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[roboto]

I have a Radeon 7970 and need more than 4GB. Currently, querying the device for adddress bits returns 32. I assume this is why I can't fully use my 6GB . Is it possible to use more than 4GB like CUDA?

Or does the AMD OpenCL driver only support 32bit addressing?

Thanks!

[moozoo · Accepted solution]

set GPU_FORCE_64BIT_PTR=1

http://devgurus.amd.com/thread/160325

[roboto]

Thanks! Where is this documented? I had to do a dumpbin on amdocl64.dll to see that variable.

I have seen a .h file describing all these variables at one point but I can't find it any more.