790GX and SB750 explored and reviewed

Motherboards/AMD AM2+ by massman @ 2008-10-02

The 790GX chipset has been released a while ago and motherboards equiped with this chipset and the new southbridge chipset SB750 are now widely available in the local hardware shops. Madshrimps has had its sample, sent by AMD, on the testbench a while now and today we have a look at the new technology, including a better IGP and supposedly better overclocking.

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Test setup and methodology

Test setup

Madshrimps' AMD Test Setup

  • AMD Phenom X4 9850
  • Cooling
  • Noctua NH-U12P
  • Mainboard
  • MSI K9A2 Platinum v1
  • Foxconn A7DA-S
  • Memory 2 * 1GB TeamGroup PC6400
  • Sparkle Calibre 8600GT 512MB (drivers FW 169.21)
  • Tagan 480W PSU
  • Western Digital 320Gb SATA HDD
  • Windows XP SP3

  • Methodology

    The following benchmarks were used:

  • SiSoft Sandra 2007: CPU and Memory benchmark
  • Lavalys Everest: Memory latency
  • SuperPi 1M
  • Wprime 32M
  • Wprime 1024M

  • PCMark05
  • TechArp X264 HD benchmark
  • Cinebench 10

  • 3DMark2001SE
  • 3DMark06
  • Prey
  • Crysis

    We ran both setups at 2,5 and 3,0GHz to compare. Detailed information here:

    Madshrimps (c)

  • Phenom X4 9850 - 200x12,5=2500MHz - 2000MHz (NB) - 533MHz 4-6-6-22 - Unganged
  • Phenom X4 9850 - 250x12=3000MHz - 2500MHz (NB) - 500MHz 4-4-4-10 - Unganged

    Note that, just like in our first Phenom review, we still have problems with applying the correct memory timings in combination with the 533MHz divider. It seems to be random as sometimes when we set 4-4-4-10, we get 4-6-6-22 or 5-6-6-18 or some other combination. This divider was added to give AMD users benefit of extra memory bandwidth, but to be honest, stay clear of this divider if you're tuning your system.
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