that's almost trivial compared to other issues. you have to learn to crawl before you can walk. for instance gpugrid, a DC project focused on curing diseases, attempted to make an ATi client based on opencl. we waited 2 months. the 5870 ended up performing as fast as an 8800gtx.
almost 2 years before this nvidia gave away free cards to gpugrid and helped them develop their acemd molecular dynamics software on cuda. gpugrid is currently the fastest bio-med project on boinc.
f@h is in the same situation. they want to make one good opencl client that can run on all hardware but they have to wait on stable compilers which takes time. i know this all sounds like a huge tangent but other developers eager to use gpu's are probably running into the same problems.




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