AMD Trinity: Battery Life Also Improved

With all of the changes going into Trinity, one thing that hasn’t changed since Llano is the process technology. Trinity is once again coming on a 32nm process from GlobalFoundries. If we were talking about Intel, Trinity would represent a “Tock” on the roadmap—a new architecture on an existing process. We’ve looked at CPU and GPU performance, and this is a part that’s pretty much universally faster than its predecessor. Given the lengthier pipeline and Bulldozer-derived architecture, I admit that I was concerned Trinity might actually be a step back for battery life; it appears that my fears were unfounded, largely due to the improvements in Piledriver. As usual, we tested with all laptops set to 100 nits brightness in our idle, Internet, and H.264 playback tests. I also ran some additional tests which we’ll discuss in a moment. First, here are the standard battery life results:

Battery Life—Idle

Battery Life—Internet

Battery Life—H.264 Playback

Battery Life Normalized—Idle

Battery Life Normalized—Internet

Battery Life Normalized—H.264

With a similar capacity battery to the original Llano laptop, and the same size 14” panel, Trinity comes out of the gates and posts two clear wins: idle battery life and Internet battery life are both up substantially relative to Llano. In fact, looking at the normalized charts, the only laptops that can consistently beat Trinity are found in Sandy Bridge ultrabooks—we won’t even bother discussing Atom or Brazos netbooks, as they’re competing in a completely different performance bracket. In something of a surprise, H.264 battery life doesn’t see the same benefit unfortunately, and it’s the one discipline where Llano still holds on to a slight lead over Trinity. Sandy Bridge meanwhile has always done very well in H.264 battery tests, and we see that with the Vostro V131 posting a normalized score that’s 30% better than Trinity and Llano. Of course, on the other end of the spectrum we have Ivy Bridge; we’ve only looked at one Ivy Bridge laptop so far, but if the pattern holds than Ivy Bridge will generally be a moderate step back in battery life relative to Sandy Bridge, giving AMD an even larger lead in this area.

We also performed a few other tests that we won’t present in graph form. One set of tests we alluded to earlier: the charts show Trinity with a Samsung 830 SSD, but we also ran tests with an Intel 520 SSD. Idle battery life dropped to 476 minutes (an 8% decrease), Internet battery life checked in at 371 minutes (down 8% again), and H.264 battery life stayed nearly the same at 217 minutes (down less than 3%). If battery life is one of your primary concerns, remember: all SSDs are not created equal!

Another test that we ran is simulated gaming; we looped the four graphics tests in 3DMark06 at 1366x768 until the battery ran out. We’ve run this same test on quite a few other laptops, and Llano initially looked to be far and away the best solution. Later, we discovered that when we tested Llano we were letting the GPU run in power saving mode—basically half the performance you’d get compared to being plugged in. We retested and measured 98 minutes, so the extra graphics performance comes with a heavy cost. We only tested Trinity (and Ivy Bridge and Sandy Bridge) using higher performance graphics settings, and this is one more area where it scores worse than Llano: Trinity managed just 77 minutes. That’s about the same as Ivy Bridge and Sandy Bridge (79 and 73 minutes, respectively), so if you’re after better gaming performance while running off the mains, you might need to keep looking.

Before getting too carried away with the above results, you still need to consider how important battery life is for your usage model. Some people travel a lot and like to go all day without plugging in; others will go from place to place and plug in whenever they’re not on the go. If you fall in the latter category, battery life isn’t usually a problem with any decent laptop, while those looking for all-day computing will definitely want as much mobility as possible. Ultimately, battery life is a factor of battery capacity as well as power optimizations done by the OEMs. We’ve seen battery life improve by as much as 50% when comparing two otherwise similar notebooks, but at least AMD’s reference platform for Trinity delivers a great starting point.

Temperatures and Acoustics

One other item we wanted to quickly touch on is system temperatures. We typically use HWMonitor and check temperatures of laptops under idle and load conditions. We did this with Trinity as well, but unfortunately the current version of HWMonitor doesn’t give us a lot of information. The only temperatures it reports are from the SSD and the HD 7660G graphics—there’s nothing about CPU core temperatures. That means we can’t provide much detail, other than to say that load temperature on the GPU topped out at 71C during extended testing, while the idle temperature was 39C. As usual, temperatures and noise levels go hand in hand, and the low 71C maximum GPU temperature matches up nicely with noise levels that never got above 37dB. It’s not the quietest laptop we’ve ever tested, and surface temperatures can get a little warm, but overall Trinity looks to be a good balance of performance and power requirements, which means quiet laptops are definitely possible.

AMD’s Heterogeneous Computing with Trinity Conclusion: What Makes a Trinity?
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  • Spunjji - Wednesday, May 16, 2012 - link

    Ha! :D Reply
  • medi01 - Friday, May 18, 2012 - link

    "Moderately better graphics" - referring to a 2 times (3D Vantage) faster GPU sounds very biased.
    On top of it, Intel's "HD" has rendering quality problems:
    http://media.bestofmicro.com/Trinity-A10-4600M-Rev...
    Reply
  • medi01 - Friday, May 18, 2012 - link

    PS
    Things that are important for most users, and I think many users in this thread agree:

    1) Screen quality
    2) Battery life

    On top of it, user is much likely to play games, than do video/audio encoding _in_which_he_would_care_about_performance_.
    Reply
  • medi01 - Friday, May 18, 2012 - link

    "Trinity is 10-20% faster than Llano on CPU"
    Uhm, I beg to differ (from tom's review).

    Handbreak: +23%
    iTunes: +37%
    Abby Fine Reader: +24%
    WinRar: +38%

    http://www.tomshardware.com/reviews/a10-4600m-trin...
    Reply
  • potatochobit - Tuesday, May 15, 2012 - link

    Hold on, just to be clear all you tested was the IGP?
    this laptop is not running dual graphics correct?
    because I think that would make a large difference
    Reply
  • JarredWalton - Tuesday, May 15, 2012 - link

    To test dual graphics you need to have a laptop with dual graphics, and the prototype does not have that. You can't test what doesn't exist. And frankly, after the fiasco that was dual graphics on Llano (at least on the prototype system), AMD made the right decision to skip that element this time. Besides, dual graphics just puts more of a load on the CPU -- the weakest link in Trinity. Reply
  • e36Jeff - Tuesday, May 15, 2012 - link

    Is there any way to play with the bios to lower clock speeds/disable cores to simulate what the low power parts(specifically the A10-4655M and A6-4455M) will behave like? I know the power levels will be wrong as this isnt a LV/ULV part, but I (and im betting quite a few other people) would be very interested in seeing what kind of performance they can get out of the parts aimed at the ultrathins. Reply
  • JarredWalton - Tuesday, May 15, 2012 - link

    No, the BIOS on this laptop is very basic and has no options for adjusting anything really useful. Reply
  • Beenthere - Tuesday, May 15, 2012 - link

    I replied to your knee-jerk reaction back a few comments Jarred.

    I hope tomorrow is a better day than today for U. ;)
    Reply
  • bji - Tuesday, May 15, 2012 - link

    You are not important enough to demand responses like you are doing. Trying to redirect Jarred's attention to that other pointless thread? Lame and off-topic in this thread. Reply

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