Author:
Subject: Processors
Manufacturer: Intel

A refresh for Haswell

Intel is not very good at keeping secrets recently. Rumors of a refreshed Haswell line of processors have been circulating for most of 2014.  In March, it not only confirmed that release but promised an even more exciting part called Devil's Canyon. The DC parts are still quad-core Haswell processors built on Intel's 22nm process technology, but change a few specific things. 

Intel spent some time on the Devil's Canyon Haswell processors to improve the packaging and thermals for overclockers and enthusiasts. The thermal interface material (TIM) that lies in between the die and the heat spreader has been updated to a next-generation polymer TIM (NGPTIM). The change should improve cooling performance of all currently shipping cooling solutions (air or liquid), but it is still a question just HOW MUCH this change will actually matter. 

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You can also tell from the photo comparison above that Intel has added capacitors to the back of the processor to "smooth" power delivery. This, in combination with the NGPTIM, should enable a bit more headroom for clock speeds with the Core i7-4790K.

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In fact, there are two Devil's Canyon processors being launched this month. The Core i7-4790K will sell for $339, the same price as the Core i7-4770K, while the Core i5-4690K will sell for $242. The lower end option is a 3.5 GHz base clock, 3.9 GHz Turbo clock quad-core CPU without HyperThreading. While a nice step over the Core i5-4670K, it's only 100 MHz faster. Clearly the Core i7-4790K is the part everyone is going to be scrambling to buy.

Another interesting change is that both the Core i7-4790K and the Core i5-4690K enable support for both Intel's VT-d virtualization IO technology and Intel's TSX-NI transactional memory instructions. This makes them the first enthusiast-grade unlocked processors from Intel to support them!

As Intel states it, the Core i7-4790K and the Core i5-4690K have been "designed to be used in conjunction with the Z97 chipset." That being said, at least one motherboard manufacturer, ASUS, has released limited firmware updates to support the Devil's Canyon parts on Z87 products. Not all motherboards are going to be capable, and not all vendors are going to the spend the time to integrate support, so keep an eye on the support page for your specific motherboard.

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The CPU itself looks no different on the top, save for the updated model numbering.

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Core i7-4790K on the left, Core i7-4770K on the right

On the back you can see the added capacitors that help with stable overclocking.

The clock speed advantage that the Core i7-4790K provides over the Core i7-4770K should not be overlooked, even before overclocking is taken into consideration. A 500 MHz base clock boost is 14% higher in this case and in those specific CPU-limited tasks, you should see very high scaling.

Continue reading our review of the Intel Core i7-4790K Devil's Canyon CPU!!

More hints on Devil's Canyon

Subject: General Tech | June 3, 2014 - 11:47 AM |
Tagged: Intel, i7-4790k, devil's canyon, computex 2014, computex, 4790k

The biggest improvement for overclockers on the new Devil's Canyon processors goes by the name of Next-Generation Polymer Thermal Interface Material; which will replace the much maligned TIM used on Haswell chips that many have blamed for poor overclocking results.  So far the news is good but as no samples have arrived anywhere for review we still await the final word.  As it is an LGA 1150 processor the current heatsinks will cool this chip and in theory a BIOS/UEFI update should allow them to run on current Z87 boards making it a very easy upgrade.  As you can see in the list the speeds are raised slightly from the previous generation, check out the other features [H]ard|OCP heard about right here.

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"Intel is presenting its new Devil's Canyon processors today at Computex in Taiwan. Enthusiasts get a two new processor solutions, one with HyperThreading and one without. While many of us are familiar with processor core clocks of 4GHz+, this is first time we have Intel serving up a minimum 4GHz clock on its enthusiast K processor."

Here is some more Tech News from around the web:

Tech Talk

Source: [H]ard|OCP

Computex 2014: Intel Officially Releases Devil's Canyon, Core i7-4790K

Subject: Processors | June 2, 2014 - 11:30 PM |
Tagged: Intel, i7-4790k, devil's canyon, computex 2014, computex, 4790k

Back in March, we learned from Intel that they were planning to release a new Haswell refresh processor targeted at the overclocking and gaming market, code named Devil's Canyon. As we noted then, this new version of the existing processors will include new CPU packaging and the oft-requested improved thermal interface material (TIM). What wasn't known were the final clock speeds and availability time lines.

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The new Core i7-4790K processor will ship with a 4.0 GHz base clock with a maximum Turbo clock rate of 4.4 GHz! That is a 500 MHz increase in base clock speed over the Core i7-4770K and should result in a substantial (~10-15%) performance increase. The processor still supports HyperThreading for a total of 8 threads and is fully unlocked for even more clock speed improvements.

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All of the other specifications remain the same - HD Graphics 4600, 8MB of L3 cache, 16 lanes of PCI Express, etc.

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Intel spent some time on the Devil's Canyon Haswell processors to improve the packaging and thermals for overclockers and enthusiasts. The thermal interface material (TIM) that is between the top of the die and the heat spreader has been updated to a next-generation polymer TIM (NGPTIM). The change should improve cooling performance of all currently shipping cooling solutions (air or liquid) but it is still a question just HOW MUCH this change will actually matter. 

You can also tell from the photo comparison above that Intel has added capacitors to the back of the processor to "smooth" power delivery. This, combined with the NGPTIM should enable a bit more headroom for clock speeds with the Core i7-4790K.

slides08.jpg

In fact, there are two Devil's Canyon processors being launched this month. The Core i7-4790K will sell for $339, the same price as the Core i7-4770K, while the Core i5-4690K will sell for $242. The lower end option is a 3.5 GHz base clock, 3.9 GHz Turbo clock quad-core CPU without HyperThreading. While a nice step over the Core i5-4670K, it's only 100 MHz faster. Clearly the Core i7-4790K is the part everyone is going to be scrambling to buy.

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Not to be left out, Intel is offering an unlocked Pentium processor for users on a tighter budget. This dual core CPU runs at 3.2 GHz base frequency and includes not just HD Graphics but support for QuickSync video. 

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At just $72, the Pentium G3258 will likely be a great choice for gamers that lean towards builds like the one we made for the Titanfall release.

I was hoping to have a processor in hand to run benchmarks and overclocking testing on, but they haven't quite made it to the office yet. The 4.0 GHz clock speed is easily emulated by any 4770K and some BIOS tweaks but the additional overclocking headroom provided by the changed thermal interface is still in question. Honestly, based on conversations with motherboard vendors, Devil's Canyon headroom is only 100-200 MHz over the base Haswell parts, so don't expect to reach 6.0 GHz all of the sudden.

Later in the week we'll have the Core i7-4790K in hand and you can expect a full review shortly thereafter.