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Intel Core i7-3960X Extreme Edition

14 Nov 2011

The 2nd generation Intel Core i7-3960X Extreme Edition is a six core CPU with a clock speed of 3.3GHz (3.9GHz with Turbo Boost) and comes with its multiplier unlocked for overclockers and power users.

Tags: cpu, intel, processor, sandy bridge-e

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HWZ's Overall Rating: 8.5

Performance:

8.5

Features:

8.5

Value:

Great performance for those who can wield its power

Easy to overclock

Frugal power consumption

Integrated 40-lane PCIe controller with Gen 3 support

Very expensive

No bundled cooler

Quad-channel memory architecture offers little advantage to enthusiasts

<div id="reviews-list">
		<h2>More articles (2)</h2>
		<ul>
					<li >
			<a href="/feature-memory-channel-scaling-sandy-bridge-e-core-i7-3960x-experience" alt="/product-intel-core-i7-3960x-extreme-edition/review?review=236544">Memory Channel Scaling with Sandy Bridge-E - A Core i7-3960X Experience</a>			</li>
					<li class="current">
			<a href="/review-intel-core-i7-3960x-extreme-edition-sandy-bridge-e-has-arrived" alt="/product-intel-core-i7-3960x-extreme-edition/review?review=231971">Intel Core i7-3960X Extreme Edition - Sandy Bridge-E has Arrived</a>			</li>
				</ul>
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	<div id="product-review" class="article">
			<h2 class="header-green">Intel Core i7-3960X Extreme Edition - Sandy Bridge-E has Arrived</h2>
		<span class="byline">Reviewed by Wong Chung Wee & Vijay Anand on Monday, 14 Nov 2011</span>
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		 		<h2 class="page-title">It is Not Just a Suffix - A Detailed Look at the Sandy Bridge-E</h2>
		 		<h3 class="page_title">Sandy Bridge Evolved for Workstation Deployment</h3>
<p>When Intel's <a href="http://www.hardwarezone.com.sg/product-feature-intels-sandy-bridge-next-gen" target="_blank">Sandy Bridge microprocessor architecture</a> based processors debuted in January this year, it brought a massive leap in performance&nbsp; for the mainstream users at a reasonable price point. In fact, its performance leap was so good that it ate into the expensive enthusiast segment of products that used the <a href="http://www.hardwarezone.com.sg/feature-intel-x58-motherboards-support-sli-natively" target="_blank">Intel X58 platform</a> to support the <a href="http://www.hardwarezone.com.sg/product-feature-changing-future-intels-core-i7" target="_blank">Nehalem</a> and <a href="http://www.hardwarezone.com.sg/review-intels-hexa-strike-core-i7-980x-extreme-edition" target="_blank">Westmere</a> based processors. These processors used an earlier generation of the Core microarchitecture and were the best in class since late 2008.&nbsp;</p>
<p>Consequently with the launch of the Sandy Bridge based processors, adoption of the lntel X58 platform almost grew to a halt because the mainstream audience and their workloads don't benefit from such a complex processor. After all, both Nehalem and Westmere were workstation class CPUs which Intel repackaged them to also offer something powerful for enthusiasts and serious home content creators who use professional grade software in tandem with high workloads to benefit from these processors. They were also often sought after by overclocking enthusiasts to push the performance envelope and tweak their system to their heart's content.</p>
<p>So was the enthusiast segment neglected after Sandy Bridge? On the contrary, Intel was busy qualifying an updated architecture for the workstation segment. Codenamed the <strong>Sandy Bridge-E</strong> architecture, it has all of what the original Sandy Bridge architecture has (minus the integrated graphics engine) and adds on a few more updates to make it the meanest enthusiast processor they've created.</p>
<p>Since our sneak peeks of the Sandy Bridge-E processors in September at this year's <a href="http://www.hardwarezone.com.sg/product-feature-idf-2011-x79-motherboards-and-sandy-bridge-e-spotted" target="_blank">Intel Developers Forum,(IDF 2011)</a>, we have waited with bated breath for its arrival. And from various leaked slides sprouting around the net, we've long since confirmed that the top of the line new offering is the Intel <strong>Core i7-3960X</strong> Extreme Edition CPU which is also fondly referred to as the 2nd generation of Core i7 Extreme Edition processors. Our appetite was further whetted when <a href="http://www.hardwarezone.com.sg/features/tagged/2736-x79" target="_blank">X79 motherboards</a> (the new platform supporting the Sandy Bridge-E) started to be delivered at our doorsteps but there was still no sight of the processor. With its arrival today, it marks added impetus of Intel&rsquo;s Tick-Tock strategy in an effort to maximize its now mature 32nm manufacturing process (and for informational sake, we're still in the &quot;Tock&quot; portion of the cadence since Sandy Bridge-E is a natural evolution of the initial Sandy Bridge architecture). So lets get started with all you need to know of the new processors in detail.</p>
<p class="rtecenter"><img height="446" width="450" src="/files/img/2011/11/Sandy-Bridge-E-left-side-resized.jpg" title="The new enthusiast class processors." alt="" /></p>
<p>&nbsp;</p>
<h3 class="page_title">Architecture Differences from Nehalem / Westmere<br />
&nbsp;</h3>
<h4 class="page_sub_title">Quad-Channel Memory Controller</h4>
<p>In terms of big ticket features, the Sandy Bridge-E is the first-ever consumer processor architecture (and as well as its platform) to support a <strong>quad-channel DDR3 memory architecture</strong>! Not only that, the default supported memory speeds go up to <strong>1600MHz DDR</strong> in addition to 1333MHz and 1066MHz still being options too. Now this is a massive thrust in memory bandwidth. While impressive, it's not going to help most enthusiasts other than than the most demanding content creation tasks.</p>
<p>Taking a step back to contrast from Nehalem, Intel's first serious processor for the hardcore enthusiast and home workstation segment, it was also the first Intel CPU to integrate the memory controller on the die. It was also the first consumer platform to support a tri-channel memory controller instead of the dual-channel version which was already common. However as we've found, the extra memory controller was of <a target="_blank" href="http://www.hardwarezone.com.sg/product-feature-changing-future-intels-core-i7/results-sysmark-2007-preview-8">little assistance</a> as the platform had more than enough bandwidth. Going by the fact that even the current dual-channel memory architecture based Sandy Bridge isn't memory starved, you'll soon see that all the extra memory channels isn't going to benefit the typical enthusiast. Clearly, this processor has its roots for the multi-processor market.</p>
<h4 class="page_sub_title">6 Cores and Beyond?</h4>
<p>The Sandy Bridge-E architecture currently supports up to <strong>6 processing cores</strong> support up to <strong>12 execution threads</strong> in parallel if <strong>HyperThreading</strong> is fully taken advantage of. This aspect is no different from the first generation Core i7 processors such as the <a target="_blank" href="http://www.hardwarezone.com.sg/review-intels-hexa-strike-core-i7-980x-extreme-edition">Intel Core i7-980X and 990X</a>, which were the first six-core iterations from Intel. Even the <strong>32nm </strong>process technology used to fabricate both architectures are similar. However, this is probably where the similarities end.</p>
<p class="rtecenter"><img height="402" width="450" alt="" src="/files/img/2011/11/Core_I7_LGA_2011_Die_M.jpg" title="The Core i7-3960X processor die in its full glory. Notice the unlabelled portions of the die above the memory controller, it is said that this processor will be replaced by the i7-3980X processor which is rumored to sport eight cores making it the first consumer octacore Intel processor." /></p>
<p>While Intel has shared the die structure of the Sandy Bridge-E processor, they've mysteriously not labelled two areas of the die which resemble yet another two cores. If you put together this <a target="_blank" href="http://wccftech.com/intel-roadmap-leaks-sandy-bridgee-details-core-i7-3980x-extreme-edition-processor-revealed/">rumor</a> of an upcoming 8-core Sandy Bridge-E processor to eclipse the current top of the line Core i7-3960X in Q4 2012 as well as the above die structure, it kind of makes sense that the Sandy Bridge-E architecture really does support eight CPU&nbsp;cores. But we'll have to wait for many more months before that takes place.</p>
<h4 class="page_sub_title">Integrated PCIe Gen 3 Capable Controller</h4>
<p>That's not all, Sandy Bridge-E is also the first enthusiast class CPU&nbsp;architecture to fully integrate a <strong>PCIe controller</strong> on board and it support <strong>40 PCIe lanes</strong>. This is a stark contrast against the the old Nehalem and Westmere cores, which don't have a PCIe controller and needed to rely on the Intel X58 Platform Controller Hub (PCH) chipset to <a target="_blank" href="http://www.intel.com/products/desktop/chipsets/x58/x58-overview.htm">support 36 PCIe lanes</a>. So the Sandy Bridge-E is living up to its mainstream brother to integrate all the needed functions within the CPU (minus the GPU) with the exception of the some common I/O functions that will as usual be handled by the IOH chipset. However, unlike the Sandy Bridge which supports just 16&nbsp;PCIe 2.0 lanes from its core, the Sandy Bridge-E will presumably support 40&nbsp;PCIe 3.0 lanes. We say presumably because Intel hasn't been able to qualify the platform and CPU capabilities with a real PCI 3.0 x16 card and as such, marketing materials still officially mention PCIe 2.0 support only. With 40 lanes, the CPU alone can support the following PEG configurations:-</p>
<ul>
    <li>Dual PCIe x16 slots + Single PCIe x8 slot</li>
    <li>Single PCIe x16 slot + Triple PCIe x8 slots</li>
    <li>Single PCIe x16 slot + Dual PCIe x8 slots + Dual PCIe x4 slots</li>
</ul>
<p>This is probably the only reason why an ardent gamer would be keen to get the Sandy Bridge-E platform - to take advantage to the new architecture and its massive built-in support for multi-way graphics card support. Both 3-way SLI and CrossFireX would be supported on most major brands, pending the actual board implementation. As for PCIe 3.0 support, that's a bit sticky for now. Even if Intel's claims of possible support for 8GT/s PCIe transfer rate does come to pass after qualifications, consumers have to also ensure their motherboard's PCIe switching components that distribute the PCIe lanes are capable of operating at those high speeds to truly support PCIe 3.0. Else, it would just be PCIe 3.0 compatible. MSI has already <a target="_blank" href="http://www.techpowerup.com/151718/MSI-Calls-Bluff-on-Gigabyte-s-PCIe-Gen-3-Ready-Claim.html">clarified their implementation</a> versus Gigabyte's claim on this matter for the Z68 mainstream chipset, but it's valuable information to ensure you know what marketing you're buying into. As far as we know, MSI and ECS&nbsp;both use a true PCIe 3.0 implementation for their X79 motherboards at this point of time but more information on other vendors will follow soon in the future.</p>
<h4 class="page_sub_title">More L3 Cache + All the Sandy Bridge Goodness</h4>
<p>To support the massive memory throughput and functions integrated within this huge processor, the Sandy Bridge-E will have up to <strong>15MB&nbsp;of L3 cache</strong>. The current top of the line Core i7- 3960X will feature this this wile other variants would have lesser L3 cache.</p>
<p>Last but not least, like the Sandy Bridge architecture, the newer Sandy Bridge-E supports HyperThreading, Intel Turbo Boost 2.0 and Trusted Execution  Engine features. It also support all the new instruction sets introduced  to-date such as VT-x, VT-d, VT-c, AES, AVX, SSE 4.1 and SSE4.2 for  hardware assisted virtualization, speedier encryption and decryption  using the Advanced Encryption Standard, and Advanced Vector Extensions  (AVX) instruction set to benefit floating point intensive applications  such as a digital photo editing and content creation to accelerate  motion, facial recognition tracking as well as computational simulation  and analysis.</p>
<p>&nbsp;</p>
<h3 class="page_title">A Newer and Larger Socket - LGA2011</h3>
<p>With all the above features and functions crammed into the Sandy Bridge-E processor, its transistor count has shot up to 2.27 billion! This is double that of the Westmere architecture (sporting six cores too) at 1.17 billion transistors. With both of them also fabricated with the 32nm process technology, you can easily guess that the die size too has nearly doubled from 248mm<sup>2</sup> on Westmere to 435mm<sup>2</sup> on the Sandy Bridge-E. This is one expensive chip to manufacture. Now that so much is on the processor, it needs more power and data lines, not to mention a much wider memory path to support quad memory channels, inevitably, a new socket is needed to support its infrastructure. Enter the LGA2011.</p>
<p class="rtecenter"><img alt="" title="The LGA2011 CPU socket is larger than the usual CPU sockets found on consumer computing platform with its 2,011 pins! This is mostly the result of a quad-memory controller implementation, integrated PCIe controller with 40 PCIe lanes and more power/control lines to manage this complex CPU. After all, this is a workstation-class processor. Extra caution must be exercised in mounting the Sandy Bridge-E processor as the sheer number of pins translate to higher risks of them being bent due to carelessness." src="http://www.hardwarezone.com.sg/files/img/2011/10/Socket_M.jpg" /></p>
<p class="rtecenter"><img height="253" width="450" alt="" title="Compared here is the new top of the line Core i7-3960X LGA2011 packaged processor on the right versus an LGA1366 processor to the left which is represented by our Core i7-980X Extreme Edition." src="/files/img/2011/11/2011_1366_Jux_Front_M_1.jpg" /></p>
<p class="rtecenter"><img height="251" width="450" alt="" title="Shown here on their backs is their contact pads interfacing with the motherboard socket. On the left, the LGA1366 faces off with the LGA2011 on the right." src="/files/img/2011/11/2011_1366_Jux_Back_M.jpg" /></p>
<p class="rteleft">As mentioned, the increase in die size of Sandy Bridge-E processors can be attributed to the integration of a complex memory controller and PCIe controller in addition to the new features and larger cache. Increased data and power lines are required to support all of its functions and this this results in a larger package with far more contact pads on the processor and an identical number of contact points on the CPU&nbsp;socket, 2,011 to be exact.</p>
<p class="rteleft">&nbsp;</p>
<h3 class="page_title">Sandy Bridge-E Processor Models Compared</h3>
<p class="rteleft">With information gleaned from our press kit, Intel has announced  three desktop versions of the Sandy Bridge-E processors. The top of the  line offering is the Intel Core i7-3960X CPU Extreme Edition. Second in line is a Core i7-3960K and fortunately as its suffix suggests, it's also unlocked. For those wondering about the suffix differences, &quot;X&quot; denotes a the CPU as Intel's top processor, is multiplier unlocked, and is tagged with the traditional US$1,000 pricing or thereabout. &quot;K&quot; on the other hand just denotes that its a multiplier unlocked processor.</p>
<p class="rteleft">The last model is the Core i7-3820, a quad-core edition which will be launched in early 2012. No pricing information has been shared of it yet. For now, we've prepared two tables to compare the new Core i7 processors against the previous generation Core i7 processors:-&nbsp;</p>
<table cellspacing="1" cellpadding="1" border="1" align="center" width="95%" style="">
    <caption>The 2nd Generation Core i7 Processors (Sandy Bridge-E)</caption>
    <tbody>
        <tr>
            <td class="rtecenter"><strong>Processor Model<br />
            </strong></td>
            <td class="rtecenter"><strong>Clock Speed</strong></td>
            <td class="rtecenter"><strong>Cores/Threads</strong></td>
            <td class="rtecenter"><strong>L3 Cache</strong></td>
            <td class="rtecenter"><strong>Direct Media Interface Gen 2 (DMI2)</strong></td>
            <td class="rtecenter"><strong>Max TDP (W)</strong></td>
            <td class="rtecenter">
            <p><strong>Retail Price (US$) </strong><strong>(1k units)<br />
            </strong></p>
            </td>
        </tr>
        <tr>
            <td class="rtecenter">Core i7-3960X Extreme Edition</td>
            <td class="rtecenter">3.3GHz <br />
            (3.9 GHz Max Turbo Frequency)</td>
            <td class="rtecenter">6/12</td>
            <td class="rtecenter">15MB</td>
            <td class="rtecenter">20Gb/s</td>
            <td class="rtecenter">130</td>
            <td class="rtecenter">$990</td>
        </tr>
        <tr>
            <td class="rtecenter">Core i7-3930K</td>
            <td class="rtecenter">3.2GHz <br />
            (3.8 GHz Max Turbo Frequency)</td>
            <td class="rtecenter">6/12</td>
            <td class="rtecenter">12MB</td>
            <td class="rtecenter">20Gb/s</td>
            <td class="rtecenter">130</td>
            <td class="rtecenter">$555</td>
        </tr>
        <tr>
            <td class="rtecenter">Core i7-3820</td>
            <td class="rtecenter">3.6GHz <br />
            (3.9 GHz Max Turbo Frequency)</td>
            <td class="rtecenter">4/8</td>
            <td class="rtecenter">10MB</td>
            <td class="rtecenter">20Gb/s</td>
            <td class="rtecenter">130</td>
            <td class="rtecenter">N.A.<br />
            (to be announced in Q1, 2012)</td>
        </tr>
    </tbody>
</table>
<p>&nbsp;</p>
<table cellspacing="1" cellpadding="1" border="1" align="center" width="95%">
    <caption>The First Generation Core i7 Processors (Westmere / Nehalem)</caption>
    <tbody>
        <tr>
            <td class="rtecenter"><strong>Processor Model<br />
            </strong></td>
            <td class="rtecenter"><strong>Clock Speed</strong></td>
            <td class="rtecenter"><strong>Cores/Threads</strong></td>
            <td class="rtecenter"><strong>L3 Cache</strong></td>
            <td class="rtecenter"><strong>QuickPath Interconnect</strong></td>
            <td class="rtecenter"><strong>Max TDP (W)</strong></td>
            <td class="rtecenter"><strong>Retail Price (US$) (1k units)<br />
            </strong></td>
        </tr>
        <tr>
            <td class="rtecenter">Core i7-990X&nbsp;Extreme Edition</td>
            <td class="rtecenter">3.46GHz <br />
            (3.73 GHz Max Turbo Frequency)</td>
            <td class="rtecenter">6/12</td>
            <td class="rtecenter">12MB</td>
            <td class="rtecenter">6.4QT/s</td>
            <td class="rtecenter">130</td>
            <td class="rtecenter">$999</td>
        </tr>
        <tr>
            <td class="rtecenter">Core i7-980X&nbsp;Extreme Edition</td>
            <td class="rtecenter">3.33GHz <br />
            (3.6 GHz Max Turbo Frequency)</td>
            <td class="rtecenter">6/12</td>
            <td class="rtecenter">12MB</td>
            <td class="rtecenter">6.4QT/s</td>
            <td class="rtecenter">130</td>
            <td class="rtecenter">$999</td>
        </tr>
        <tr>
            <td class="rtecenter">Core i7-980</td>
            <td class="rtecenter">3.33GHz <br />
            (3.6 GHz Max Turbo Frequency)</td>
            <td class="rtecenter">6/12</td>
            <td class="rtecenter">12MB</td>
            <td class="rtecenter">4.8QT/s</td>
            <td class="rtecenter">130</td>
            <td class="rtecenter">$583</td>
        </tr>
        <tr>
            <td class="rtecenter">Core i7-975 Extreme Edition</td>
            <td class="rtecenter">3.33GHz <br />
            (3.6 GHz Max Turbo Frequency)</td>
            <td class="rtecenter">4/8</td>
            <td class="rtecenter">8MB</td>
            <td class="rtecenter">6.4QT/s</td>
            <td class="rtecenter">130</td>
            <td class="rtecenter">~$969</td>
        </tr>
    </tbody>
</table>			</div>
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					.grab (img)
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//]]>
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