ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR <b>在您最需要的时候，为您提供更高的性能</b> 当低于规格限制操作时，Intel® Turbo Boost Technology 2.0 可以通过提高操作频率加速处理器和图形性能。最大频率取决于工作负荷、硬件、软件和整体系统配置。 2.0 Does not contain "conflict minerals": tantalum, tin, tungsten, and gold. Y 4th Generation Intel® Core™ processors are based on Intel® microarchitecture formerly known as Haswell, manufactured on 22 nm process technology with 3D tri-gate transistors. This platform provides excellent CPU, graphics, media performance, flexibility, and enhanced security over the 3rd generation Intel® Core™ processors, making it ideal for a broad range of intelligent systems. Intel Core i5-4xxx DIRECTIVE (EU) 2022/2380 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 23 November 2022 (Part III) y 戴尔 Latitude E5540, 英特尔®酷睿™ i5, 2 GHz, 39.6 cm (15.6"), 1920 x 1080 像素, 8 GB, 500 GB 戴尔 Latitude E5540. 产品类型: 笔记本, 外型: 翻盖式. 处理器系列: 英特尔®酷睿™ i5, 处理器: i5-4310U, 处理器频率: 2 GHz. 显示器尺寸（对角长）: 39.6 cm (15.6"), HD 类型: Full HD, 显示器分辨率: 1920 x 1080 像素. 内置存储器: 8 GB, 内存类型: DDR3L-SDRAM. 总存储容量: 500 GB, 儲存裝置: 混合式硬盘, 光驱类型: DVD±RW. 已预装操作系统: Windows 7 Professional. 产品色彩: 黑色