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AMD A10-7850K And A8-7600: Kaveri Gives Us A Taste Of HSA

Results: Media Encoding

The benchmarks on this page employ workloads that we imagine are high on AMD’s list of tasks to accelerate through OpenCL, and ultimately to optimize for its HSA features. In fact, there’s already a beta version of HandBrake with OpenCL-based optimizations that offload cropping and down-scaling to the GPU.

At least in TotalCode Studio, however, encoding happens on x86 cores. This application leverage’s Rovi’s popular MainConcept codecs, which run well on Intel’s Core i5-4670K. The dual-core Core i3 and dual-module A10 and A8 APUs all turn in very similar results. Only the 45 W A8-6500T is completely blown away.

Switch over to the -7600 with a 45 W ceiling and you can take that 144-second finish time down to 98 seconds. We've already pointed this out several times, but AMD says it optimized Kaveri for that 45 W ceiling. In this case, those improvements cut 31% from the test's completion time.

Although we’re not using the OpenCL-accelerated beta of HandBrake, the stable version in our suite does explicitly leverage Kaveri’s support for FMA3/4, LZCNT, and BMI1. Then again, so does Richland’s Piledriver architecture.

Either way, A10-7850K manages a win against -6800K (for that matter, A8-7600 does too).

Dialed down to 45 W, the -7600 finishes in 213 seconds. Compared to the other 45 W part in our chart, AMD’s A8-6500T, that’s a phenomenal improvement. It’s just particularly sexy in a desktop environment.

Our LAME audio conversion test is single-threaded. It’ll allow each of these CPUs to spin up to their maximum Turbo Boost or Core frequency (unlike the per-cycle comparison we ran earlier, which sought to compare architectural efficiency at a fixed 4 GHz).

Intel’s Haswell design maintains its advantage. Richland, as it appears on the A10-6800K, hits higher clock rates and therefore is faster than Kaveri.

Again, curious as to how the 45 W version of A8-7600 would size up with its peak clock rate constrained to 3.3 GHz, I adjusted down the configurable TDP in ASRock’s firmware. The outcome was a finish time of 139 seconds—an impressive improvement over the A8-6500T standing in as our 45 W Richland-based APU.

The same story applies to iTunes, which is also single-threaded.

  • vipervoid1
    Somethings with Diagram u provided at page 9 ~ Core i5 4760k @@Please fix that ~
    Reply
  • Someone Somewhere
    Yeah, almost all the diagrams refer to the 4760K.

    Given that AM3+ looks like it's done, it would have been nice to see a 6-core chip. Still, one of these may end up in my next laptop.
    Reply
  • cangelini
    Will get the charts fixed shortly--thanks for the catch!
    Reply
  • spp85
    A10-7850k is slower than A10-6800K ?? WTF. Its all hype than actual performance to the table. Even on OpenCL GPU accelerated apps doesn't have any advantage with A10-7850k over i5 or sometimes i3 CPUs. Hopeless is what I feel about AMD CPUs.
    Reply
  • Someone Somewhere
    12454254 said:
    A10-7850k is slower than A10-6800K ?? WTF.

    I got the opposite impression. Which graph are you looking at?
    Reply
  • Jaroslav Jandek
    Thank you for the article (especially the power consumption measurements), Chris. It is definitely an improvement over Richland but kind of boring (disappointingly expectable).

    I really like where AMD is going (HSA, GCN and TrueAudio).Too bad the manufacturing process of GlobalFoundries just can't match Intel's.

    Also, it would be interesting to see the new Bay Trail Pentium or Celeron CPUs (whichever is closer in performance) in the Efficiency graphs.
    Reply
  • Someone Somewhere
    I'm fairly sure that this is on TSMC's 28nm node. GlobalFoundries can't do that yet; this is on the same process used for AMD GPUs currently.
    Reply
  • Jaroslav Jandek
    12454280 said:
    I'm fairly sure that this is on TSMC's 28nm node. GlobalFoundries can't do that yet; this is on the same process used for AMD GPUs currently.
    28nm SHP from GlobalFoundries. AMD bought over $1 billion worth of wafers from them in december...

    I guess you have been reading the articles from a year ago about AMD still using TSMC despite promises of GlobalFoundries' new 28nm SHP process.
    Reply
  • jacobian
    I don't really believe into the whole HSA smoke-screen. By the time HSA-enabled apps take off, you will be ready to upgrade from your CPU again. The one terrible truth that stands out right now is that at current prices, the flagship Kaveri A10 doesn't make any sense whatsoever. Kaveri A8? Maybe. Richland A10-6790K? Perhaps. But the Kaveri A10 at $180 is a just a joke, specially after all that hype.
    Reply
  • Someone Somewhere
    CPUs are usually released at ridiculous prices, and come down over a month or two.
    Reply