Nekar Xenos wrote:
> I have a 1Gb ATI HD5770 which has no double precission floating point
> suppport.

Looks like it, http://www.realtech-vr.com

Are you sure isn't a 4770? , the HD5000 series tend to have 256-bit 
memory (DDR-5) bus and 64-bit FP support (double precision).

Do you used a diagnostic tool to check your DPFP?
You can use AIDA64 it iused to have a free version of the extreme 
edition when they merged with Everst, anyway, once in it you can go to 
Display -> GPGPU -> Device Features

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