Performance Summary

With all boards featuring the same chipset, CPU and memory, there is little to separate them in terms of performance - the two Intel boards produce almost identical results.

Crysis - Warhead

Bibble 5 Pro - i7 870 CPU @ Stock

WinRAR 3.90 X64 - i7 8760 CPU @ Stock


Power Consumption

Our power consumption testing utilizes the same batch of components under similar circumstances in a bid to monitor variances between idle and CPU load conditions. We install the vendor supplied power saving utilities on each board and enable power saving modes that don't involve any kind of underclocking or CPU core frequency modulation in order to run an apples to apples comparison.

ATX PSU switching losses are absent from our figures because we monitor power consumption directly at the DC rails of the PSU. These figures measure only the CPU, motherboard and memory DC power draw and exclude any other peripherals such as the graphics card, fans and hard drives etc. As such, AC power consumption will be anywhere from 15~40% higher than these figures depending upon the efficiency of your power supply.

Motherboard DC Power Consumption - i7 870 CPU - Idle

Motherboard DC Power Consumption - i7 870 CPU - H.264

Intel’s boards look pretty good in this respect, showing well against the power-hungry, but feature-rich P55 Classified.


DPC Audio Latency

We’re often asked to include a DPC latency screenshot by audio enthusiasts; both the DP55KG and the DP55SB turn in respectable performances:





Overclocking on both boards was ok – we were able to POST and boot into the OS at 200 bclk as well. This was achieved using a low CPU multiplier as we were using the stock Intel heatsink.

Also of note was that this bclk was only achievable on the 2:6 or 2:8 memory ratios – the 2:10 ratio ran into problems and refused to boot around the 175 bclk area which equated to 875 MHz or DDR3-1750. This was despite trying up to 1.35v VTT and loosening timings to 9-9-9-27 and slacking off tRFC and tFAW. Anything higher than 175 BCLK on the 2:10 memory ratio resulted in the board shutting down during stress testing or when loading Windows. On the face of it, we're lead to believe there is some kind of over-current protection in place on the VTT rail - not good.

Intel DP55KG and DP55SB “Kingsberg” & “Sharpsburg“ reviewed... Board Features
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  • Richard Pawley - Wednesday, April 7, 2010 - link


    While I only have the i7 870 and i5 670 to test against at the moment, this is likely to be common to the Clarkdale CPUs. Without testing, we can't say for certain though.

    Yes, the Bluetooth module is next to the SATA ports and it comes with an antenna in the box - a wire with a sticky pad at the end.

  • mrmitch9 - Friday, April 9, 2010 - link

    The PCIe x1 issue is not a bug, it is because of the differences in the PCI controllers in the 2 families of CPUs. If you put in a Lynnfield and boot into the BIOS, it shows x16. If you then shut down and put in a Clarkdale and then boot into the BIOS, it shows x8. Then Save & Exit, reboot into the BIOS again and it is at x16 from then on.

    I think you were booting into Windows with the Lynnfield and it was working fine, then shuting down swapping to a Clarkdale and then booting into Windows without going into the BIOS first. That was when you saw the error.
  • Richard Pawley - Saturday, April 10, 2010 - link


    I'm afraid you're mistaken. This is a bug which happens all the time, i.e repeatable, and not a one-off.

    I had tried what you suggested previously, but I have just tried it again, and it remains at 1x.

    I also tried clearing the CMOS with the CPU removed, installing different nVidia WHQL and Beta drivers and even the Windows 7 WDDM show up in GPU-Z as 1x.

    The only thing I am unable to try is using a different CPU as I only have one Clarkdale CPU.

  • mrmitch9 - Tuesday, April 13, 2010 - link

    Strange. I was using BIOS 4816 with a Clarkdale & Lynnfield with Windows 7 x64 in AHCI. I only saw the issue you were mentioning when I swapped CPUs. I had a EVGA Geforce 9500 512MB PCIe card as well. CPU-Z and GPU-Z always showed the correct speed.
  • LoneWolf15 - Wednesday, April 7, 2010 - link

    It appears both boards have a USB port internally, between the rear port cluster and the MOSFETs. I haven't seen an explanation for this yet --does anyone know what Intel had in mind here?
  • Richard Pawley - Wednesday, April 7, 2010 - link

    Hi. Raja asked Intel about the internal USB a while ago but didn't get a direct response.

    Off the top of my head, I'd suggest you could use it for a permanent Windows ReadyBoost with a USB Pen Drive? Or, IIRC, aren't there some 5.25" bay devices like fan controllers that hook up via USB connectors and normally route out through a PCI slot?

    Sorry I can't give a definite answer - ReadyBoost seems the most logical.

  • strikeback03 - Thursday, April 8, 2010 - link

    There are some card readers and such that go on the front panel but connect through a USB port, not a header. But that location isn't where I would expect for that functionality
  • marraco - Wednesday, April 7, 2010 - link

    My experience with Intel motherboars cannot be worse.

    (Only PCCHIPS do worst)

    I had all kinds of issues:
    - Memories that don't work on Intel mothers, because they are "not registered", but work perfectly on ASUS/Gigabyte. And don't even try to mix different modules...
    - Hard disks that did not worked with Intel, but worked OK on ASUS/Gigabyte.
    - USB ports that did NOT worked at all under windows, but worked correctly under Linux. (D865GBF mobo), and Intel provided no drivers.

    I had those problems frequently, and the only answer that Intel gave me was to download BIOS editors, to fix it myself. What??? 8-0

    - The 4 slots for the triple channel X58, WHY??
    - Non solid state capacitors today??? please.
    - Intel's are too expensive, and do not justify the price at all.
    - Very BAD BIOS design. Too poor.
    - Bad overclockers.
    - Bad driver support. Some drivers are unavailable on Intel web site, because they "are included in windows CD", altought they had bugs only available in same chipsets Asus/Gigabyte, and those bugs blocks installation of windows. So I needed to use gygabyte drivers, with text files hacking.
    - Had you tried to download drivers from Intel??? A trip to hell. Instead of having a list of links to click and download, you need to little-dog pet-jump along 3 or 4 pages for each driver, and the go back 2 or 4 pages to get the next driver download link. ASUS is also annoying, altought far less annoying.
    - Wrong SATA orientation (they fixed it on this article mobos).
    - Wrong spacing between memory sockets and video card.

    I hate when retail vendors try to sell me Intel motherboars, (they like it because are more profitable), by pretending that they are "better", and are completely incapable of answering WHY they "are better".
  • ClagMaster - Wednesday, April 7, 2010 - link

    Sorry you are so bitter about Intel motherboards.

    I have been using Intel Media Series motherboards for nearly 10 years and have been satisfied. For mainstream usage, the offer stable rocks solid performance. They are well designed and well made to last. Intel uses high quality components where they are actually needed. I would note there are polymer capacitors around the power supply, memory and northbridge where loading and heating are the highest. For less demanding locations, alumimum electrolytic capacitors are used. However, my experience is these will be high quality Nichelson or Rubicon capacitors.

    Intel boards are generally finicky with memory. You need memory operating at standard timings, latencies and voltages to work. What works will work very well.

    BIOS support is also very good. Intel will find and correct all defects given time.

    The DP55KG costs too much money for the features and performance it offers. For a little less money and more performance I would purchase the GIGABYTE GA-P55A-UD4P which is an excellent overclocker.
  • PR3ACH3R - Wednesday, April 7, 2010 - link

    I am one of many to appreciate the inclusion of the DPC tests.
    However, To make them mean anything, you must test them under two scenarios:

    1. Heavy Disk IO, especially writing.
    2. Software Video Playback with at least 5.1 Audio.
    3. Heavy Onboard NIC Network Usage

    Building Pro Workstations for the last 13 years,
    These are the 3 most common cases I have always seen the DPC raise it's ugly head more then any other scenario.

    Almost any motherboard will show the numbers you posted when idle,
    (In fact your results are not that great for an idle board),
    but the DPC problem can arise under these scenarios even when idle there appears to be no sign of it.

    Thank you.

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