Overview Reviews Product Description P550B 230V Efficiency 86% at 20% load, 88% at 50% load, 85% at 100% load Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Gigabyte Gigabyte GP-P550B 550W ATX 85/88/85 MEPS PSU 3yr wty Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments