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Posts by Grasor

1) Message boards : Number crunching : GPU Requirements (Message 56043)
Posted 1 Nov 2012 by Grasor
Post:
If you do not have double precision in your GPU, the Milkyway@Home GPU workunits will not run. Only CPU workunits with run on that computer. See the first post in this forum.

However, I believe that one of the AMD GPUs has double precision, but little enough that they decided not to list it. Your GPU may be one of those, and therefore able to run Milkyway@Home workunits, but slower than those with more double precision capability.



The first post in this forum does not specifically state what you claim. It says that DP is required to participate. Which is not the same thing as what you are stating; which is why I asked for clarification as to what was ocurring on my system. Thank you for the rest of your post.

Thank you Swiftmallard for your post, I did know the difference between the two cards but had not heard of Collatz. I'll take a look.

Best All,
-G
2) Message boards : Number crunching : GPU Requirements (Message 56034)
Posted 31 Oct 2012 by Grasor
Post:
Hi all,

I'm just going to ask since I don't think it's been brought up already. What happens if your system does NOT have a GPU with the double precision extension?

I ask because, I don't believe I do since I'm sporting an ATI Mobility Radeon 5850 HD which does not list the double precision extension in its specs.


http://www.amd.com/us/products/notebook/graphics/ati-mobility-hd-5800/Pages/hd-5850-specs.aspx

That said, I have been running Milkway@home on this machine, and it seems to be working about as well as the other projects Rosetta & SETI@home. I do get a warning now and again that I am lacking the extension. In fact, this project has my highest average credit of the three projects and resources are allocated evenly.

Does the project just run a lot slower? When I read these posts about the requirement of the DP extension is sounds like I shouldn't be able to participate at all.

Thanks for clearing this up.

-G





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