IBM/Lenovo SurePOS Memory Upgrade Configurator - choose your Model:

300 Series 4810-33x
4694 Series 4694-205, 245 (2x5)
4694 Series 4694-206, 246
500 Series 4840-5x4
500 Series 4851, 4951-xx4
500 Series 4852-x26
500 Series 4852-x66
500 Series 4961-E2S
500/600 Series 4840-5x1, 6x1
500/600 Series 4840-5x2, 4840-6x2, 4940-5x2
500/600 Series 4840-5x3, 6x3
700 Series 4800-723
700 Series 4800-743
700 Series 4800-783
700 Series 721
700 Series 722
700 Series 741, 781
720 Series S21
730 Series 4800-xxx
750 Series 4800-xxx