I have a biostar p4m89-m7b ver.1.0 mainboard . and 2.20 ghz dual core. want to upgrade to a quad... Will it work? also I have 4.00 gb of ram installed, but when I pull up system properties it says that I have 4 gb installed but only 2.94 is usable... why is this? if anyone can help he with these ques. I would greatly appreciate it.