Listen to Noko. Load the Radeon drivers (any version, they include parameters for all card versions). Now heres how to trick it out-run regedit, go to "HKEY_LOCAL_MACHINE\Software\ATI Technologies\Driver\000(x)\atidxhal" Enter in three new strings "FastZClearEnabled" with a value of 1, "DisableHierarchicalZ" with a value of 0, and "DisableHyperZ" with a value of 0. Now you have an LE with Hyper Z. Download Powerstrip v3.0 Beta to overclock it if you need more speed, mine runs fine at 183/183.
Cast not thine pearls before the swine