Would cpu upgrade makes difference for....

zzzxtreme

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Sep 15, 2009
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hi, my nephews' PC is an HP6155D

Core 2 Duo E4400 (C) DC 2.0 GHz
800 MHz front side bus
Intel 945G
2GB RAM
ASUS ENGTX260 TOP 896MB

I just recently upgraded the graphic cards
running windows XP, all updated, latest dx , HDD on IDE mode despite having SATA HDD

they say playability is ok, but some games, when I move the character up to look at the sun, it lags, even at low settings. (1440*900).

what can I do to improve gaming experience with minimum spending ?

thanks in advanced