Sibling Rivalry - Intel E6750 and Q6600 Overclocking Duel

Overclocking II – Quad-Core Q6600 at 3.20 GHz

We continue to push for higher clock speeds. Next, the processor hit the 3.20 GHz mark, albeit at a much higher core voltage than its dual-core counterpart. To reach this frequency, we had to increase the voltage by a full 0.100 V to enable it to complete the Prime95 test without issue on a front-side bus of 356 MHz (1424 QDR).

E6750 Q6600 Overclocking

Along with the clock speed, the memory frequency increases to DDR2-854 (427 MHz), while still running at a latency of CL 4.0-4-4-12. That such a dramatically increased core voltage is needed to achieve this speed is due to the Q6600’s design, which uses two dual-core chips. Here, the probability that one of the two cores has lower overclocking potential is twice as high, even though both of the dual-core parts inside use the G0 stepping. Also, two dual-cores dissipate twice as much heat, which in return results in a higher CPU temperature, leading to a higher risk of instability.

E6750 Q6600 Overclocking

E6750 Q6600 Overclocking

Core 2 Quad Q6600 @3.20 GHz
CPU Frequency3.20 GHz (+33.3 %)
FSB356 MHz (1424 QDR)
Core Voltage1,4125 Volt
Memory Multiplier2.40x
Memory FrequencyDDR2-854 (427 MHz)
Memory LatencyCL 4.0-4-4-12

  1. E6750 or Q6600 – Which is the better choice?
  2. The Processors – E6750 or Q6600?
  3. Processor – G0 Stepping is a must
  4. Motherboard – Gigabyte or MSI with P35 chipset
  5. Highlights of the MSI Board – Affordable, Heatpipe on Board
  6. Highlights of the Gigabyte Board – More Features
  7. GEIL Memory – An Overclocking Natural
  8. Cooler - Zalman's CNPS9700LED is Ideal
  9. Looking at the Bottom Line – CPU, Cooler, Board, and RAM
  10. Overclocking I – Dual-Core E6750 at 3.00 GHz
  11. Overclocking II – Dual-Core E6750 at 3.30 GHz
  12. Overclocking III – Dual-Core E6750 at 3.40 GHz
  13. Overclocking IV – Dual-Core E6750 at 3.50 GHz
  14. Overclocking V – Dual-Core E6750 at 3.60 GHz
  15. Overclocking I – Quad-Core Q6600 at 3.00 GHz
  16. Overclocking II – Quad-Core Q6600 at 3.20 GHz
  17. Overclocking III – Quad-Core Q6600 at 3.30 GHz
  18. Overview of Core Voltages
  19. Power Consumption and Energy Cost – Less is more with Dual-Core
  20. Overclocking Yields 25 Percent Performance Increase
  21. Performance Winner – Q6600 Provides 5.3% More Performance
  22. Test Setup
  23. Software Configuration
  24. Benchmarks and Settings
  25. 3D-Games - UT2004, Prey
  26. 3D-Games - Quake 4, Warhammer
  27. 3D-Games - Supreme Commander, Serious Sam 2
  28. 3D-Rendering - Cinema 4D, 3D-Studio Max
  29. Applications - AVG, WinRAR
  30. Applications - Photoshop, PDF
  31. Applications - Deep Fritz
  32. Audio Encoding - iTunes, Lame
  33. Synthetic - Sandra CPU
  34. Synthetic - Sandra Memory
  35. Synthetic - Sandra Multimedia
  36. Synthetic - PC-Mark
  37. Synthetic - 3D-Mark
  38. Video Encoding - Xvid, Pinnacle Studio
  39. Video Encoding - Premiere, Mainconcept
  40. Video Encoding - HDTV, DivX
  41. Video Encoding - CloneDVD
  42. Conclusion - Intel Quad-Core and MSI P35 Neo2 get our Nod
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  • spuddyt
    so what you just said, is the newer stuff is better
  • dobby
    i dont know why they take 10 pages to show what can be said in 1 page + a few graphs
  • technogiant
    On top of that Crysis is meant to be very cpu dependant and prefers 4 cores - it's the way things are going
  • ilovemrdoe
    Hmm, if they'd have gone for a different motherboard they could have gotten the q6600 to 3.6 on air.
  • crisUK
    Dunno if you have a duff chip or mobo. I have a Q6600 and exactly the same cooler and I can do 3.41 GHz at stock voltage on a Gigabyte 965P-DS3P.
  • crisUK
    "Its stock clock speed is 2.4 GHz, which it operates at using a comparatively low core voltage of 1.3125 Volts – the lowest core voltage available for this chip"

    Wrong my Q6600 is 1.26V although it runs slightly higher in practice.
  • anqe
    I guess this shows how OC'ing can vary depending on luck. Even hand picking the best S numbers is no guarantee. A bit of luck (unless you have deep pockets) can be key.

    Fortunately for myself, my Q6600 is 1.28v core, and hits 3.6GHz with only slight bump.

    Indeed electron migration is a significant issue at high Vcore but realistically most of us overclocking are probably running 6-12 month cycles on our hardware (at least from my experience) and the cost of killing a mid range part every year against taking a top end part is still more cost effective.

    That's given only one CPU in the past 15 that I've OC'd have failed (possibly luck?) on me and that was due to a faulty voltage regulator on my motherboard :(
  • rune1980
    Very nice review/test. Highly informative. I was gonna buy a 6850 or a quad core but now im just gonna grab the low cost msi board and a 6750 and spent my cash elsewhere.
  • rune1980
    question, you end up recommending the MSI motherboard, but the test system states that you used the gigabyte for the test. Will i be able to get the same clocking abilities with the MSI?