I've been noticing a static/arcing noise coming from my system's power supply. It's a 350W Antec VP350 PSU about 1.5 years old. It's hooked up to a Phenom II X4 960T BE (OCed) and a Nvidia GTS 450 (OCed). I know that 350W is kind of stretching it for my setup, but I've calculated the exact power consumption of my setup and it's under 250W. The static/arcing noises only appear when running a very system-intensive game (Crysis, etc.). It's been happening for the last month with no noticeable consequences. Is this normal? Should this warrant a power supply replacement?