Lower CUDA requirement


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Questions and Answers : Wish list : Lower CUDA requirement

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FloydHung
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Message 906350 - Posted: 11 Jun 2009, 23:56:00 UTC

My notebook's GPU has 128MB. So I just wish the development team can lower requirement to 128MB. Otherwise, the 'insufficent memory' message is so anguished.

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Message 906364 - Posted: 12 Jun 2009, 0:31:09 UTC - in response to Message 906350.
Last modified: 12 Jun 2009, 0:31:51 UTC

The need for at least 256MB of video memory is for translating the task into something the GPU can handle. It can't just run through the data as the CPU can do it, as a task has to be translated into kernels for the GPU to run. These kernels take up a lot of space, around 200MB.

It's not just one kernel running, it's a lot of them. That's why the CPU is used to transfer this data from the disk to the video memory and once the GPU is done with it, back to the disk to make room for the next kernel.

There is for this project just no way around using that amount of video memory. Perhaps that other projects use less memory, but I wouldn't hold my hopes up.
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FloydHung
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Message 908996 - Posted: 19 Jun 2009, 0:18:35 UTC - in response to Message 906364.

Well, somehow before verion 6.6.26(?) I did not receive "insuff..." message and seem CUDA worked. Maybe I was wrong about those messages. :D
Anyway, if the development team can overcome this tech issue, I will be very very happy. lol

OzzFan
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Message 909042 - Posted: 19 Jun 2009, 3:35:20 UTC - in response to Message 908996.

You didn't get those messages before, but the requirement was always at 255MB of video RAM. If you didn't have it, it would fall back to CPU processing.

I really don't foresee them lowering the requirement to 128MB. It was nVidia's own programmers that made the program, so I have to assume they optimized it as best they could and 255MB was the lowest they could do.
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Questions and Answers : Wish list : Lower CUDA requirement

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