桑迪桥和尼哈勒姆建筑之间的区别

桑迪桥与尼哈勒姆建筑

珊迪大桥and Nehalem Architectures are two of the most recent processor microarchitectures introduced by Intel. Nehalem processor architecture was released in 2008 and was the successor to Core microarchitecture. Sandy Bridge processor microarchitecture was the successor to the Nehalem microarchitecture and it was released in 2011. Obviously, being the later release, Sandy Bridge possesses improvement over the features and performance offered by Nehalem architecture.

Nehalem建筑

Nehalem处理器体系结构于2008年发布，是核心微体系结构的继任者。45 nm制造方法用于Nehalem架构。2008年11月，英特尔发布了第一个使用Nehalem处理器微体系结构设计的处理器，这是核心i7。很少有其他Xeon处理器i3和i7很快随之而来。Apple Mac Pro Workstation是第一台包括Xeon处理器（基于Nehalem）的计算机。2009年9月，第一个基于Nehalem Architecture的移动处理器发布了。Nehalem处理器体系结构重新引入了超线程和L3缓存（最多12MB，所有内核共享），它们在基于核心的处理器中缺少。Nehalem处理器有2、4或8个核心。Nehalem微处理器中存在的其他值得注意的功能是DDR3 SDRAM或DIMM2存储器控制器，集成图形处理器（IGP），PCI和DMI集成到处理器，64 kb l1，256 kb L2 Caches，第二级分支预测和翻译lookaside bufferer。

桑迪桥建筑

Sandy Bridge处理器体系结构是上述Nehalem架构的继任者。桑迪桥基于32 nm的制造方法。基于此体系结构的第一个处理器于2011年1月9日发布。类似于Nehalem，Sandy Bridge使用了64KB L1缓存，256 L2 CACHE和共享L3 CACHE。对Nehalem的改进是其优化的分支预测，促进先验数学的促进，通过AES和SHA-1哈希进行加密支持。此外，在Sandy Bridge处理器中引入了一个称为Advanced Vector Extensions（AVX）的浮点算术的256位更宽的向量的指令集。已经发现，与基于Nehalem架构的Lynnfield处理器相比，Sandy Bridge处理器可提供多达17％的CPU性能。

桑迪桥和尼哈勒姆建筑之间的区别

桑迪大桥架构于2011年发布successor to the Nehalem processor microarchitecture, which was released in 2008. Understandably, Processors based on Sandy Bridge architecture has a number of improvements over processors based on Nehalem Architecture. A notable difference in specifications is that Sandy Bridge uses a smaller nm technology for its circuitry. Performance wise, it is claimed that there is a 17% improvement in terms of per-clock basis in Sandy Bridge processors than Nehalem processors. Sandy Bridge has improved branch prediction, transcendental mathematics facilities, AES for encryption, SHA-1 for hashing and Advanced Vector Extension for improved floating-point arithmetic. In a benchmark study conducted by SiSoftware between a 3066MHz, 4 core Nehalem processor and a 3000MHz, 4 core Sandy Bridge processor, it was found that the latter outperforms the former in the areas of CPU arithmetic, CPU multimedia, Multi-core efficiency, Cryptography and power efficiency. Furthermore, in the areas of Media transcoding, Memory controller speed and L3 cache performance, the Sandy Bridge processor wins the battle over Nehalem processor.