Intel Core 2 Extreme: 1333MHz PSB and Beyond


Test Setup and Application Benchmarking

Test Setup

Of course, we won't just tell you how fast we managed to overclock the processor. We ran a set of benchmarks on both our ideal 3.33GHz/1333MHz PSB Core 2 Extreme as well as the 3.6GHz max. overclocked X6800 and compared it with the numbers that we've managed to collect so far with the default Core 2 Extreme X6800. The test bed setups used are listed below:-

  • Core 2 Extreme Overclocking Setup
  • Gigabyte GA-965P-DQ6 (Intel P965 chipset)
  • Intel Core 2 Extreme X6800 CPU @ 1333MHz PSB (333x10)
  • Intel Core 2 Extreme X6800 CPU @ 3.6GHz (360x10)
  • 2 x 512MB Corsair DDR2-1066 non-ECC memory modules (CAS 5. 5-5-1)
  • Seagate Barracuda 7200.7 80GB SATA hard disk drive (one single NTFS partition)
  • MSI GeForce 7900 GT 256MB - with NVIDIA Detonator XP 84.21
  • Microsoft Windows XP Professional with Service Pack 2
  • Core 2 Extreme Reference Setup
  • Intel Desktop Board D975XBX (Intel 975X Express chipset)
  • Intel Core 2 Extreme X6800
  • 2 x 512MB Corsair DDR2-800 non-ECC memory modules (CAS 4. 4-4-12)
  • Seagate Barracuda 7200.7 80GB SATA hard disk drive (one single NTFS partition)
  • MSI GeForce 7900 GT 256MB - with NVIDIA Detonator XP 84.21
  • Microsoft Windows XP Professional with Service Pack 2


Results - BAPCo SYSmark 2004

With an increase of PSB to 1333MHz and memory running at DDR2-1000, the 3.33GHz Core 2 Extreme beat the X6800 by around 6%. The small variance in the Office Productivity workload seems to show that SYSmark doesn't scale much with increased processing power and this tallies with the nature of this test suite and past test observations. However, the Internet Content Creation workload saw a much healthier performance boost at higher frequencies, posting results nearly 10% better than the X6800. At 3.6GHz, the performance was further extended to 12.5% from the base reference.