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Watching desktop CPU evolution over the last few years has been a lesson in limitations. When pure clock speed proved to be an insurmountable barrier, multi core became the solution. It didn't take too long to get to quad core, and, when it became clear that we were never going to have multithread-optimised software everywhere, architecture overhauls came along, trying to squeeze out the best instructions per clock (IPC) that they could. While there are server and enthusiast chips with more cores, the consumer market has remained at quad, and will do so well into Intel's next CPU revision, Haswell. To go further at this point in time simply doesn't benefit the mainstay of consumers.
And so, the game has become one of architecture refinement, which Intel's tick-tock release schedule suits particularly well. Once upon a time, a new architecture meant a new manufacturing process as well, a daunting feat to manage, and one that meant longer release times between chips. As yields improved, clock speeds of a particular architecture would slowly go up.
Not so anymore. Like the software world, these days it's about more rapid iteration, with less architectural changes between revisions. For Intel, this means iterating and optimising on previous architecture for the first year — tock — then revising by shrinking the die process for better thermal management and potential extra clock headroom the next — tick.
The tick serves an extra purpose: it allows Intel to get used to a particular manufacturing process before applying a new architecture to it, nicely insulating the company against yield issues.
Intel's referring to Ivy Bridge as a "tick plus", thanks to its expanded graphics core, with the company claiming that just like Sandy Bridge, we're getting a doubling in performance. Just look at Ivy's die, and see how much space the graphics core now occupies.
Ivy Bridge's die, a stark reminder that progress is now focused on GPU, rather than CPU.
Unlike last time, though, don't expect any significant uptick in CPU performance. The reasons are twofold: firstly, this is the first outing of Intel's Tri-Gate transistors, and so, while Intel believes that it will supply plenty of head room for years to come, here it's playing it safe.
Intel's tri-gate, or 3D transistors, should give it a lot more control over clock speed and thermal output in the future.
Secondly, while clock speed isn't everything, and this has been proven time and again, it's just a little portentous that the i7 3770K is launched at the same clock speeds as the previous king of the hill, the 2700K. There is, of course, a reason for this.
It's not about the desktop any more
If you view Intel CPU strategy as a huge ship, Ivy Bridge, now called third-generation Core, is the point where the ship has just finished its rotation, and is preparing to go straight ahead to its new destination.
As the years have passed, we've seen the game of increasing outright performance take a back seat to another concept — performance per Watt. Rather than outright performance, there's been greater interest in how well things can perform within a certain thermal design power (TDP). AMD, Nvidia, Intel; all have changed direction to pursue this goal.
There's an obvious motivation to this: the mobile space. While currently dominated by the likes of ARM, everyone wants to play for that huge cash pile, and Intel is learning as quickly as it can to get there. While the company is still some distance from its goal, along the way, laptop users will reap the benefits of this progress.
It also means that — depressingly for enthusiasts — the desktop CPU is no longer Intel's primary focus. It also doesn't help that AMD is no longer competing in the high-performance space.
While we have no doubt that Haswell will push things along once again, unless you're in the professional segment (video editors, CAD/CAM/3D, scientists, people who like calculating Pi quicker than other people while subjecting the chip to completely unsustainable temperatures), we suspect that even the next architecture won't do a lot for your desktop computing experience. For now, depressingly, we've reached the point of "fast enough".
Gamers, whose market has typically pushed the desktop CPU along, long ago realised that a new graphics card will do significantly more for them than a new CPU. Heck, when gamers opt for mid-tier CPU instead of high end, you know your business model has to change.
Intel knows this, too, so it's no surprise that while we'll be seeing "mainstream" Ivy chips released over the next few months, the performance "halo" chip is being held back until the end of the year for the professional market. In the glory days of desktop computing, this would be unheard of; Extreme Editions and the like would always come first, heralding the dawn of a new performance paradigm. These days, not so much, and it shouldn't be a surprise; the same thing happened with Sandy Bridge-E, last revision. Gamers are no longer willing to pay a huge mark-up for minimal returns, and the market now reflects that.
The upshot is: if you're running a desktop Sandy Bridge-era CPU, you don't need Ivy Bridge. If you're running older, and feeling the performance pinch, grab yourself the i5 3570K CPU and overclock to get yourself the best value on the market. If you're not comfortable with overclocking, but want the best performance, plonk down for the highest clock speed non-K processor that you can afford. A side note — Intel tells us it's no longer shipping K series processors with heatsinks. It's a savvy move, as those who buy K version processors will most likely buy their own aftermarket coolers anyway.
It wouldn't be a new processor launch without a new chipset, and Intel's 7-series boards were available weeks before its processors. Good thing, then, that the socket hadn't changed; Sandy Bridge will happily work in any 7-series board. Ivy should work in prior LGA 1155 boards, as long as a BIOS update is made available.
It also means that people shouldn't have to update their aftermarket coolers. As an interesting aside, if you buy a K-series processor (indicating it's multiplier unlocked) this time around, you won't get a stock heat sink with it; Intel has realised that those who buy these will almost always go aftermarket.
So, what does the new chip bring in combination with the new board? DDR3 supported at 1600MHz instead of 1333MHz, up to four USB 3.0 ports (dropping available USB 2.0 ports from 14 to 10), two SATA 6Gbps ports, PCI Express 3.0 and Thunderbolt capability.