Wishlist Quick view Lenovo Lenovo 4X20F28577 1100Watt H-Plug Power Supply for ThinkServer $429.99 LENOVO 4X20F28577 1100 WATT HOT-PLUG POWER SUPPLY FOR THINKSERVER RD450 RD550 RD650. NEW FACTORY SEALED. IN STOCK. Compare Add to Cart Add to Wishlist