It's that time of the year. Once again, Intel's roadmaps have been leaked and we get to see what Intel has in store for us in 2012. I find the first bits of concrete info like frequencies to be the most interesting as they tell us what's really coming and allow us to analyze what to expect. So, let's see what the desktop Ivy Bridge lineup holds inside.

In case you need to refresh your memory about Ivy Bridge, you can consult our Ivy Bridge Architecture Exposed article (and check other content under our Ivy Bridge tag). However, we'll give a quick overview of the main points. Ivy Bridge is a die shrink of Sandy Bridge, from 32nm to 22nm. In Intel language, this is a "Tick", although for the graphics side, this is actually a "Tock" (i.e. new architecture). Ivy Bridge will also use Tri-Gate transistors and will be socket compatible with Sandy Bridge, so you won't need a new motherboard if you have a SNB based system already—just a BIOS update.

There will be new 7-Series chipsets, though, with support for USB 3.0 for example. The first details of Ivy Bridge leaked in May, and the latest roadmaps suggest an April 2012 release. Without further ado, let's take a look at what standard voltage Ivy Bridge CPUs are planned.

Specifications of Standard Voltage Ivy Bridge CPUs
SKU i7-3770K i7-3770 i5-3570K i5-3570 i5-3550 i5-3470 i5-3450 i5-3330
Core/Thread Count 4/8 4/8 4/4 4/4 4/4 4/4 4/4 4/4
Frequency (GHz) 3.5 3.4 3.4 3.4 3.3 3.2 3.1 3.0
Max SC Turbo (GHz) 3.9 3.9 3.8 3.8 3.7 3.6 3.5 3.2
L3 Cache 8MB 8MB 6MB 6MB 6MB 6MB 6MB 6MB
Graphics HD 4000 HD 4000 HD 4000 HD 2500 HD 2500 HD 2500 HD 2500 HD 2500
Graphics Frequency (MHz) 650 650 650 650 650 650 650 650
Max Graphics Turbo (MHz) 1150 1150 1150 1150 1150 1100 1100 1050
Memory Support 1600MHz and 1333MHz DDR3
TDP 77W 77W 77W 77W 77W 77W 77W 77W
VT-d   X   X X X    
TXT   X   X X X    
SIPP   X   X X X    
vPro   X   X X X    

I think there is at least one typo. It doesn't make sense that i7-3770 has base frequency of 3.4GHz, whereas i7-3770K has 3.5GHz, yet they share the same Turbo of 3.9GHz. Turbo Boost works by increasing the CPU multiplier by a set amount of bins, and all the other CPUs have a maximum of five bins. We'd expect the i7-3770 to have a base frequency of 3.5GHz to follow the pattern of the other CPUs, not to mention it shares a name with the i7-3770K (the K indicating an unlocked multiplier). It could be right, and it's only 100MHz regardless, but it was a bit conspicuous. Anyway, that's it for typo-hunting; let's look at the big picture.

As a whole, the planned Ivy Bridge lineup looks a lot like the current Sandy Bridge lineup. There are a total of eight CPUs, which is actually two more than what the initial SNB i5 and i7 lineup had. Two of these CPUs have an unlocked CPU multiplier (K-Series), and two are i7s and have Hyper-Threading enabled, giving them a total of 8 threads. The frequencies are also fairly similar. Overall, IVB seems to provide a 100MHz boost over SNB, although the new i7-2700K reaches the same frequencies as i7-3770(K). It appears that all desktop i7 SKUs will use the better graphics. At first I thought this was a typo but after looking at the low power specifications (below) it started to make sense.

Not everything is the same, though. The trick of Ivy Bridge is its power usage. The TDP is down from 95W to 77W, which is a 19% decline. For years, Intel and others have been pushing for higher and higher performance with roughly static power use, but that has changed of late. Consumers have noticed that you can buy a relatively low performance ARM-based tablet and it can still run the tasks that most people do, but you get a device that is silent and has long battery life. For desktops, power efficiency isn't as big a deal, but it plays a huge role in laptops. I would say the reduction in TDP is the main reason why the specifications (not performance) are so similar to Sandy Bridge. If Intel had kept the 90W TDP, higher frequencies would have been likely and we might have even seen a hex-core part without a loss in frequency, but we'll save that discussion for another day.

There's one notable omission right now: the roadmap includes only i5 and i7 CPUs with no mention of i3. However, i3 is not gone—there will be an i3-3200 series. It's dual-core with Hyper-Threading and no Turbo Boost, very similar to the current i3-2100 series. We can't say for certain why its specifications are not listed, but it's likely that Intel will release the quad-core parts first and the dual-core parts will follow a month or two later, just like what we saw with SNB. It's also possible that there will be fewer i3 models than in the SNB lineup because of the two extra i5 models, but that's speculation.

PCI Express 3.0 is also missing from the info we have seen, but there's nothing on the PCIe version. The 7-series chipsets will have eight PCIe 2.0 lanes, that's known, but every slide concerning the PCIe lanes of the CPU refers to them as PCI Express, nothing else. The reason for the lack of version information might be the same as in SNB-E: there are no public PCIe 3.0 devices, so Intel can't guarantee 3.0 speeds. On the other hand, Intel doesn't want to list PCIe as 2.0 in IVB slides because we will most likely have PCIe 3.0 cards by the release of IVB platform. Anyway, IVB should provide us with 16 PCIe 3.0 lanes, which is quite evident if you look at the "Ivy Bridge Ready" motherboards.

The Low Power Ivy Bridge

Specifications of Low Voltage Ivy Bridge CPUs
SKU i7-3770S i7-3770T i5-3570S i5-3570T i5-3550S i5-3475S i5-3470S i5-3470T i5-3450S i5-3330S
Core/Thread Count 4/8 4/8 4/4 4/4 4/4 4/4 4/4 2/4 4/4 4/4
Frequency (GHz) 3.1 2.5 3.1 2.3 3.0 2.9 2.9 2.9 2.8 2.7
Max SC Turbo (GHz) 3.9 3.7 3.8 3.3 3.7 3.6 3.6 3.6 3.5 3.2
L3 Cache 8MB 8MB 6MB 6MB 6MB 6MB 6MB 3MB 6MB 6MB
Graphics HD 4000 HD 4000 HD 2500 HD 2500 HD 2500 HD 4000 HD 2500 HD 2500 HD 2500 HD 2500
Graphics Frequency (MHz) 650 650 650 650 650 650 650 650 650 650
Max Graphics Turbo (MHz) 1150 1150 1150 1150 1150 1100 1100 1100 1100 1050
Memory Support 1600MHz and 1333MHz DDR3
TDP 65W 45W 65W 45W 65W 65W 65W 35W 65W 65W
VT-d X X X X X X X X    
TXT X X X X X X X X    
SIPP X X X X X X X X    
vPro X X X X X X X X    

The low power family has grown by four SKUs, from six (SNB) to ten (IVB), and we are still potentially missing some i3 models. One of the additions is the i7-3770T, the first T-series i7 CPU. It could prove to be a very interesting chip for low power desktops because it packs in four cores and Hyper-Threading and sports a very aggressive Turbo Boost range, all in a 45W TDP. That actually sounds a lot like what we've seen from the mobile SNB parts. The other significant addition is the i5-3475S; the specs are the same as the i5-3470S but the GPU is the faster HD 4000 instead of HD 2500. All the low power SNB CPUs used HD 2000 graphics, so the use of better graphics on a low-power desktop part is a new move. The remaining low-power models fill in the gaps with no real surprises.

Looking at the big picture, the standard voltage chips concentrated on reducing the TDP, so that definitely puts more pressure on the low-power chips. We'd even go so far as saying that the need for the S-series CPUs is questionable, as they're only rated 12W (16%) lower than the standad chips. The clock speeds are quite high in the S-series chips, sure, but recommending the S-series over regular chips will be hard, especially if Intel continues to charge a significant price premium for their low power models. We would have liked a further reduction in TDP on the low-power parts, e.g. make the S-series 55W and T-series 40W/30W at the expense of a couple hundred MHz. That way the lineup would have more differentiation, but in the end the roadmap is what it is.

The Graphics

Graphics is one area where Intel has put in a lot of extra work in Ivy Bridge. While the CPU core count remains the same, the IGP gets a boost. The EU count is up from 12 to 16 in the high-end version (HD 4000); HD 2500 has an unknown number of EUs, but 8 EUs seems the most likely. The new IGP also features support for DirectX 11, bringing it up to feature parity with AMD and NVIDIA parts (though we'll still take a "wait and see" stance on the drivers). In our Ivy Bridge Architecture article, Anand mentioned that IVB should offer nearly twice the GFLOPS per EU that SNB offers. Intel has been claiming improvements of up to 60% in graphics performance, which sounds plausible given the clock speeds and EU counts. We will take a deeper look into the performance in a separate article soon.


Overall, there aren't any big surprises in the lineup. The mobile lineup should be a lot more interesting because Ivy Bridge has clearly been designed with power efficiency in mind, and that is what matters in laptops. Unfortunately, the data we have right now is only for desktops, so we'll have to wait leaked mobile roadmaps. We'll leave off further investigation and analysis of the Ivy Bridge roadmap for now, but we'll return with a couple more articles looking at other areas in the next week or so.

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  • gramboh - Monday, December 5, 2011 - link

    Same here. I`ll be upgrading from a Q6700 @ 3.3GHz (formerly E6600 @ 3.2), P965 mobo and 4GB DDR2-800 which I built in April 2007. It has seen 3 video cards (8800 GTS 640MB -> GTX 280 -> GTX 560 Ti) and is still going strong. BF3 runs pretty nicely at 1920x1200 on high detail/2X AA/16X AF, but the load times are brutal, I really need an SSD.

    I'm happy with what Ivy Bridge is offering. 77W TDP on the 3770K means 4.5GHz should be a breeze, maybe even closer to 5GHz, not that it's needed for my use (desktop and gaming).

    Somewhat disappointed the Z77 chipset is only bringing 2 SATA6 ports, although I doubt I will ever have more than 2 SSDs installed anyway. Integrated gigabit ethernet is nice (Intel I assume).
  • frozentundra123456 - Saturday, December 3, 2011 - link

    It is about what we expected, but this is kind of a disappointing line up to me. I would have liked to see more of a decrease in power consumption at least, if they are not going to increase clockspeed. Going from 95 to 77 watts on the desktop parts is no big deal to me. If you have a system with a high end graphics card or even SLI, saving less than 20 watts is a minimal decrease. And again, increasing IGP performance on the desktop isnt a big deal either. Maybe for OEM systems, the increase in IGP performance will impress, but these chips are so fast that it seems a waste not to have a discrete card in a desktop.

    Maybe this lineup for the mobile sector will be more of an improvement since power usage and IGP preformance mean more there. I also wonder if all the mobile parts will get the HD4000 like all SB mobile chips got the "high end" IGP. I also wonder how the HD4000 will compete vs mobile Llano.
  • ltcommanderdata - Saturday, December 3, 2011 - link

    You mention the launch timeframe for desktop Ivy Bridge is April 2012. Has there been any indication for mobile parts? Are they expected around the same time or will they come afterword, perhaps when dual core parts are available?
  • vhx - Saturday, December 3, 2011 - link

    Not that special of a release, as evident by keeping the i7 and i5 lineup names. Still no 6 core processors, more focus on integrated GPU's. Good direction for laptops and maybe HTPC's, boring for everything else including desktops.
  • biassj - Saturday, December 3, 2011 - link

    So reading around, in order to use Intel VT-d the motherboard must support it? I can still run VMware without Intel VT-d?

    Note: coming from AMD Phenom II here
  • Kjella - Monday, December 5, 2011 - link

    Sure, it's optional. It's not even the most important virtualization feature, it's only important for heavy disk I/O. If most of your VM work depends on the CPU you'll probably not even notice the difference.
  • Denithor - Saturday, December 3, 2011 - link

    First, 'omision' is spelled 'omission.'

    Second, will the new more powerful GPU accelerate Quick Sync significantly beyond what it already does on SB? I'm curious, DVDFab now supports QS on SB and I have yet to see this reviewed anywhere. Would love to see a legit review here of the technology!
  • Hrel - Saturday, December 3, 2011 - link

    Correct me if I'm wrong, but doesn't "enabling hyper threading" not make producing the chip any more expensive AT ALL?!


    My laptop has a quad core with hyperthreading and I'll be damned if my dekstop's cpu has less threads. With that said I'm not spending 300+ dollars on a desktop CPU. Right about 200 is what I spend on desktop CPU's. GIVE ME 8 THREADS INTEL! WTF! i've been waiting for a 200 dollar quad core with hyper threading from Intel since the Conroe days when they released the Q6600. I'm getting seriously pissed.

    Or am I just mistaken and it makes the chip significanlty more expensive thereby justifying the 100 dollar price tag? Oh wait i3's have HT but i5's DON'T!!!!! GaHHHHHH!
  • Iketh - Saturday, December 3, 2011 - link

    it's all marketing...
  • MonkeyPaw - Saturday, December 3, 2011 - link

    It's the intel business model. There's what the market wants, what intel can do, and what they actually provide. Rarely do all 3 match. Intel sits on good ideas in case they need to break them out for the sake of competition.

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