The Test

As was the case with Lynnfield, the current Sandy Bridge CPUs Intel is sampling are slightly different than what will be sold. The Core i5 2400 runs at 3.1GHz, has four cores, 6MB of L3 cache but no Hyper Threading. In order to help Intel’s partners test HT functionality however, the i5 2400s being sampled right now have Hyper Threading enabled. For the purposes of our test I’ve run with HT both enabled (to give you an idea of higher end SB parts) and disabled (to give you an idea of i5 2400 performance).

The other major difference between what’s out today and what’s coming in Q1 is turbo. Early Sandy Bridge samples, ours included, do not have turbo enabled. The CPU simply runs at 3.1GHz all the time, regardless of workload. The final retail 2400 will be able to run at up to 3.4GHz.

In other words, what we show here should be indicative of final performance, but it's probably slower than what will ship in Q1.

Click to Enlarge

On the GPU side, the part I’m testing appears to be the single-core GPU configuration (6 EUs). Intel hasn’t released any info as to what parts will get the dual-core/12 EUs GPU configurations, although it may make sense for Intel to use the 12 EU parts in notebooks given the importance of integrated graphics to the mobile market. Update: The part we're looking at may actually have been a lower clocked 12 EU part, we're still waiting for additional confirmation.

Our test platform was a H67 based motherboard running with 4GB of DDR3-1333, the same memory we use in our Lynnfield testbeds.

I’m comparing to four other CPUs. The Core i7 980X for a high end comparison, the Core i7 880 for a near clock-for-clock comparison (albeit with HT enabled), the Core i5 760 for a potential price comparison and the Phenom II X6 1090T. The latter should be AMD’s fastest offering (if not close to it) when Sandy Bridge ships. Update: Note the Core i5 650 is actually the predecessor to the Core i5 2400, however I didn't feel a dual core vs. quad core comparison was too fair. The i5 760 will actually go head to head with the higher clocked i5 2500 when it launches in Q1.

Motherboard: ASUS P7H57DV- EVO (Intel H57)
Intel DP55KG (Intel P55)
Intel DX58SO (Intel X58)
Intel DX48BT2 (Intel X48)
Gigabyte GA-MA790FX-UD5P (AMD 790FX)
Chipset Drivers: Intel (Intel)
AMD Catalyst 8.12
Hard Disk: Intel X25-M SSD (80GB)
Memory: Corsair DDR3-1333 4 x 1GB (7-7-7-20)
Corsair DDR3-1333 2 x 2GB (7-7-7-20)
Video Card: eVGA GeForce GTX 280 (Vista 64)
ATI Radeon HD 5870 (Windows 7)
Video Drivers: ATI Catalyst 9.12 (Windows 7)
NVIDIA ForceWare 180.43 (Vista64)
NVIDIA ForceWare 178.24 (Vista32)
Desktop Resolution: 1920 x 1200
OS: Windows Vista Ultimate 32-bit (for SYSMark)
Windows Vista Ultimate 64-bit
Windows 7 x64
Overclocking Controversy Sandy Bridge Integrated Graphics Performance
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  • foundchild1 - Friday, August 27, 2010 - link

    "For example, today the fastest LGA-1156 processor is the Core i7 880. When Sandy Bridge launches early next year, the fastest LGA-1155 processor will be the Core i7 2600."

    Shouldn't the second one also read LGA-1156? Are they changing the pin count/socket for this 'tock'?
  • foundchild1 - Friday, August 27, 2010 - link

    Well, that's me being an idiot and not reading the whole article first... New socket indeed.
  • medi01 - Saturday, August 28, 2010 - link

    So intel has locked multtipliers because of some other evil companies, eh? To protect the consumers, right?

    What a shame... :(
  • jfelano - Sunday, August 29, 2010 - link

    Did you even read the article???? Yes its s1155.
  • wazzap123 - Thursday, November 18, 2010 - link

    The story of how caches are going to work in the 8+ core world is getting exciting. I like the overview at the daily circuit that summarizes how Niagara 3, Tilera Gx-100, and BlueGene/P processors weigh in on the issue too
  • dendysutrisna - Friday, August 12, 2011 - link

    The Apple iMac 21.5inch is a computer machine which uses the power of Intel Core i5-2400. Look at these page: Processors like that, thanks to its strength, could draw the attention of everyone, even computer vendors at the level Apple also has without a doubt to hook them.
  • Grooveriding - Friday, August 27, 2010 - link

    It's hard to wade through all this data so quickly. That said, as far as overclocking, the new 2011 socket will be the successor to 1366 ?

    I hope with all these new overclocking controls there will still be that mainstay $300 CPU that can overclock to some extreme performance. Meaning a successor to the i7 920/930 that can deliver the amazing performance those can overclocked.

    I hope this is not the death knell for such a CPU and Intel is expecting us to fork over $1000 for that performance level.
  • BSMonitor - Friday, August 27, 2010 - link

    Good question, but judging by the road map, the Extreme and Performance segments are still Gulftown Processors. I think the 1366 stays for Gulftown.
  • Casper42 - Saturday, August 28, 2010 - link

    On the 2P Server side of things, I have been told there will be a Westmere v2 coming in January 2011.
    This is probably the same family that will produce the i7 990 and the other 1366 chips on the chart that don't exist yet. The Xeon 5600 and 970/980 are damn near identical aside from QPI Links.

    Being those are being released in Jan, I wouldn't expect to see a socket 2011 desktop part until basically a year from now.

    They will once again be a close relative to the 2P Server family. The socket for the 2P Servers will be Socket R and will be Quad Channel memory as well as supposedly having PCIe 3.0.
  • bitzao - Friday, August 27, 2010 - link

    Yeah but.... will it run Starcraft II ? (on medium)

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