Home > Intel Processor Technology > Intel Core i7: Description and features the new Intel processor

Intel Core i7: Description and features the new Intel processor

With the code name Nehalem known until now for several years been developing it finally comes to market commercial renamed Intel Core i7 in its versions of two, four and eight cores.

Built to 45 nm., Is the first Intel processor to get four eight natively embedded processors sharing the same cache and processor instructions. Likewise back hyper threading technology and use not in the Pentium 4, so the operating system would bring us if we had installed 16 processors the Intel Core i7 Octo. Furthermore, the memory controller is integrated into the proce

ssor itself with new technology Quick Path, something that AMD already has accustomed us for quite some time with Hyper Transport technology.

We change and chipset socket, ie, the processor will not support any developed motherboards for Intel Core 2 and older processors. Intel Core i7 need new motherboards and chipsets again. The processor socket has grown considerably in size becoming LGA1366 compared with the previous 775.
The name “Intel Core i7”

Although Intel has not yet ruled on the origin of the name “i7”, has been much speculation about this name on the web. I do not agree with any of these speculations, so I post mine here. The letter “i” would come from Intel, and the number would refer to the generation of the processor according to the following table.

Generation 1: It would cover all Intel processors up to 80188.
Generation 2: The Intel 286 and all its variants.
Generation 3: The Intel 386 and all its variants.
Generation 4: The Intel 486 and all its variants.
Generation 5: The Intel Pentium processor and all its variants.
Generation 6: The Intel Core, Intel Core 2 and all its variants.
Generation 7: The Intel Core i7.

Multiple cores with HyperThreading (HT) Multi-Threading (SMT).

One of the main features of this processor is to integrate natively multi-core (single die). Ie cores that share cache and instruction set. Available in two, four and eight cores at speeds ranging from 2.66 Ghz initially. up to above 4 GHz, although initially only see quad-core versions.

With Hyperthreading Multi-Threading technology and used with Pentium 4, each processor will be able to execute two instructions per clock cycle, so that in a system that has the Intel Core i7 with four cores, the operating system will report that has installed eight cores.

The old HyperThreading (HT), change of name Intel Core i7, to be called Simultaneous Multi-Threading (SMT) will feature 2-way (2-way) to administer up to 16 threads (threads) run in eight-core processor , which is what allows Intel Core i7 or failing 8 threads on a quad core.

It is somewhat contradictory because multi-core processors should make up for what is trying to do with the HyperThreading in single-core processors from the company years ago, but the idea of having more threads is something for future computer systems rather seduce and whether they can have more strings in quotation marks, to be seen as systems and applications take advantage of these additional channels to optimize performance, it is known that when incorporated Intel P4 HT in, not all applications had used or knew to use it, because almost everything was planned for a single thread of execution. Currently the trend is to exploit dual or quad core processors to optimize performance, see if this refurbished HT does make a difference.

Shared Cache High-Level.

Improvements in the cache with a new ARCHITECTURE three levels: with 32 Kb L1 cache caches for instructions and for another 32 Kb data cache, L2 cache per core new latency very low with 256 KB per core for data and instructions, and a new L3 cache shared by all cores and Mb with different configurations depending on the type of processor, 8 MB in the case of a Core i7 with four micelles, although with time it will expand the shared cache.

Intel processors will in what it called Multi-level shared cache, this means that probably both cache Level 2 (L2) cache memory as level 3 (L3) will be memories shared by each of the cores processor, this brings the advantage that it simplifies the design of the internal architecture of the processor, but be careful in the way that each of the core tries to access memory so that conflicts do not occur at the entrances, perhaps with an internal switch that manages the requests. That this will always be more optimal that each core has its own cache and access to the only to have a single large cache in two, four or more cores try to access the leading, colas or latencies too high at the entrance, causing a contradiction in the rationale of the Cache of a processor, which is to save time by having an external cache or try to access the main memory in critical tasks.

Intel QuickPath

Intel Core i7 processor has an integrated memory controller inside the processor. Intel QuickPath Interconnect, is a networking technology with point-to-point processor developed by Intel competes with AMD’s HyperTransport technology.

This technology includes a memory controller inside the processor. Replacing Front Side Bus (FSB) of the Xeon and Itanium processor.

The performance of this technology is reported to be 4.8 to 6.4 Gigatransferencias per second (GT / s) per direction, and a link can be 5, 10 or 20 bits long in each direction. In addition the bandwidth provided by a link full length rises from 12.0 to 16.0 GB / s per direction, or from 24.0 to 32.0 GB / s per link.

Supports up to three channels of DDR3 memory at 1600 Mhz so we’ll start to see plates with six memory slots instead of four.

Integrated Graphics Processor

Also include a graphics processor integrated into the processor itself also in response to the announcement of AMD Fusion technology which involves integrating a graphics processor inside the processor.

In the case of Intel Core i7, will be different versions of this processor, one without this driver and others with the integrated processor.

Although we will not see Intel i7 Conrad until 2009, the idea is to include a GPU integrated discrete graphics processor for specific models, such as laptops and ultra-mobile devices (UMPC) as energy consumption is very consegurĂ­an low so that significantly increase battery life in mobile systems like laptops.

New SSE Instruction Set 4.2

Streaming SIMD Extensions (SSE) instruction set is a SIMD (Single Instruction, Multiple Data – Single Instruction, Multiple Data) added in the year 1,999 the Pentium III processor, as an extension to the x86 architecture as a response to AMD’s 3DNow! AMD was implemented years ago.

Version 4.2 of the vector extensions Intel SSE brings back to the future the x86 ISA ago with the addition of new string manipulation instructions. I say “Back to the Future” because the level of support ISA processing chain is a characteristic of CISC architectures that are now considered obsolete in the years post-RISC. But the chain of the new SSE 4.2 instructions are designed to accelerate XML processing, which makes them perfect for the Web and future applications based on XML.

SSE 4.2 also includes a CRC instruction accelerating storage and networking applications, as well as an instruction POPCNT useful for a variety of tasks specified pattern. In addition, to provide support mejopr multithreaded applications, Intel has reduced the latency of thread synchronization primitives.

On the virtualization front, accelerate the transition and has some improvements, I will not detail here, in its virtual memory system that greatly reduces the number of such transitions required by the Hypervisor.

Other Features

Dispatch four units instead of three, resulting in a 33% improvement of data processing by the processor. The Intel Core i7 will run four microinstructions at once instead of three Intel Core 2, achieving a considerable increase in speed.

Furthermore, this process will take a second buffer of 512-entry TLB (Translation Look-aside Buffer). This circuit is a table used to convert physical and virtual addresses for the virtual memory circuit. Adding this second table is considerably improved processor performance.

A new second branch prediction buffer or BTB (Branch Target Buffer) and increasing the size of the first and the second new buffer will charge more instructions and more accurately predict what the next processor instruction to further improving processor performance.

Also noteworthy is the Turbo, which again returns to processors and in epochs of 386. The model could reach 2.66 to 2.8 with Turbo in times of high demand for process work and CPU load and speed would drop at rest.

This also greatly facilitates the work of overclocking, increasing the multiplier as turbo fast speeds are achieved with ease, of course this requires having good cooling systems or dissipation of the processor as well as increasing the voltage of the same. Extreme stress that the model has the unlocked multiplier, making any overclocking, while other processors are multiplier locked, preventing greatly increased processor performance, unless you manually increase the frequencies. You can already see in several stores which are selling computers with this processor to overclock to 4.2 Ghz.

Availability and Models.

Initially, in October 2008 will see the first models with socket LGA1366, quad-core and 8 MB of cache, will be the Intel Core i7 at speeds of 2.66 GHz, 2.93 GHz and its version 3.2 Extreme Editon Ghz with dual and triple versions channel DDR3 1066 and 1333 and 1600 MHz memory buses 1x 4.8 GT / s QuickPath, 1x 6.4 GT / s and 2x QuickPath QuickPath. The consumption of this processor is at 130 W.

The first chipset to the processor, will be optimized and developed for work (unfortunately) with Windows Vista operating system will offer better performance than Windows XP on these processors and chipsets.

Updated October 2008.

Intel sources said, could be canceled development of the processor with eight cores to launch directly in the middle or end of 2009 a model with twelve cores, more than 12 MB of cache, speeds of 4 GHz and, of course, lower . Is scheduled for these dates the launch of the new generation of Intel Corel i7: new processor, new chipset, this time and optimized for Windows Seven (more information about this item at Launch of the final and definitive version of Windows Seven RTM Enterprise on November 30, 2009 and the rest on 30 January 2010).

Update December 2009.

Not counting the latest processors appeared on the market under the name Core i7, i5 and i3, Socket 1156, the new Core i7 socket 1366 and 32nm technology will have 6 cores (12 processing units with Hyperthreading) and hit the market in the first quarter of 2010, probably in March. Your name Intel Core i7 980X series.

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