7
$10.00
around £10
ddr3
240-pin DDR3 dimm is currently the fastest memory. it can support quad, triple, or dual channels or be installed as a single dimm. it has an offset notch father from the center than a ddr2 dimm
dimm (ddr3)
One
DDR3
DDR3 uses lower voltage
No, you can't use same DIMM slots for DDR2 and DDR3 due to different position of the key and interface incapability.
2.66" 204-pin SO-DIMM contains DDR3 memory. The one notch on the module is offset from the center of the module.
$10.00
DDR3 uses lower voltage