ;-D


I bought the MSI K9A2 Platinum with 4* PCIe 2.0 x8. [if 4 GPUs insert]


Yes, GPU-crunching need always one Core from CPU for crunching on one GPU..

Because of this I bought an AMD Phenom II x4 940 (Quad) for the mobo.. ;-)

Stick with Intel for SETI it runs better on intel and you need a CUDA card and it only will use one card,

Stick with Intel for SETI it runs better on intel and you need a CUDA card and it only will use one card,

It will use more than one CUDA card provided you don't enable SLI.

One CPU backs up each GPU core. On my i7 I have two GTX 295 cards and so have a total of 13 running processes, 8 CPU intensive projects on the CPU cores, one non-CPU intense project (FreeHAL) and 4 GPU tasks ...

In that I am concentrating on GPU Grid the CPU impact is minimal with only flashes of 1-3% CPU use as the CPU loads up the GPU core ...

If you run a SaH task you will see a minute or two of high CPU use and then the CPU use drops to 1% or so ... In that I am not that interested in SaH I am only running one computer and it is on SaH Beta to boot so I cannot tell you what the main stream work looks like here ...

The Nvidia Control Panel is installed with the drivers and is launched from the right click menu of the desktop. As near as I can tell it dies with a thread trapped in the driver because they did not write the stupid thing to know that there might be more than one card in the box. In that their mind model would be that if you had two cards you would enable SLI mode this makes a little bit of sense ... but ... not if it costs you the abiltiy to process more work ... which is the current case ...

I expect a change in the next few driver series ... others are seeing BSOD for other causes with the tools ... so ... YMMV

As far as I know you do not need Direct-x 10 for CUDA, if you use 181.22 (GPU Grid experience) as the most stable driver BOINC should see the CUDA card. Note that you do have to do a restart for this to take effect.

WIth 64 bit versions the driver version that is stable is different but I don't recall the number, search the GPU Grid forums if it is needed ... same for Linux ...

The amount of CPU loading to run a GPU is almost negligible.
But it this way.. the amount thats lost in CPU processing is vastly less than the amount of processing done in the GPU.
My Q6600 doesn't process anywhere near as many tasks as the 8800GTS - by a long shot.

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If you are runnning two CUDA cards on a multi-core machine, does 1 CPU manage both video cards or do you lose 2 CPU's (one per video card) ?

Brodo

I've just put in a second 9800GTX+ in my Q6600 box and I see 5 tasks running - two using '0.18 CPUs, 1 CUDA'
So one CPU core is managing two GPU's, while three CPU cores are busy running their own tasks (currently a couple of Astropulse units and a climateprediction task)

btw: I've been looking at the GA-EX58 mobo which supports 3 GPU's - but with a host of qualifiers on bandwidth. The machine in NVIDIA's Tesla beast is running 4 GPU's - and I suspect might cost about as much to run as to buy.

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I had to dig this thread up because I found a mobo that has 4 x16 slots on it that looks like a good board.

Foxconn Destroyer AM2+

*shrug* I know it's not Intel-based, but you could throw a bunch of GPUs on it.

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Linux laptop:
record uptime: 1511d 20h 19m (ended due to the power brick giving-up)

I had to dig this thread up because I found a mobo that has 4 x16 slots on it that looks like a good board.

Foxconn Destroyer AM2+

*shrug* I know it's not Intel-based, but you could throw a bunch of GPUs on it.

The last slot is right at the edge so you can't fit a double slot in there unless you use the 8 slot ATX case mentioned earlier in this thread. At any rate, not all the PCIe x16 slots are x16 electrical, but it would still work.

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There is the ASUS P6T7 which gives 4 x 16 bit pci-e 2.0 slots.

See here

There doesn't seem to be anything on the ASUS web site about it.

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BOINC blog

There is the ASUS P6T7 which gives 4 x 16 bit pci-e 2.0 slots.

See here

There doesn't seem to be anything on the ASUS web site about it.

Of course not, It's too new and Asus is probably going to wait to unveil it at some show and from what I've read this motherboard isn't going to be cheap as It has two Nvidia Nforce 200 chips to get four 16x 16bit pci-e lanes in there(plus 3 useless 8bit slots when four 200 series video cards like the GTX 295 are installed). As there are no single slot 200 series Nvidia video cards last I looked.

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The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's

Single slot 295's may be on the way.

http://www.techtree.com/India/News/Nvidia_Working_on_Single-PCB_GeForce_GTX_295/551-100532-581.html

Martin

Single slot 295's may be on the way.

http://www.techtree.com/India/News/Nvidia_Working_on_Single-PCB_GeForce_GTX_295/551-100532-581.html

Martin

Actually that's not a single slot card, Unless they say It is, Instead of having two cards(PCBs), It will have a single PCB, Which means It could(Most likely would) be the same width as a 260 or a 275 or a 280 or a 285 card, 2 slots wide, Not 1 slot wide.

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The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's

Right, one pcb, two GPU's, but it seems the 200 series is evolving in the direction of single slot cards. Liquid cooling might be the final requirement for the hotter boards.

Martin

Right, one pcb, two GPUs, but it seems the 200 series is evolving in the direction of single slot cards. Liquid cooling might be the final requirement for the hotter boards.

Martin

A Single slot video card will only be truly a Single slot when the cooling solution doesn't take up two slots anymore.

As to Water cooling, Some 3rd party vendors do that already, But Nvidia?
On a Reference design?

Not likely, Keep dreaming, Hell would have to Freeze Over before that happens.

As What size tubing would one use?

There are lots of sizes and none of them standardized at all.

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The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's

Not likely, Keep dreaming, Hell would have to Freeze Over before that happens.

Well, it did once already! ("Eagles") :-)

Martin