My new dimension 4700 comes with 4 DIMM slots for ram and occupies either one or two slots (with 512 MB of DDR SDRAM). I was wondering what would happen if I bought two sticks of dual-channel ram (1 Gb RAM dual-channel pack). Would it stack with the standard ram and count as single channel (making it 1.5 gb) or would the single channel ram be bypassed and only have 1 GB dual-channel?