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Ivy Bridge-E: Intel Core i7-4960X Processor Review

Author: Ryan Shrout
Subject: Processors
Manufacturer: Intel

The Core i7-4960X and EVGA X79 Dark Overclocking

There really isn't much to talk about when looking at the Core i7-4960X processor as you would expect.  The physical form factor is exactly the same as Sandy Bridge-E: a very large chip with a lot of pad connections on the bottom.

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Though I think this is expected after the SNB-E release, Intel is not including a cooler in the retail packaging with any IVB-E processors.  You'll have to buy an Intel-branded cooler or go for one of the many other options on the market.

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A benefit of continuing the use of the LGA 2011 socket is that most coolers available today will already support the X79 motherboards and the IVB-E processors announced today. 

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Along with today's launch of the Core i7-4960X, Intel's board team is also releasing the 4.2 edition of the Intel Extreme Tuning Utility that is a Windows-based tweaking and overclocking application.  It includes some new features like HWBOT integration and even social features to share UEFI settings.

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The X79 chipset also remains unchanged from the SNB-E launch to today - that means no USB 3.0 and only two SATA 6G ports.  Some motherboard vendors are going to release SKUs associated with the IVB-E launch but most are simply updating the UEFI firmware of existing boards to support the new processors.

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EVGA did send over the X79 Dark for our testing purposes, a new board released just a couple of weeks ago, and I definitely enjoyed my time with it.  The UEFI GUI is intuitive and speedy while the overclocking features are front and center for easy access and modification.  After a bit of a hurdle getting the Core i7-4960X booted for the first time, we were off and running.

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My lone concern with the board was the somewhat minimal overclock we got out of our CPU sample but we are waiting for updated boards from a couple other vendors to see if the limitation was CPU or MB based.


Overclocking the Core i7-4960X

Overclocking the new Ivy Bridge-E processor is pretty much identical to SNB-E.  With an unlocked multiplier you can easily push up the frequency with the help of some added voltage and then tweak memory timings from there. 

During preliminary discussions with a few MB vendors I had heard many reports of 4.5 GHz and even 4.6 GHz overclocks with the IVB-E parts floating around.  I was not so lucky.

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The highest 100% stable clock speed I was able to hit at 1.40v was 4.3 GHz with a 43x multiplier.  This was with PLL override enabled and with VDroop disabled.  I was able to run at 4.4 GHz for a very limited amount of time but in no condition I would recommend to a user.  At 1.4v though I was quite happy with the 73C temperatures of the 22nm, densely packed 1.68 billion transistors. 

Even pushing voltages up to 1.45v did not allow us to get any higher than 4.3 GHz.  I am pretty disappointed with this result even though we saw some impressive performance bumps at 4.3 GHz.  Keep in mind that this is 4.3 GHz on ALL CORES which is basically a 600 MHz increase over the stock setting (16% or so).

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September 3, 2013 | 04:07 AM - Posted by Boris (not verified)

"...a set of three of NVIDIA's GeForce GTX TITANs. At $999 MSRP, the TITAN is the fastest single GPU graphics card on the market and running three of them in SLI gives us a total of 18GB of graphics memory (!!)."

No it doesn't. VRAM is mirrored in SLI/CF. Therefore, three Titans still effectively have 6GB of VRAM.

September 3, 2013 | 08:04 AM - Posted by Irishgamer01

IF your a average gamer ....don't bother.
Love one but just cannot get over the price.

Not to be fanboy ish but shouldn't gamers be moving to 8 core
AMD. I know intel is faster, but two years down the road into xBONE and PS4 life cycle it might just be an advantage.

September 3, 2013 | 10:03 AM - Posted by YTech

8 Core is great, but from what I've heard, most games aren't well optimized for 8 cores.

Hence why most gamers used to recommend the 2 core CPU (Duo/Dual). Now, 4 cores is preferred. Eventually, most games will be optimized for 8 cores. I do recall seeing some new games that when it detect additional cores, it will utilize them.

However, note that more cores means lower clock-speed (Ghz) per core. So if you can't use those additional cores, performance is decreased.

As for other usages such as high computing task, 8 cores are recommended (e.i. Adobe software).

Cheers! :)

June 12, 2014 | 08:09 AM - Posted by Dominga (not verified)

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September 3, 2013 | 07:47 PM - Posted by Clayton (not verified)

I'm sure none of the reviewers have wanted to do this, for obvious reasons, and we probably won't know till more are in the wild, but I'd love to know if these have soldered IHSs or if I need to continue my tradition of de-lidding these things. It will influence my decision to a reasonable degree. I haven't seen mention of this on any of the reviews so far.

September 17, 2013 | 11:14 PM - Posted by Anonymous (not verified)

I've seen it somewhere.. Ivy-E is soldered to the IHS.

September 6, 2013 | 06:36 PM - Posted by Anonymous (not verified)

Any plans to test PCI Express 2.0 vs 3.0 on the "E" platforms?

September 9, 2013 | 05:12 PM - Posted by ZzzSleep (not verified)

There just isn't the single threaded IPC gains that we need for anybody to justify an upgrade from Sandy Bridge onwards. There's also no gains in overclocking headroom either, which makes the processor a pretty lackluster offering over the last generation from Intel.

September 9, 2013 | 10:43 PM - Posted by Dan (not verified)

What's up with the slow memory latency of the 4960X? Does having 4 memory channels affect the latency?

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