FirePower Technology 400 Watt StealthXStream Power Supply ATX 400 Power Supply OCZ400SXS 400W Configuration Internal 140mm fan 80+ Certified for high efficiency 3 year warranty backed by OCZ's exclusive Power Swap Warranty replacement program. No more endless return-for-repair loops 400W Configuration Internal 140mm fan 80+ Certified for high efficiency 3 year warranty backed by OCZ's exclusive PowerSwap Warranty replacement program. No more endless return-for-repair loops