Technology Explained

So What’s the Difference Between Intel’s Haswell and Ivy Bridge CPUs?

Kannon Yamada 22-04-2014

Looking for a new computer? Those shopping for a new Intel-powered laptop or desktop need to know the differences between the last and the latest generation of Intel processors. As with previous generations, Intel maintains a “tick” and “tock” update cycle of its CPU technology. Tocks indicate architecture upgrades, whereas Ticks represent a “die-shrink”.


The last generation “Ivy Bridge What You Need To Know About Intel’s Ivy Bridge [MakeUseOf Explains] Intel has just released its new updated processor, code-named Ivy Bridge, for both desktops and laptops. You’ll find these new products listed as the 3000 series and you can buy at least some of them... Read More ” differs in small, but important ways from the current generation, “Haswell”. Knowing the finer points of Intel’s system will make the difference between getting three or nine hours of laptop battery life. The key to understanding the difference lies in Ticks and Tocks.

Intel’s Tick and Tock Upgrade Cycle

Intel’s update schedule revolves around two kinds of updates, released every 18-months, codenamed as Ticks and Tocks.

intel clock tick tock

What’s a Tick?

When Intel shrinks the die (where the CPU cores and other components sit) by, using a smaller production process, it causes a reduction in the power required by the chip. Consequently, heat production and power requirements drop. Currently, both Haswell and Ivy Bridge use a 22-nm production process. Note, though, that the upcoming Broadwell CPU will use the 14-nm production process and is rumored to use substantially less power than even Haswell.

What’s a Tock?

Currently, Haswell represents a “Tock” in the upgrade cycle, meaning it’s a new microarchitecture and thus (on desktops) uses the new LGA1150 socket. Almost always, “tocks” result in a socket change. Each CPU also comes with a corresponding motherboard and chipset. Chipsets provide a number of functions neccessary for your computer to run. In recent years, there’s been a trend to move chipset features directly onto the CPU. For example, the former Southbridge and Northbridge systems were further reduced in Haswell. Many features normally contained within the Southbridge and Northbridge were moved onto Intel’s Platform Controller Hub chip. Haswell covers the Z87 chipset and Ivy Bridge covers the Z77 and the Series 6 (which it shares with Sandy Bridge) chipsets. The shift improves system performance.


Power Reduction and Mobile

As with all CPU technologies, the mobile versions of desktop CPUs offer reduced power requirements and lower heat production. They manage to offer such improvements by also reducing their frequencies and number of cores. Any CPU name that includes a “U”, or “Y” (“M” CPUs are not CULV) added to its end, such as Core i7-4610Y, is a mobile (designated as Consumer Ultra-Low Voltage) variant. The first number following the iX- represents the generation of CPU. A “3” means Ivy Bridge and a “4” means Haswell. Unfortunately, in its Pentium and Celeron range of CPUs (which also can use the Haswell architecture), Intel discards its nomenclature.

In its Haswell design, Intel chose to focus specifically on lower power requirements. This fact stands out when examining the battery life of Ivy Bridge against Haswell laptops. In general, mobile Haswell chips offer a near doubling of battery life over Ivy Bridge. All CULV variants have two cores instead of four. CULV processors are distinct from CPUs with an “M” appended to the end. M-appended CPUs can offer up to four cores, but require more power.

laptop and mobile

Z87 Chipset and Its Derivatives

An important upgrade from Ivy Bridge to Haswell lies in its corresponding chipset. Z87 offers a feature known as “Quick Sync“, which allows users to quickly transfer media files between devices. While Quick Sync existed since Sandy Bridge, the predecessor to Ivy Bridge, it has since developed into a powerhouse for quick movement, and on-the-fly transcoding of video files. The Z87 chipset also allows overclocking of the CPU, RAM and GPU.


There has been a continuing trend among chipset development to move chipset components from the motherboard to the CPU. In Haswell, the biggest change is the movement of the voltage regulator from the motherboard to the CPU. This results in higher temperatures and reduced power consumption. This move clearly shifted Intel’s design focus from the desktop to mobile.

It’s also important to note that there are different variants of the Z87 out there, including the lower-end B85, Q85, Q87, H81 and H87.


Faster CPU Performance

The per-core performance of Haswell remains only marginally above that of Ivy Bridge. In layman’s terms this means that Haswell isn’t appreciably faster than Ivy Bridge. Benchmarks indicate only a few percentile points of difference between the last few generations of Intel processor.


Keep in mind that Intel’s CPU performance trounces its competition from AMD, both in mobile and in desktop platforms.

Overclocking Ability

Like Ivy Bridge, Haswell offers poor overclocking potential. This extends primarily from two factors: First, the integration of the voltage regulator into the CPU and, second, Intel’s controversial decision to cease using soldered on TIM Two Ways to Cool Down Your Defective Overheating Intel CPU Looking to purchase a Haswell or Ivy Bridge Intel CPU? A secret may change your mind. According to bloggers, Intel recently got caught using thermal paste on its CPUs and lying about it – the... Read More and instead use (what some refer to as ‘cheap’) thermal paste between the integrated heat spreader and the die of the CPU. Also, the integrated voltage regulator in Haswell limits its overclocking potential. Overall, Ivy Bridge overclocks its frequency slightly more than Haswell.

Fortunately, it appears that Intel listens to its customers – they recently announced that they would improve the thermal compound used in their CPUs. However, whether or not they decide to return to soldered on TIM remains unknown.

Haswell can provide better performance after overclocking, relative to Ivy Bridge, as the Z87 chipset allows a greater number of variables to be tampered with. But in the end, the total percentage in performance gained through overclocking potential falls short of older CPUs and AMD’s offerings. In short, due to IPC improvements (Haswell CPUs are slightly faster at the same frequencies than Ivy Bridge by default), overclockers will get slightly better performance out of Haswell compared to Ivy Bridge. Though, overclocking seems to be on the way out.


Integrated Graphics

In the jump from Ivy Bridge, Intel made major changes to Haswell’s integrated graphics. These improvements serve to stratify Intel’s mobile chip offerings. For example, on higher end mobile platforms Iris Pro is designated by “HQ” being appended onto the Core iX-XXXX designation, as mentioned earlier. On HQ model CPUs, you receive the sublime Iris Pro 5200. On the desktop and on other mobile CPUs, you receive access to HD4400 and HD4600 GPUs, which isn’t exactly Iris Pro, but is fairly competitive with AMD’s integrated graphics (what’s an APU? What Is an APU? The Accelerated Processing Unit, Explained Checking out computer parts for an upgrade? You might have seen an "APU". What is it and how does an APU differ from a CPU? Read More ). Unfortunately, Iris Pro remains prohibitively expensive.

In short, if you need graphics over single-threaded processing power in the low-end market, you should choose an AMD chipset. If you have the money to spare, consider getting a more expensive Intel laptop. However, be aware of which CPUs offer Iris Pro (see below, under “Mobile and Laptop“).

trigate transistor

What CPU is Right for You?

Two distinct markets exist for Haswell and Ivy Bridge CPUs: desktop and mobile. But how do you know whether the lower prices offered by the previous generation outweigh the advances made in Haswell?


On the desktop the biggest difference is the Z87 chipset that accompanies Haswell. As mentioned earlier, Z87 offers Quick Sync among other improvements. However, unless you use these features, the only reason to purchase Haswell is the potential to upgrade the CPU in the upcoming Broadwell release, which also uses the LGA1150 socket.

On the downside, Haswell doesn’t represent a substantial increase in processing power over Ivy Bridge. In truth, Haswell manages to squeeze out only a few percentage points in single-threaded performance. If you are looking for gaming or other performance increases, you won’t really notice the difference between Haswell and Ivy Bridge.

Mobile and Laptop

Haswell represents a rather large upgrade over Ivy Bridge in terms of battery efficiency and integrated graphics – both key considerations on the mobile platform. As a result, I don’t really consider Ivy Bridge to be competitive to Haswell in the mobile market, particularly since there doesn’t appear to be a large price differential between the two in that market segment. In terms of overall value, consumers get more from Haswell devices on laptops.

It’s also worth noting that the latest generation of Atom CPUs (which were unfortunately rebranded as Celeron and Pentium CPUs) finally integrate its Atom series processor with some of the major innovations made in the Ivy Bridge architecture, such as the integrated GPU and Tri-gate transistor design. The final product (such as the Celeron J1900) offers a ridiculous performance-to-watt ratio. However because of intentional attempts to confuse consumers, it’s difficult to know whether or not you’re getting an Atom-derived Pentium or Celeron or a Haswell, Ivy Bridge or older Celeron or Pentium. Make sure to research each CPU to make sure if it’s of the right architecture.

intel mobile laptop


In a nutshell, for those buying a mobile device, Haswell offers quite a bit, including appreciably better battery performance and improved integrated graphics. For those buying desktops, you don’t gain a substantial amount of performance from Haswell CPUs, but you do get a really great chipset in the Z87 (and its derivatives).

Image Credits: lungstruck Via Flickr

Related topics: CPU, Intel.

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  1. BEBlair
    February 16, 2016 at 11:08 am

    With Intel the value is in the Non-K chips! So with Haswell non-K chips being completely locked their is no value in it! That is why I bought a i5-3470 instead of a Haswell nonK. And I also saved over $80! Also their is zero benefit with Haswell! Every feature Haswell has Ivy has.

  2. Tommy
    January 12, 2015 at 9:56 am

    How is it that the N2830 is low consumption on better than the 2955U, but @ upto 2.4Ghz wit hthe N2830 the 2955U @ 1.4Ghz well outperforms ?

    • Kannon Y
      January 14, 2015 at 10:30 pm

      They use different architectures (IIRC). The N2830 is "Atom" based and the Celeron 2955U (I think) is a BGA version of Haswell. There's also different standards for power efficiency. There's performance-per-watt and total wattage. For certain workloads, a faster processor might be more power efficient than a slower, lower-wattage CPU.

      Also power consumption is not linear and it can be much higher at different voltages.

  3. Joe
    May 5, 2014 at 3:44 pm

    "Overall, Ivy Bridge overclocks slightly better than Haswell." "Overall, Haswell represents a better overclocking platform than Ivy Bridge". This isn't confusing to users AT ALL.

    • Kannon Y
      May 5, 2014 at 7:25 pm

      Hey Joe, I apologize for botching that paragraph. I have tried to clean up the language a bit. Thanks for helping me out!

      Here's a quick summary of what I actually meant:

      Haswell is faster at the same frequencies than Ivy Bridge, so while Ivy Bridge can hit a higher maximum frequency when overclocked, Haswell still provides better performance as an overclocked platform. But the difference is only marginal.

  4. James
    April 24, 2014 at 12:29 am

    Still as confusing as hell Intel. Way too many variations just for the heck of it and changing names around ("It’s difficult to know whether or not you’re getting an Atom-derived Pentium or Celeron or a Haswell, Ivy Bridge or older Celeron or Pentium") is just dumb. Complex for the sake of complexity?

  5. Stephen
    April 23, 2014 at 12:41 pm

    This article couldn't have come at a better time. I recently upgraded my aging desktop (AMD socket 939) to an Intel-based system (LGA1155, Ivy Bridge), but was having second thoughts about if I should have gone with Haswell instead. Thanks for clearing things up!

  6. Speeder
    April 23, 2014 at 9:37 am

    Informative and a great article! Kepp it up! :)

  7. KT
    April 22, 2014 at 8:37 pm

    14nm! My old Linux workhorse pc is still running a 90nm cpu! The old AMD FX-60 draws as much juice and heat as a tanning bed, but it still does what I need. My Windows gaming pc has a 45nm. I'll get with the times someday (and 7nm will come out the following day!)

    • Kannon Y
      April 22, 2014 at 9:56 pm

      Nice! In all fairness, CPUs from many years ago feel about as snappy for average computing tasks as those on the bleeding edge of technology. Aside from the anecdote on the wattage (hilarious!), there's less and less need to upgrade as there used to be. Thanks for sharing!