Replace that older or non-functioning power supply in your PC with this premium power supply for heavily loaded systems, the ATXPOW400DF. This reliable 400 Watt, heavy-duty power supply is guaranteed compatible with Pentium 4 (and lower) and AMD processors and constructed from the highest quality components to ensure an extra long-life. The ATXPOW400DF provides the optimum power required for today's demanding 3D video, multi-CPU applications and additional drives. 2 ball-bearing, automatic temperature control fans ensure plenty of air circulation and a superior EMI/RFI power filtration system is used to provide system components with clean, stable power. Low noise/ripple as well as short circuit protection are additional reasons why the ATXPOW400DF is the ultimate power supply for system stability.