![]() On average, Nehalem provides a 15–20% clock-for-clock increase in performance per core.30% lower power consumption for the same performance.10–25% better single-threaded performance / 20–100% better multithreaded performance at the same power level.It has been reported that Nehalem has a focus on performance, thus the increased core size. Macro-op fusion now works in 64-bit mode.Second-generation Intel Virtualization Technology, which introduced Extended Page Table support, virtual processor identifiers (VPIDs), and non-maskable interrupt-window exiting.Integrated memory controller supporting two or three memory channels of DDR3 SDRAM or four FB-DIMM2 channels.Integration of PCI Express and DMI into the processor in mid-range models, replacing the northbridge.64 KB L1 cache per core (32 KB L1 data and 32 KB L1 instruction), and 256 KB L2 cache per core.Intel QuickPath Interconnect in high-end models replacing the legacy front side bus.Native (all processor cores on a single die) quad- and octa-core processors.3 integer ALU, 2 vector ALU and 2 AGU per core.both instructions and data) that contains 512 entries for small pages only, and is again 4 way associative. sTLB (second level unified translation lookaside buffer) (i.e.Nehalem also supports all predictor types previously used in Intel's processors like Indirect Predictor and Loop Detector. Instruction Fetch Unit (IFU) containing second-level branch predictor with two level Branch Target Buffer (BTB) and Return Stack Buffer (RSB).Cache line block on L2/元 cache was reduced from 128 bytes in NetBurst & Conroe/Penryn to 64 bytes per line in this generation (same size as Yonah and Pentium M).Technology Microarchitecture of a processor core in the quad-core implementation Nehalem later received a die-shrink to 32 nm with Westmere, and was fully succeeded by "second-generation" Sandy Bridge in January 2011. Nehalem is an architecture that differs radically from NetBurst, while retaining some of the latter's minor features. ![]() ![]() Hyper-threading is reintroduced, along with a reduction in L2 cache size, as well as an enlarged 元 cache that is shared among all cores. Nehalem is built on the 45 nm process, is able to run at higher clock speeds, and is more energy-efficient than Penryn microprocessors. The term "Nehalem" comes from the Nehalem River. It was used in the first-generation of the Intel Core i5 and i7 processors, and succeeds the older Core microarchitecture used on Core 2 processors. Nehalem / n ə ˈ h eɪ l əm/ is the codename for Intel's 45 nm microarchitecture released in November 2008. Pentium, Core, Core i n and Xeon Series. ![]()
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