right now i have a 2.26 ghz pentium 4, 512 ram, and a bad NVIDIA geforce 4 mx 440 128 mb. i want to upgrade my video card, but i found out my power supply is only 160W! i cant upgrade my power supply because it was custom built for my computer, so i would have to find another power supply with the same exact dimensions as mine, which wont happen. i was wondering if i bought a new case, can i get a new power supply installed in that, or am i stuck with my computer and i cannot play halflife2 the way it is meant to play. if anyone can help me i would really appreciate it. thanks in advance