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Message: <blockquote data-quote="flag au:" data-source="post: 7924912" data-attributes="member: 288132">Since its launch in late 2008, the  Nehalem based Intel Core i7 processors  are getting low on price and becoming mainstream processors. As a buyer, when you are searching for a  PC or notebook, with Core2 range of products, now you may see Core i7  based systems are up for sale at a very competitive price. They look very similar from their  specifications, like both processors are Quad Core, operates at a  similar frequency and shares  almost same features like, both supports Intel VT, Intel 64, Execute  Disable Bit, Speedstep Technology, Enhanced Halt State, 45mn technology  and so on.Conroe (Core2) vs Nehalem (Core i7) Core2 and Core i7 comes with a  completely different processor architecture.  All the available Core2 processors (Conroe, Allendale, Wolfdale) have  evolved from the original Intel Core architecture Conroe where as Core  i7 processors are based on a completely new architecture called Nehalem.  Processing speed and performance depends  on couple of things. First the speed or rather the operating frequency  second but most important the way by which it is processes a matter. We already have seen, Intel Dual Core  processor E2140 operating 1.6 GHz can out perform a Intel Pentium D 820  processors operating at 3.0 GHz while consuming less power, just because  the Core architecture is much better than the age old Pentium brand. Similar way, the Nehalem architecture is  much faster and power efficient than older Core2 range. Native Quad Core Intel Core i7 processors have 4 native  cores meaning there are 4 different cores given on a single physical die  compare to Core 2 Quad where we have 2 die having 2 cores each merged  together. <img src="http://www.chotocheeta.com/wp-content/uploads/2009/11/Intel_Core2_Core-i7_03.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://www.chotocheeta.com/wp-content/uploads/2009/11/Intel_Core2_Core-i7_04.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> It allows the Core i7 processors to  utilize the processor cache more efficiently than Core 2 Quad processors. L3  Cache Compare to Intel Core2 which comes with  large L2 cache, Intel Core i7 processors include a large amount of L3  cache along with L2 also. Core i7 processors having 256 KB of L2  for each core (256KBx4) where as a large 8 MB of L3 available as shared  among all the 4 cores, is much faster than Core 2 Quad where we have a  large L2 cache is been shared between 2 dies and 2×2 cores. Hyper-Threading is back Yeah.. That age old feature which we  have first seen in case of Intel Pentium EE processors is back with  Intel Core i7. Each and every core of Intel Core i7 processors can  process 2 threads simultaneously, thus appearing as a 8 core processor  to the Operating system. All though the feature didn’t click with  Pentium architecture but with Nehalem it seems to help a lot with todays new multi-core based  applications. Goodbye FSB and welcome QPI QPI is something, which is not new in  market, as AMD is using it for quite some time but its something new for  Intel, as finally they are saying goodbye to the traditional method of  connecting various part of the CPU. <img src="http://www.chotocheeta.com/wp-content/uploads/2009/11/Intel_Core2_Core-i7_05.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://www.chotocheeta.com/wp-content/uploads/2009/11/Intel_Core2_Core-i7_06.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> We already have seen the benefit of QPI  (Quick Path Interconnect) with AMD’s Hypertransport. However, Intel’s  QPI under Nehalem seems to have beaten AMD in their own game as Core i7  with QPI is much faster than AMD HyperTransport 3.0. Adopting QPI gives Intel another great  option to access memory directly via their Memory on Die Controller. As  you may see, under QPI, Core i7  processor can now directly access memory as they are equipped  with a memory control given directly on the processor die. The x58 and Socket 1366 Finally after so many years, Intel  replaced the socket LGA775. Intel Core i7 processor comes under a new  larger socket named LGA 1366 and LGA 1156 (core i5). Intel Core 2 platform has option to  chose from many available Intel or Nvidia or ATi chipsets where as till  now, Core i7 supports only one chipset, the Intel x58 but x58 seems to  out perform any and every available option of Core2 platform. <img src="http://www.chotocheeta.com/wp-content/uploads/2009/11/Intel_Core2_Core-i7_07.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Earlier one had to chose between either  ATi or Nivida as platform before selecting motherboard as with Core2 you  can either run SLi or CrossFire. But with x58 that problem is solved.  You can run any of these multi-GPU setup from x58 or rather single  motherboard. (But that doesn’t mean you can bridge 2  different company simultaneity) Compare to Core2 which can support both  DDR-III and DDR-II, Core i7 in combination with x58 is just DDR-III  only. It may sound a downer, but as DDR3 is becoming mainstream, your PC  should have the fastest option. Few new features Intel Demand Based Switching (DBS) Its a new form of  older version, that’s Intel SpeedStep. What it does is, it lowers the  processor frequency and power consumption under idle state when system  doesn’t require heavy processing. The processor returns to full power  only when OS requires. It saves a lot of energy and noise also as lower  frequency means less heat hence even the processor FAN can run at lower  RPM generating less noise. Intel® Turbo Boost  Technology Performance on demand, as what Intel calls it. It  allows Core i7 CPUs to actually overclock it self to run higher than its  original frequency. Just opposite of what (DBS) does. Turbo boost works  in tandem with Intel VT / Intel HT. Turbo boost actually can overclock  individual cores, when they are in need of extra juice under certainly  muti-core applications like heavy duty CAD / CAM or editing or  virtualizing. Along with these new features and  upgrades to existing technology, Intel Core i7 or Core i5 processors  make them self an excellent purchase over their predecessor. Therefore,  if you are looking for a new computer  with Intel based setup, try and see if you can get your self a Core i7  or Core i5 based system. Intel Core i7 processors are available  from USD 280 to $1000 where as there are hundreds of choice for  motherboards under <a href="http://www.chotocheeta.com/2009/01/17/list-of-motherboard-mainboard-for-intel-core-i7-quad-eight-processors-with-support-of-lga-1366/" target="_blank">LGA  1366</a> and <a href="http://www.chotocheeta.com/2009/11/25/list-of-available-motherboards-for-intel-core-i5-socket-lga-1156/" target="_blank">LGA  1156</a></blockquote>

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