u plan on overclocking? the P42.6ghz isn't that fast anymore...but it should perform well. instead of a 2800+, i'd got for a 2500+/2600+ mobile chip...it'll overclock like mad and give you better performance. i think for games like DOOM3 you might want PC3200 or better...its not required...but faster RAM will always be better not only for games too. most important though would be waht gfz card do you have/plan to buy...that will make/break a computer.
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