My brother is going to upgrade his Dell laptop to 3GB 667MHz Dual Channel DDR2 SDRAM but will this slow my laptop down as it not Dual
slot 1 has 1GB 667MHz Dual Channel DDR2 SDRAM
Slot 2 has 2GB 667MHz Dual Channel DDR2 SDRAM
Will this fit the Dell 1720 below , dell said to upgrade to 4GB would cost £560
http://www.overclockers.co.uk/showproduct.php?prodid=MY-113-CR&groupid=701&catid=8&subcat=936
slot 1 has 1GB 667MHz Dual Channel DDR2 SDRAM
Slot 2 has 2GB 667MHz Dual Channel DDR2 SDRAM
Will this fit the Dell 1720 below , dell said to upgrade to 4GB would cost £560
http://www.overclockers.co.uk/showproduct.php?prodid=MY-113-CR&groupid=701&catid=8&subcat=936
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