Overclocking Intel’s HD Graphics - It Works...Very Well

The coolest part of my job is being able to work with some ridiculously smart people. One such person gave me the idea to try overclocking the Intel HD graphics core on Clarkdale a few weeks ago. I didn’t get time to do it with the Core i5 661, but today is a different day.

Clarkdale offers three different GPU clocks depending on the model:

Processor Intel HD Graphics Clock
Intel Core i5-670 733MHz
Intel Core i5-661 900MHz
Intel Core i5-660 733MHz
Intel Core i5-650 733MHz
Intel Core i3-540 733MHz
Intel Core i3-530 733MHz
Intel Pentium G9650 533MHz

 

The Core i5 661 runs it at the highest speed - 900MHz. The rest of the Core i5 and i3 processors pick 733MHz. And the Pentium G6950 has a 533MHz graphics clock.

Remember that the Intel HD Graphics die is physically separate from the CPU die on Clarkdale. It’s a separate 45nm package and I’m guessing it’s not all that difficult to make. If AMD can reliably ship GPUs with hundreds of shader processors, Intel can probably make a chip with 12 without much complaining.

So the theory is that these graphics cores are easily overclockable. I fired up our testbed and adjusted the GPU clock. It’s a single BIOS option and without any changes to voltage or cooling I managed to get our Core i3 530’s GPU running at 1200MHz. That’s a 64% overclock!

I could push the core as high as 1400MHz and still get into Windows, but the system stopped being able to render any 3D games at that point.

I benchmarked World of Warcraft with the Core i3 running at three different GPU clocks to show the potential for improvement:

CPU (Graphics Clock) World of Warcraft
Intel Core i5 661 (900MHz gfx) 14.8 fps
Intel Core i3 530 (733MHz gfx) 12.5 fpx
Intel Core i3 530 (900MHz gfx) 14.2 fps
Intel Core i3 530 (1200MHz gfx) 19.0 fps

 

A 64% overclock resulted in a 52% increase in performance. If Intel wanted to, it could easily make its on-package GPU a lot faster than it is today. I wonder if this is what we’ll see with Sandy Bridge and graphics turbo on the desktop.

Integrated Graphics - Slower than AMD, Still Perfect for an HTPC Overclocking the i3 - 4GHz with the Stock Cooler
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  • kwrzesien - Friday, January 22, 2010 - link

    When is that Gigabyte board going to be available? I've already bought two 530's from Microcenter for $99 each and one GA-H55M-U2H board from Newegg to go into Antec P180's. I'm really hoping to get the USB3 ports and triple-power USB that is on the -USB3 model. It's been announced since mid-December and is only Gigabytes website but absolutely no signs of it in e-tail yet.
  • Rajinder Gill - Friday, January 22, 2010 - link

    Hi,

    We'll ask about this first thing Monday morning and get back to you with an answer if possible.


    regards
    Raja
  • kwrzesien - Monday, January 25, 2010 - link

    Raja,

    Thanks for looking into this! Still no sign on NewEgg as of this morning. I need to order by tomorrow to get my friend's build out, maybe I should just look for USB3.0 PCIe cards...

    Thanks,
    Kirk
  • Rajinder Gill - Tuesday, January 26, 2010 - link

    Hi.

    I'll paste the response I got back from GB this morning:

    We have 4 H57/H55 models on the NA marketing currently. The model name and selling price of Newegg are listed below:



    "H57M-USB3: $10+ up than H55M-USB3, wait for posting from Newegg.



    H55M-USB3: $109.99, http://www.newegg.com/Product/Product.aspx?Item=N8...">http://www.newegg.com/Product/Product.a...&cm_...



    H55M-UD2H: $104.99, http://www.newegg.com/Product/Product.aspx?Item=N8...">http://www.newegg.com/Product/Product.a...&cm_...



    H55M-S2H: $89.99, http://www.newegg.com/Product/Product.aspx?Item=N8...">http://www.newegg.com/Product/Product.a...&cm_...

    "


    Hope this helps!

    Raja
  • kwrzesien - Tuesday, January 26, 2010 - link

    Raja,

    THANKS! Really I just couldn't wait so I ordered another UD2H and a $40 USB3 card, the second build can get upgraded with USB3 later. Looks like the H57M-USB3 would be a better price overall but then you do loose two USB2 ports from the back panel - I hope they include a 2-port slot adapter on the USB3 model because they sure don't in the UD2H model, which already has 2 internal USB2 headers.
  • Shadowmaster625 - Friday, January 22, 2010 - link

    An AMD motherboard, with a northbridge and IGP is cheaper than an H55 motherboard that has no northbridge. I want to know why, and that should be the #1 question when it comes to i3, and yet you didnt even address this issue.
  • Anand Lal Shimpi - Friday, January 22, 2010 - link

    I mentioned this in an earlier comment. It's the same reason that AMD motherboard prices didn't go down when we moved from the K7 to K8 - chipset prices remained the same.

    The H5x chipsets, despite most of the logic being shifted onto the CPU package, are no cheaper than the previous generation G4x chipsets. Both AMD and Intel have made it very clear that as they integrate more functions onto the CPU, they aren't going to lower chipset prices. Instead, profit margins go up.

    It's a fairly new platform so I'd expect average prices to drop as production ramps up, but that's the main reason the boards aren't any cheaper. I believe you can buy H55 boards for less than $90 on Newegg now, and then there's this ECS board that sells for under $80 (under $70 with MIR) - http://www.newegg.com/Product/Product.aspx?Item=N8...">http://www.newegg.com/Product/Product.a...cm_re=In...

    Take care,
    Anand
  • tno - Friday, January 22, 2010 - link

    I have a Q9300@3/X48/4890 based system. I'm a pretty average user, and the hardest work my CPU does is the occasional HD encode, and the systems hardest daily toll is gaming on one screen with an HD video on the other. I have not seen any slow down or deficiencies in my system, and don't feel limited in the slightest. I haven't played the newest, most stressful games around, but on the whole, I don't see a big case for making the jump to Nehalem or Clarkdale. Indeed, I feel comfortable sitting on my rig till Sandy Bridge.

    So, am I nuts? Am I missing some hugely compelling reason to make the jump? Is it the efficiency? Or is this tock really not as big a deal as the last tock (Penryn)?

    tno
  • Taft12 - Friday, January 22, 2010 - link

    If you're a "pretty average" user, why did you buy a "pretty high end" motherboard and video card if you don't even play new games?? Shoulda gone for something half the price and upgrade twice as often :)
  • tno - Friday, January 22, 2010 - link

    My wife was on a bunch of away rotations and so I was home alone and bored. That lead to a series of purchases that were in tune with the lifestyle of a guy with time and cash to spend. Then my wife came home and suddenly the time and the cash went away. Don't get me wrong, I love my wife, but it was a fun time and had she been away much longer I'd be cruising with some wicked water cooled i7 rig.

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