GL.UniformMatrix4 Doesn't work with an array or pointer on NVidia Card.

You are trying to pass 16 matrices to the shader. Is that what you meant to do? Does your uniform declaration match this in the shader? (i.e. are you declaring a mat4[16] array?)

From the documentation:

• GL_INVALID_OPERATION is generated if there is no current program object.
• GL_INVALID_OPERATION is generated if the size of the uniform variable declared in the shader does not match the size indicated by the glUniform command.
• GL_INVALID_OPERATION is generated if one of the integer variants of this function is used to load a uniform variable of type float, vec2, vec3, vec4, or an array of these, or if one of the floating-point variants of this function is used to load a uniform variable of type int, ivec2, ivec3, or ivec4, or an array of these.
• GL_INVALID_OPERATION is generated if location is an invalid uniform location for the current program object and location is not equal to -1.
• GL_INVALID_OPERATION is generated if count is greater than 1 and the indicated uniform variable is not an array variable.
• GL_INVALID_OPERATION is generated if a sampler is loaded using a command other than glUniform1i and glUniform1iv.
• GL_INVALID_OPERATION is generated if glUniform is executed between the execution of glBegin and the corresponding execution of glEnd.