Windows CUDA 2.04 Opt App Now Available
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Message boards : News : Windows CUDA 2.04 Opt App Now Available

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Message 8004 - Posted: 20 May 2010, 18:45:55 UTC

The Windows CUDA 2.04 application is now available on the Optimized Applications page and a thread has been created on the message board to report any issues, suggestions, etc.

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Message 8236 - Posted: 4 Jun 2010, 10:42:02 UTC - in response to Message 8004.

I suppose it just won't work on 64bit Win?
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Message 8243 - Posted: 5 Jun 2010, 0:05:47 UTC

Obsolete question by now. ;) It does run properly on 64 bit Windows XP and 7.

So, next question... could you gain even more by optimizing for 64 bit or creating a native 64 bit application?
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Message 8410 - Posted: 17 Jun 2010, 1:56:04 UTC - in response to Message 8243.

Obsolete question by now. ;) It does run properly on 64 bit Windows XP and 7.

So, next question... could you gain even more by optimizing for 64 bit or creating a native 64 bit application?


Unfortunately not. The nVidia cards are 32-bit so there is no benefit to going 64-bit. While CUDA now supports 64-bit integers, they are twice as slow as 32-bit integers, so there is really no benefit. CUDA doesn't have a 64-bit multiply function for getting the high 64-bits, so to multiply, one has to convert back to 32-bits first and the conversions make it slower than just using 32-bit integers.


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