A spatial footprint predictor includes a mechanism to measure spatial footprints of nominating cache-lines and hold the footprints. In some embodiments, the mechanism includes an active macro-block table (AMBT) to measure the spatial footprints and a spatial footprint table (SFT) to hold the spatial footprints. In other embodiments, the mechanism includes a macro-block table (MBT) in which macro-blocks may be active or inactive.