Main difference between series of a chipset 945 from a series 915 it is?

Support of dual core processors or

Support of technlogy Hyper-Threading 2 or

Support memory DDR2 667MHz or

Support SATA 2.0 or

Support of frequency system bus 1066 MHz or

Support PCI-Express (PCI-E) 16x

Main difference between series of a chipset 945 from a series 915 it is?

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