I use 64bit Windows and 10GB ram.
And cards I use: 2*5970 + 2*6870 + 5870
Tried different kernels, same problem.
There is no limit on the number of commands in a commandqueue. It is only restricted by the system memory.
If you exceed this limit you are likely to get a CL_OUT_OF_HOST_MEMORY.
I hope it is clear
If HOST_MEMORY means RAM then I'll try 16GB of it.
EDIT: I realised I use 32bit version of cgminer. Does it make sense if I try to compile 64bit version of it?
You have a lot of GPU devices. You will probably need to disable certain system devices in the BIOS such as serial/parallel port, USB ports, audio, PS/2 support, and so on to make room for the GPU's to be mapped.