Intel’s Gen 6 Graphics

All 2nd generation Core series processors that fit into an LGA-1155 motherboard will have one of two GPUs integrated on-die: Intel’s HD Graphics 3000 or HD Graphics 2000. Intel’s upcoming Sandy Bridge E for LGA-2011 will not have an on-die GPU. All mobile 2nd generation Core series processors feature HD Graphics 3000.

The 3000 vs. 2000 comparison is pretty simple. The former has 12 cores or EUs as Intel likes to call them, while the latter only has 6. Clock speeds are the same although the higher end parts can turbo up to higher frequencies. Each EU is 128-bits wide, which makes a single EU sound a lot like a single Cayman SP.

Unlike Clarkdale, all versions of HD Graphics on Sandy Bridge support Turbo. Any TDP that is freed up by the CPU running at a lower frequency or having some of its cores shut off can be used by the GPU to turbo up. The default clock speed for both HD 2000 and 3000 on the desktop is 850MHz; however, the GPU can turbo up to 1100MHz in everything but the Core i7-2600/2600K. The top-end Sandy Bridge can run its GPU at up to 1350MHz.

Processor Intel HD Graphics EUs Quick Sync Graphics Clock Graphics Max Turbo
Intel Core i7-2600K 3000 12 Y 850MHz 1350MHz
Intel Core i7-2600 2000 6 Y 850MHz 1350MHz
Intel Core i5-2500K 3000 12 Y 850MHz 1100MHz
Intel Core i5-2500 2000 6 Y 850MHz 1100MHz
Intel Core i5-2400 2000 6 Y 850MHz 1100MHz
Intel Core i5-2300 2000 6 Y 850MHz 1100MHz
Intel Core i3-2120 2000 6 Y 850MHz 1100MHz
Intel Core i3-2100 2000 6 Y 850MHz 1100MHz
Intel Pentium G850 Intel HD Graphics 6 N 850MHz 1100MHz
Intel Pentium G840 Intel HD Graphics 6 N 850MHz 1100MHz
Intel Pentium G620 Intel HD Graphics 6 N 850MHz 1100MHz

Mobile is a bit different. The base GPU clock in all mobile SNB chips is 650MHz but the max turbo is higher at 1300MHz. The LV/ULV parts also have different max clocks, which we cover in the mobile article.

As I mentioned before, all mobile 2nd gen Core processors get the 12 EU version—Intel HD Graphics 3000. The desktop side is a bit more confusing. In desktop, the unlocked K-series SKUs get the 3000 GPU while everything else gets the 2000 GPU. That’s right: the SKUs most likely to be paired with discrete graphics are given the most powerful integrated graphics. Of course those users don’t pay any penalty for the beefier on-die GPU; when not in use the GPU is fully power gated.

Despite the odd perk for the K-series SKUs, Intel’s reasoning behind the GPU split does makes sense. The HD Graphics 2000 GPU is faster than any desktop integrated GPU on the market today, and it’s easy to add discrete graphics to a desktop system if the integrated GPU is insufficient. The 3000 is simply another feature to justify the small price adder for K-series buyers.

On the mobile side going entirely with 3000 is simply because of the quality of integrated or low-end graphics in mobile. You can’t easily add in a discrete card so Intel has to put its best foot forward to appease OEMs like Apple. I suspect the top-to-bottom use of HD Graphics 3000 in mobile is directly responsible for Apple using Sandy Bridge without a discrete GPU in its entry level notebooks in early 2011.

I’ve been careful to mention the use of HD Graphics 2000/3000 in 2nd generation Core series CPUs, as Intel will eventually bring Sandy Bridge down to the Pentium brand with the G800 and G600 series processors. These chips will feature a version of HD Graphics 2000 that Intel will simply call HD Graphics. Performance will be similar to the HD Graphics 2000 GPU, however it won’t feature Quick Sync.

Image Quality and Experience

Perhaps the best way to start this section is with a list. Between Jarred and I, these are the games we’ve tested with Intel’s on-die HD 3000 GPU:

Assassin’s Creed
Batman: Arkham Asylum
Borderlands
Battlefield: Bad Company 2
BioShock 2
Call of Duty: Black Ops
Call of Duty: Modern Warfare 2
Chronicles of Riddick: Dark Athena
Civilization V
Crysis: Warhead
Dawn of War II
DiRT 2
Dragon Age Origins
Elder Scrolls IV: Oblivion
Empire: Total War
Far Cry 2
Fallout 3
Fallout: New Vegas
FEAR 2: Project Origin
HAWX
HAWX 2
Left 4 Dead 2
Mafia II
Mass Effect 2
Metro 2033
STALKER: Call of Pripyat
Starcraft II
World of Warcraft

This is over two dozen titles, both old and new, that for the most part worked on Intel’s integrated graphics. Now for a GPU maker, this is nothing to be proud of, but given Intel’s track record with game compatibility this is a huge step forward.

We did of course run into some issues. Fallout 3 (but not New Vegas) requires a DLL hack to even run on Intel integrated graphics, and we saw some shadow rendering issues in Mafia II, but for the most part the titles—both old and new—worked.


Modern Warfare 2 in High Quality

Now the bad news. Despite huge performance gains and much improved compatibility, even the Intel HD Graphics 3000 requires that you run at fairly low detail settings to get playable frame rates in most of these games. There are a couple of exceptions but for the most part the rule of integrated graphics hasn’t changed: turn everything down before you start playing.


Modern Warfare 2 the way you have to run it on Intel HD Graphics 3000

This reality has been true for more than just Intel integrated graphics however. Even IGPs from AMD and NVIDIA had the same limitations, as well as the lowest end discrete cards on the market. The only advantage those solutions had over Intel in the past was performance.

Realistically we need at least another doubling of graphics performance before we can even begin to talk about playing games smoothly at higher quality settings. Interestingly enough, I’ve heard the performance of Intel’s HD Graphics 3000 is roughly equal to the GPU in the Xbox 360 at this point. It only took six years for Intel to get there. If Intel wants to contribute positively to PC gaming, we need to see continued doubling of processor graphics performance for at least the next couple generations. Unfortunately I’m worried that Ivy Bridge won’t bring another doubling as it only adds 4 EUs to the array.

Quick Sync: The Best Way to Transcode Intel HD Graphics 2000/3000 Performance
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  • usernamehere - Monday, January 03, 2011 - link

    Sure, if you're building a desktop you can find plenty with USB 3.0 support (via NEC). But if you're looking for a laptop, most will still not have it. For the fact that manufacturers don't want to have to pay extra for features, when they usually get features via the chipsets already included. Asus is coming out with a handful of notebooks in 2011 with USB 3.0 (that I know of), but wide-spread adoption will not be here this year. Reply
  • JarredWalton - Monday, January 03, 2011 - link

    Most decent laptops will have USB3. ASUS, Dell, HP, Clevo, and Compal have all used the NEC chip (and probably others as well). Low-end laptops won't get USB3, but then low-end laptops don't get a lot of things. Reply
  • TekDemon - Monday, January 03, 2011 - link

    Even the netbooks usually have USB 3.0 these days and those almost all use intel atom CPUs. The cost to add the controller is negligible for large manufacturers. USB is not going to be the deciding factor for purchases. Reply
  • DanNeely - Monday, January 03, 2011 - link

    Are you sure about that? Newegg lists 99 netbooks on their site. Searching for USB 3 within netbooks returns 0 products. Reply
  • TekDemon - Monday, January 03, 2011 - link

    Your claims are pretty silly seeing as how USB came about in the same way that Light Peak did-Intel invented USB and pushed it to legacy ports like PS/2, and slowly phased out support for the older ones entirely over the years. It makes no sense for them to support USB 3.0, especially without a real market of devices.
    But motherboard manufacturers will support USB 3.0 via add-in chips. I don't see how this anti-competitive at all, why should intel have to support a format it doesn't think makes sense? So far USB 3.0 hasn't really shown speeds close to it's theoretical, and the only devices that really need the higher bandwidth are external drives that are better off being run off E-SATA anyways. There's no real "killer app" for USB 3.0 yet.
    BTW Light Peak will easily support adding power to devices, so it definitely does not need USB in order to provide power. There'll just be two wires running alongside the fiber optics.
    Reply
  • DanNeely - Tuesday, January 04, 2011 - link

    The eSata + USB (power) connector has never gone anywhere, which means that eSata devices need at least 2 cables to work. Flash drives and 2.5" HDs don't need enough power to require an external brick, and 80-90% of eSata speed is still much better than the USB2 bottleneck. With double the amount of power over USB2, USB3 could theoretically be used to run 3.5" drives with a double socket plug freeing them from the wall as well. Reply
  • ilkhan - Monday, January 03, 2011 - link

    I've had my P67A-UD4 for almost 3 weeks now. Lets get the chips out already!

    I'm confused, however. The fist paragraph talks of 4.1Ghz turbo mode and the chart on page 2 lists 3.8Ghz as the max for the 2600K. Is the chart talking about 4-core turbo or what?
    Reply
  • Spike - Monday, January 03, 2011 - link

    Isn't it an i7-2600k? The article title says "i5 2600k"... just curious... Reply
  • Ryan Smith - Monday, January 03, 2011 - link

    Oh dear...

    Fixed. Thanks for that.
    Reply
  • omelet - Monday, January 03, 2011 - link

    > The Sandy Bridge Review: Intel Core i5 2600K, i5 2500K and Core i3 2100 Tested

    Doesn't look fixed over here.
    Reply

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