Power, Temperature, & Noise

As always, last but not least is our look at power, temperature, and noise. Next to price and performance of course, these are some of the most important aspects of a GPU, due in large part to the impact of noise. All things considered, a loud card is undesirable unless there’s a sufficiently good reason – or sufficiently good performance – to ignore the noise.

Radeon R9 270 Series Voltages
AMD R7 270 Boost Voltage Sapphire R7 265 Boost Voltage Asus R7 260 Boost Voltage
1.188v 1.175v 1.225v

Neither the R7 260 nor the R7 265 are remarkable as far as voltages are concerned. Both of these are right in the range of common voltages for lower clocked Pitcairn and Bonaire products respectively. Though this does reinforce the fact that R7 265 won’t see any significant power savings compared to R9 270.

Radeon R9 270 Series Average Clockspeeds (Reported)
  Sapphire R7 265 Asus R7 260
Boost Clock 925MHz 1000MHz
Metro: LL
925MHz
1000MHz
CoH2
925MHz
1000MHz
Bioshock
925MHz
1000MHz
Battlefield 4
925MHz
1000MHz
Crysis 3
925MHz
1000MHz
Crysis: Warhead
925MHz
1000MHz
TW: Rome 2
925MHz
1000MHz
Hitman
925MHz
1000MHz
GRID 2
925MHz
1000MHz

Looking briefly at average clockspeeds, despite the fact that these cards implement different power control mechanisms – PowerTune Boost 1.0 and PowerTune Boost 2.0 respectively – the end results are the same. Neither card has difficulty maintaining its top clockspeed for their entire runs, this owing in large part due to the fact that they’re not under any significant thermal load that would require pulling back.

Idle Power Consumption

Starting as always with idle power consumption, we can see that all of our low-end cards are tightly clustered. With idle power consumption as good as it is for both AMD and NVIDIA, further improvements are relatively marginal by desktop standards and are essentially drowned out by the large PSU in our GPU testbed.

Load Power Consumption - Crysis 3

Power consumption under Crysis 3 closely mirrors relative performance, at least for our current-generation 28nm cards. The R7 260 for its part draws 196W at the wall, 15W-23W more than the R7 250X and GTX 650 cards it clearly outclasses, and 5W more than the GTX 650 Ti that it still manages to consistently beat. More interesting is that it’s drawing 26W at the wall less than the R7 260X, showcasing that AMD’s power numbers for these cards were in fact almost spot on, especially after accounting for the change in CPU power consumption.

Otherwise for the R7 265, we can see that power consumption slots in above the 7850 and R7 260X, and below the R9 270 by 9W, the kind of very limited change we were expecting. At the same time we can see just how close the R7 265 and GTX 660 are – separated by just 4W – which goes hand-in-hand with their similar performance.

Load Power Consumption - FurMark

Under FurMark we do see some shifts in relative power consumption, though not relative rankings. At 189W the R7 260 is virtually tied with the less powerful 250X, underscoring Bonaire’s greater efficiency and improved power throttling mechanisms, while the 235W R7 265 once again slots in between the R7 260X and R9 270 by several watts in each direction.

Idle GPU Temperature

Moving on to temperatures, our idle temperatures are unremarkable. At 29C for the R7 265 and 31C for the R7 260 both cards do well enough, but they can’t touch the near room temperature operating temperatures of some of the NVIDIA 650 cards.

Load GPU Temperature - Crysis 3

With both of today’s cards being low power open air cooled dual fan cards, there’s little concern for temperatures. Both cards are easily below 70C, with the more powerful R7 265 easily dropping to 55C due to its larger cooler. The R7 260 hits 66C despite its relatively low power, though Asus has clearly been targeting a balance between noise and temperatures as opposed to just maximum cooling in their more recent designs.

Load GPU Temperature - FurMark

Of our two cards, the R7 265 gets the worse of FurMark relatively speaking, thanks in part to its coarser power throttling mechanisms. Regardless even when presented with a maximum load, both cards do well for themselves here, having no trouble staying below 70C.

Idle Noise Levels

Last but not least we have our noise testing. Both the R7 260 and R7 265 do very well for themselves at idle, taking the #1 and #2 spots respectively. Both of these cards are functionally near-silent at idle, and this proves that both Asus and Sapphire did their homework by being able to hit these noise levels with a dual fan configuration, something not every vendor has had a ton of luck with over the years.

Load Noise Levels - Crysis 3

Once again both of today’s cards do very well here. Though the R7 260 is admittedly among the lowest powered cards here, and hence has the easiest time, it nevertheless takes the top spot at 38dB. This being quieter than both the GTX 650 and GTX 650 Ti, the two cards it’s closest to in power consumption and heat generation.

Meanwhile at 40.4dB is the R7 265, where Sapphire has managed to stay cool and quiet despite the nearly 150W the card can pull. At this point it’s still marginally quieter than the slower 260X and over 6dB quieter than the performance-competitive GTX 660 (though it should be noted that the GTX 660 is a blower).

Load Noise Levels - FurMark

FurMark once again changes the picture, but only slightly slow. Even under this extreme workload Asus’s R7 260 comes away smiling, topping out at 38.5dB, 2.5dB less than the GTX 650 Ti. Otherwise we have the Sapphire R7 265 at 43.6dB, which gives up some of its edge from earlier but not much, easily besting the GTX 660 and R7 260X, but falling a bit short of the GTX 650 Ti.

Taken in altogether, both Asus and Sapphire have done good jobs with their R7 260 and R7 265 respectively. As we’ve seen both are able to hit low noise levels even for their relative classes, all the while easily maintaining low operating temperatures.

Otherwise from a power perspective as neither card is based on a new GPU, there are admittedly no real surprises to be had. Power roughly scales with performance, with the R7 265 as a 3rd tier part seeing a lesser benefit, and thereby falling a bit behind the efficiency curve as set by the higher tier Pitcairn parts.

 

Compute Final Words
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  • edzieba - Thursday, February 13, 2014 - link

    Are Anandtech considering a switch from average framerates to latency/frame-rating (either with Fraps or FCAT)? Reply
  • Ryan Smith - Thursday, February 13, 2014 - link

    Frame pacing is an additional tool we run from time to time as is appropriate, but it's not something we'll use for every review. Frame pacing is largely influenced by drivers and hardware, neither of which shift much on a review-by-review basis. So it's primarily reserved for multi-GPU articles and new architectures as appropriate.

    And especially in the case of single-GPU setups, there's not much to look at. None of these cards has trouble delivering frames at a reasonably smooth pace.

    http://www.anandtech.com/bench/GPU14/873
    Reply
  • HisDivineOrder - Thursday, February 13, 2014 - link

    Yeah, that's what you guys said before the whole frame latency thing broke, too. It's a shame you aren't doing proper monitoring to catch it the first time and are setting up a scenario where it flies under the radar yet again the next time AMD decides to get lax on making drivers.

    Then again, this article is in red, right? AMD News is right next to it. Hell, even the comment button is red. I'm guessing the AMD overlords wouldn't like it very much if you were constantly harping on something they dropped the ball on so completely that their competitor had to slowly explain to them how to even see the problem and then how to fix it.
    Reply
  • gdansk - Thursday, February 13, 2014 - link

    It's a shame. I'm with your argument. AnandTech should try to include as many indicative benchmarks as possible. At times FCAT is indicative.

    But sadly, calling someone a shill with only coincidence is no better than libel. You have made an unsubstantiated allegation. It is decidedly unscientific to insult one's professional integrity with mere coincidental insinuations and no evidence. Why would you do that?
    Reply
  • Death666Angel - Thursday, February 13, 2014 - link

    So they are in the pocket of nVidia, Intel, AMD, Android AND Apple? Wow, those companies must really be idiots then. Reply
  • Gigaplex - Thursday, February 13, 2014 - link

    I don't know where you got all the other brands from, but technically yes Ars is in the pockets of AMD. See http://www.anandtech.com/portal/amd - this is sponsored by AMD. Reply
  • Gigaplex - Thursday, February 13, 2014 - link

    Bah, AnandTech, not Ars Reply
  • Death666Angel - Thursday, February 13, 2014 - link

    I know _that_. But he is clearly insinuating that their opinions are bought by AMD. And since products from all those companies I listed (who are all competitors) regularly get recommendations, and Anandtech gets then accused of being paid shills, I find it funny that anyone thinks that is true. If they are bought by AMD as suggested, how come they don't come up with a benchmark track that makes AMD CPUs shine? Or how come they slammed the R9 so much for the noise? It's all pretty silly. Reply
  • nader_21007 - Friday, February 14, 2014 - link

    It seems that it hurts you how come this site is not biased and doesn't admire every thing Nvidia, like other sites? well you can go read Tom's Hardware, WCCFtech and every other hardware site, and be sure they will satisfy your needs. Reply
  • zodiacsoulmate - Friday, February 14, 2014 - link

    Yea, it's like trying to compare samsung to apple again, sure you can say there is no way to compare which one is better hardware considered, the user experience is just not on pair... Reply

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