Power, Temperature, and Noise

Last but not least as always is our look at the power consumption, temperatures, and acoustics of the GTX 580. NVIDIA’s performance improvements were half of the GTX 580 story, and this is the other half.

Starting quickly with voltage, as we only have one card we can’t draw too much from what we know, but there are still some important nuggets. NVIDIA is still using multiple VIDs, so your mileage may vary. What’s clear from the start though is that NVIDIA’s operating voltages compared to the GTX 480 are higher for both idle and load. This is the biggest hint that leakage has been seriously dealt with, as low voltages are a common step to combat leakage. Even with these higher voltages running on a chip similar to GF100, overall power usage is still going to be lower. And on that note, while the voltages have changed the idle clocks have not; idle remains at 50.6MHz for the core.

GeForce GTX 480/580 Voltages
Ref 480 Load Ref 480 Idle Ref 580 Load Ref 580 Idle
0.959v 0.875v 1.037v 0.962v

Beginning with idle power, we’re seeing our second biggest sign that NVIDIA has been tweaking things specifically to combat leakage. Idle power consumption has dropped by 17W on our test system even though the idle clocks are the same and the idle voltage higher. NVIDIA doesn’t provide an idle power specification, but based on neighboring cards idle power consumption can’t be far off from 30-35W. Amusingly it still ends up being more than the 6870 CF however, thanks to the combination of AMD’s smaller GPUs and ULPS power saving mode for the slave GPU.

Looking at Crysis, we begin to see the full advantage of NVIDIA’s optimizations and where a single GPU is more advantageous over multiple GPUs. Compared to the GTX 480 NVIDIA’s power consumption is down 10% (never mind the 15% performance improvement), and power consumption comes in under all similar multi-GPU configurations. Interestingly the 5970 still draws less power here, a reminder that  we’re still looking at cards near the peak of the PCIe specifications.

As for FurMark, due to NVIDIA’s power throttling we’ve had to get a bit creative. FurMark is throttled to the point where the GTX 580 registers 360W, thanks to a roughly 40% reduction in performance under FurMark. As a result for the GTX 580 we’ve swapped out FurMark for another program that generates a comparable load, Program X. At this point we’re going to decline to name the program, as should NVIDIA throttle it we may be hard pressed to determine if and when this happened.

In any case, under FurMark & X we can see that once again NVIDIA’s power consumption has dropped versus the GTX 480, this time by 27W or around 6%. NVIDIA’s worst case scenario has notably improved, and in the process the GTX 580 is back under the Radeon HD 5970 in terms of power consumption. Thus it goes without saying that while NVIDIA has definitely improved power consumption, the GTX 580 is still a large, power hungry GPU.

With NVIDIA’s improvements in cooling and in idle power consumption, there’s not a result more dramatic than idle GPU temperatures. The GTX 580 isn’t just cooler, it’s cool period. 37C is one of the best results out of any of our midrange and high-end GPUs, and is a massive departure from the GTX 480 which was at least warm all the time. As we’ll see however, this kind of an idle temperature does come with a small price.

The story under load is much the same as idle: compared to the GTX 480 the GTX 580’s temperatures have dramatically dropped. At 79C it’s in the middle of the pack, beating a number of single and multi GPU setups, and really only losing to mainstream-class GPUs and the 6870 CF. While we’ve always worried about the GTX 480 at its load temperatures, the GTX 580 leaves us with no such concerns.

Meanwhile under FurMark and Program X, the gap has closed, though the GTX 580 remains in the middle of the pack. 87C is certainly toasty, but it’s still well below the thermal threshold and below the point where we’d be worried about it. Interestingly however, the GTX 580 is actually just a bit closer to its thermal threshold than the GTX 480 is; NVIDIA rated the 480 for 105C, while the 580 is rated for 97C. We’d like to say this vindicates our concerns about the GTX 480’s temperatures, but it’s more likely that this is a result of the transistors NVIDIA is using.

It’s also worth noting that NVIDIA seems to have done away with the delayed fan ramp-up found on the GTX 480. The fan ramping on the GTX 580 is as near as we can tell much more traditional, with the fan immediately ramping up with higher temperatures. For the purposes of our tests, this keeps the temperatures from spiking as badly.

Remember where we said there was a small price to pay for such low idle temperatures? This is it. At 44.4dB, the 580 is ever so slightly (and we do mean slightly) louder than the GTX 480; it also ends up being a bit louder than the 5970 or 6870CF. 44.4 is not by any means loud, but if you want a card that’s whisper silent at idle, the GTX 580 isn’t going to be able to deliver.

And last but not least is load noise. Between their improvements to power consumption and to cooling, NVIDIA put a lot of effort in to the amount of noise the GTX 580 generates. Where the GTX 480 set new records for a single GPU card, the GTX 580 is quieter than the GTX 285, the GTX 470, and even the Radeon HD 5870. In fact it’s only a dB off of the 5850, a card under most circumstances we’d call the epitome of balance between performance and noise. Graphs alone cannot demonstrate just how much of a difference there is between the GTX 480 and GTX 580 – the GTX 580 is not whisper quiet, but at no point in our testing did it ever get “loud”. It’s a truly remarkable difference; albeit one that comes at the price of pointing out just how lousy the GTX 480 was.

Often the mark of a good card is a balance between power, temperature, and noise, and NVIDIA seems to have finally found their mark. As the GTX 580 is a high end card the power consumption is still high, but it’s no longer the abnormality that was the GTX 480. Meanwhile GPU temperatures have left our self-proclaimed danger zone, and yet at the same time the GTX 580 has become a much quieter card under load than the GTX 480. If you had asked us in what NVIDIA needed to work on with the GTX 480, we would have said noise, temperature, and power consumption in that order; the GTX 580 delivers on just what we would have wanted.

Compute and Tessellation Final Thoughts
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  • Ryan Smith - Tuesday, November 09, 2010 - link

    In this house we obey the laws of thermodynamics!

    Thanks for the heads up, Don.
    Reply
  • Troll Trolling - Tuesday, November 09, 2010 - link

    You guys made my day. Reply
  • samspqr - Tuesday, November 09, 2010 - link

    more important, where it says:

    "Both the Radeon HD 5970 and Radeon HD 6870 CF are worthy competitors to the GTX 580 – they’re faster and in the case of the 6870 CF largely comparable in terms of power/temperature/noise."

    it should say:

    "Both the Radeon HD 5970 and Radeon HD 6870 CF come out on top of the GTX 580 – they’re faster in nearly all benchmarks, and in both cases largely comparable in terms of price, power and temperature; 6870CF is also comparable in terms of noise, while 5970 comes out significantly louder."
    Reply
  • DominionSeraph - Tuesday, November 09, 2010 - link

    No, it should say, "Both 6850 CF and GTX460 SLI blow everything else out of the water given that they're practically giving away the highly overclockable 6850's for ~$185, 1GB GTX 460's for ~$180 AR, and 768MB GTX 460's for $145 AR." Reply
  • DreamerX5521 - Tuesday, November 09, 2010 - link

    by looking at the test results, I guess 6870CF is a better choice than a single 580 in term of performance/watt, price (about the same), temperature, noise, etc.. Reply
  • Kim Leo - Tuesday, November 09, 2010 - link

    I noticed that as well, a little surprising I did expect a bit more considering all the hype, but then again it's built on the Fermi.
    I'm not sure what's up with the pricing? Do they think that there will be a market for GTX480 when Cayman comes and with the GF110 out?
    Reply
  • Sihastru - Tuesday, November 09, 2010 - link

    If you can live with the sub-par minimum framerates that plagues so many games with CF setups. Reply
  • JarredWalton - Tuesday, November 09, 2010 - link

    Amen. I'm a 5850 CF user (and 4870X2 before that), and I can tell you I'd much rather have a single GPU and forget about profiles and other issues. But then, 30" LCDs need more than a single GPU in most games. Reply
  • B3an - Wednesday, November 10, 2010 - link

    30" monitors dont need anything more than a high-end single GPU for most games. 99.9% of PC games are playable maxed out plus AA at 2560 res with just one of my 5870's in use, of with my previous 480. Theres only a handful of games that need dual GPU's to be playable at this res. Mainly because most games are console ports these days.

    And the OP is wrong, 6870 CF is not any better than the 580 with temperature or noise. 580 being better under load with noise, better with temps at idle, but only very slightly hotter under load.
    Reply
  • knutjb - Tuesday, November 09, 2010 - link

    I agree guys it should be a 485 not a 580.

    The 6870 is a sore spot on an otherwise solid refinement. Curious to see its SLI performance. $559 on Newegg this am.
    Reply

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