function atomicMin

Hello, I have a problem. I have 64-bit system windows 7 and my graphics card support maximum compute capability 3.0.I need use function atomicMin, but compiler informs me that this function does not know. On 64-bit system it´s available version 3.5 and higher, i know.
Does anyone know a trick how this could be used this function to compute capability 2.0?

Thank you very much.