Your question states that you have 945 chipset family.
You cannot download 965 because you do not have 965 - you have 945.
This number is the model number for a hardware chip on your motherboard. So it will only run drivers designed for the correct model number - its not like a software version - its a hardware version
Same reason why you can not download more ram or hard drive space... Physical things don't travel too well through the intertubes. You cannot "dowload" a chipset...
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Your question states that you have 945 chipset family.
You cannot download 965 because you do not have 965 - you have 945.
This number is the model number for a hardware chip on your motherboard. So it will only run drivers designed for the correct model number - its not like a software version - its a hardware version
Same reason why you can not download more ram or hard drive space... Physical things don't travel too well through the intertubes. You cannot "dowload" a chipset...