I'd say no it cannot for two reasons. 1) Each cube needs 2 PCIe power adapters. Your power supply only comes with 2. So you can only power 1 cube with this, not 2 cubes. You'd need 4 PCIe power adapters coming from the PSU.  2) Each cube uses 400W at baseline. Overclocking will require about 450. Your power supply is only 650.

I purchased two Corsair AX850's refurb from local electronics store for $108 each. Both come with 4 PCIe cables so I am powering 4 cubes with 2 PSUs. Non-overclocked, getting about 32GHs each.