This driver comes directly from NVIDIA's developer website. 

Windows driver version 306.63 and Linux drivers version 304.15.00.03 provide beta support for OpenGL 4.3 and GLSL 4.30 on capable hardware.

OpenGL 4.3 Driver Release Notes
You will need any one of the following Fermi or Kepler based GPUs to get access to the OpenGL 4.3 and GLSL 4.30 functionality:

Quadro series: 6000, 600, 5000, 410, 4000, 400, 2000D, 2000
GeForce 600 series: GTX 690, GTX 680, GTX 670, GT 645, GT 640, GT 630, GT 620, GT 610, 605
GeForce 500 series: GTX 590, GTX 580, GTX 570, GTX 560 Ti, GTX 560 SE, GTX 560, GTX 555, GTX 550 Ti, GT 545, GT 530, GT 520, 510
GeForce 400 series: GTX 480, GTX 470, GTX 465, GTX 460 v2, GTX 460 SE v2, GTX 460 SE, GTX 460, GTS 450, GT 440, GT 430, GT 420, 405
All the extensions listed below are part of the OpenGL 4.3 core specification, but they can also be used in contexts below OpenGL 4.3 on supported hardware.

For OpenGL 3 capable hardware, these new extensions are provided:

ARB_arrays_of_arrays
ARB_clear_buffer_object
ARB_copy_image
ARB_ES3_compatibility
ARB_explicit_uniform_location
ARB_fragment_layer_viewport
ARB_framebuffer_no_attachments
ARB_internalformat_query2
ARB_invalidate_subdata
ARB_program_interface_query
ARB_robust_buffer_access_behavior
ARB_stencil_texturing
ARB_texture_buffer_range
ARB_texture_query_levels
ARB_texture_storage_multisample
ARB_texture_view
ARB_vertex_attrib_binding
KHR_debug
For OpenGL 4 capable hardware, these new extensions are provided:

ARB_compute_shader
ARB_multi_draw_indirect
ARB_shader_image_size
ARB_shader_storage_buffer_object