LE's can get to at least 350-400 MHz range. Often the memory can't get too much over 400 at all. Don't see a whole lot about the LEs.
At best you still have a 5700 core, which is kinda questionable for anything but OpenGL games.
Overall I think the Radeon 9550 is a better value if you're looking for anything DirectX, cheaper and faster. They are similar to the 5700 LE in that the core is severely underclocked and memory is 200 MHz DDR. However the ATi low/midrage card cores has proven to be much better at DX games than the GeForceFX cores.