Amazon offers the Corsair XMS3 4GB PC3-10666 DDR3-1333 240-Pin Dual Channel Desktop RAM, model no. CMX4GX3M1A1333C9, for $42.90 with free shipping. That's the lowest total price we could find by $12, although we saw it bundled with software for $25 less after rebate last summer. The RAM features a 9-9-9-24 timing.