Memory 256 MB DRAM built into Apple A4 package (top package of PoP contains two 128 MB dies ) Display 1024 × 768  px ( aspect ratio 4:3), 9.7 in (25 cm) diagonal, appr. 45 in 2 (290 cm 2 ), 132  PPI , XGA , LED -backlit IPS LCD Graphics PowerVR SGX