Making Lemonade: Overclocking Your Locked AMD Processor

Benchmark Results: Memory Tweaking

Memory Tweaking

All testing thus far was performed after setting 8-8-8-24 2T timings in the BIOS. In these charts, we take the Tweaked PC settings of 3,744 MHz core speed, 2,592 MHz NB speed, and 2,016 MHz HT link speed, and test with the four different stable memory settings mentioned earlier.

There is almost no difference seen in the CPU Arithmetic test. If anything, tighter memory timings are more important than memory frequency.

Here we see the memory bandwidth given up by decreasing the memory ratio. At the 2.66 ratio, only the slightest increase in bandwidth differentiates Auto, CAS 9, our CAS 8, and the tightened CAS 7 timings.

Our two manually-set timings lead the way, but overall, little difference is seen in the 3DMark Vantage CPU score.

The scaling in World in Conflict is almost too perfect, as tightening timings results in a single fps gain in both minimum and average fps. The one noticeable difference is the drop in minimum framerates at the slower memory frequency.

Tightening memory timings on this overclocked system has no impact on 3ds Max 2009 rendering time.

  • stray_gator
    What's the point of using a high-end mobo to overclock a mainstream/value cpu?
  • sohei
    it's about how to squeeze all performance from an locked cpu .
    this is a pro' article (head shot)
  • nzprogamer
    im a big amd fans, good stuff here, look forward to go back to amd
  • amdfangirl
    Good article! Too bad I killed my AMD CPU :P
  • brisingamen
    great article, should be more like it,
    and a few more gaming benches wouldnt hurt either guys!
    speaking of headshots yes unreal tournament is probably the most important game to exemplify the value of overclocking and added framerates due to "headshots" and shtuff.

    keep up the good work!
  • Onus
    stray_gatorWhat's the point of using a high-end mobo to overclock a mainstream/value cpu?Fair question; no one would likely do this IRL, but I think the point here was to see how high the locked CPU could go, so they used a premium mobo.
    Paul, now that we know what this specific CPU can do, would it be useful to now put it on a more typical mainstream mobo and see what one might get from the same chip under more typical conditions?
    The point would be to answer the following: if my budget just grew by $25, does it make more sense to buy a BE CPU or to get a more premium mobo?
  • haplo602
    stray_gatorWhat's the point of using a high-end mobo to overclock a mainstream/value cpu?
    because value mobos vary in stability much more than premium mobos. this article was just about the CPU limit, not the mobo limit.
  • Tom's should do a shoot-out between an i7 920 and a 965BE that's had the multiplier taken down to 13x(2.6ghz), then both OCed to the max on the northbridge alone. I'm sure that would close the gap atleast somewhat, but I'm interested to see exactly how much. Maybe they could screw around with the HyperTransport multiplier as well, it might turn out that AMD has been shooting itself in the foot with the unlocked multiplier, when more performance would be had if they were forcing people to use the northbridge.
  • Shadow703793
    Good write up; but PLEASE do NOT recommend OCing via Windows. Most pro's here will tell you that same thing. BIOS > Windows for OCing.
  • Shadow703793
    Also how about putting this under WCing or DIce/LN2? :D