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.

GeForce GTX 750 Series Voltages
Ref GTX 750 Ti Boost Voltage Zotac GTX 750 Ti Boost Voltage Zotac GTX 750 Boost Voltage
1.168v 1.137v 1.187v

For those of you keeping track of voltages, you’ll find that the voltages for GM107 as used on the GTX 750 series is not significantly different from the voltages used on GK107. Since we’re looking at a chip that’s built on the same 28nm process as GK107, the voltages needed to drive it to hit the desired frequencies have not changed.

GeForce GTX 750 Series Average Clockspeeds
  Ref GTX 750 Ti Zotac GTX 750 Ti Zotac GTX 750
Max Boost Clock
Metro: LL
Battlefield 4
Crysis 3
Crysis: Warhead
TW: Rome 2

Looking at average clockspeeds, we can see that our cards are essentially free to run at their maximum boost bins, well above their base clockspeed or even their official boost clockspeed. Because these cards operate at such a low TDP cooling is rendered a non-factor in our testbed setup, with all of these cards easily staying in the 60C or lower range, well below the 80C thermal throttle point that GPU Boost 2.0 uses.

As such they are limited only by TDP, which as we can see does make itself felt, but is not a meaningful limitation. Both GTX 750 Ti cards become TDP limited at times while gaming, but only for a refresh period or two, pulling the averages down just slightly. The Zotac GTX 750 on the other hand has no such problem (the power savings of losing an SMX), so it stays at 1162MHz throughout the entire run.

Idle Power Consumption

Load Power Consumption - Crysis 3

Load Power Consumption - FurMark

Idle GPU Temperature

Load GPU Temperature - Crysis 3

Load GPU Temperature - FurMark

Idle Noise Levels

Load Noise Levels - Crysis 3

Load Noise Levels - FurMark

Compute Overclocking: When Headroom Exceeds Clockspeed Limits
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  • Mondozai - Wednesday, February 19, 2014 - link

    USA in recession? You are either ignorant or use your own home-cooked economics for "special" people like yourself.

    As for consoles. Sure you can get low-end cards for cheaper sums a PC but people buy consoles for their games, simplicity and the fact that they are increasingly multimedia machines for a low cost.

    These factors will not change with these new cards.
  • Yojimbo - Wednesday, February 19, 2014 - link

    I thought I remember reading a headline a while back that said Sony or Microsoft or both were not planning on selling their hardware for a loss this time...
  • madmilk - Tuesday, February 18, 2014 - link

    The launch PS3 cost over $800 to manufacture, and Sony lost something like $3 billion in the first two years from hardware sales even though the PS3 wasn't even selling that well. To a lesser extent, Microsoft had the same problem with the Xbox 360. Of course Sony and Microsoft would go for cheaper, mid-range off-the-shelf components this time around. No one wants to make the same mistake twice.
  • Antronman - Tuesday, February 18, 2014 - link

    Wow. What do they think, everybody here is an OC pro who has/had world records and has a monster closed loop browsing/gaming/work setup? I don't give a damn about lower power consumption if it means I have to OC the balls off the card!
  • moozoo - Tuesday, February 18, 2014 - link

    Please include at least one fp64 benchmark in the compute section.
    It is great that you found out and reported the fp64 ratio.
    Its a pity there isn't at least one low power low profile card with good DP Gflops (at least enough to beat the CPU and form a compelling argument to switch API's)
    At work we only get small form factor PCs, and asking for anything that looks different ends in politics.
  • Ryan Smith - Thursday, February 20, 2014 - link

    For the moment FP64 data is available via Bench. This being a mainstream consumer card, it's purposely not built for high FP64 performance; FP64 is there for compatibility purposes rather than being able to do much in the way of useful work.

    This is a purposeful market segmentation move that won't be going anywhere. So cards such as the 750 Ti will always be very slow at FP64.
  • jrs77 - Tuesday, February 18, 2014 - link

    Now we need a manufacturer to release a GTX750 with single-slot cooler.
  • koolanceGamer - Tuesday, February 18, 2014 - link

    While all of this "low power" stuff is a little boring to me (not that anything is really pushing the high end card) I hope that in the not too distant future even the video cards like the 780/Titan will be able to be powered by the PCI alone.

    I would love to do a gaming build with a PCI based SSD and no cables coming off the video cards, it would be so clean!
  • EdgeOfDetroit - Tuesday, February 18, 2014 - link

    Well I want laser light circuit cables. So much faster than copper and they would look so clean, you wouldn't even know there was a cable there unless you put your hand into the laser beams to see the pretty lights...

    ... Ahh crap another BSOD, these laser cables suck!
  • Devo2007 - Wednesday, February 19, 2014 - link

    Starting to wonder what a good card to replace a GTX 560 Ti would be (that's still relatively affordable). Would I have to step up to something like the R9 270 or GTX 760 cards to make things worthwhile? The power savings of the GTX 750 Ti aren't really a big factor as I'm currently using a 650w PSU, but I also don't want to spend a ton of money.

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