Build Your Own: Single-Slot GeForce GTX 750 Ti

Performance, Temperature, And Noise

Our thermal readings come from a long loop of Metro Last Light, which is meant to stress the card with a demanding load and represent other 3D scenarios. This is a particularly taxing title, and it's possible that temperatures would even be lower in less intensive games.

Model
Idle
Gaming Load
GeForce GTX 750 Ti Reference
28 °C
65 °C
GeForce GTX 750 Ti Passive29 °C
80 °C
GeForce GTX 750 Ti Low Profile
29 °C
80 °C

As with our passively-cooled GeForce GTX 750 Ti, this single-slot version with its small heat sink and fan is helped by Nvidia's 80 °C temperature target. Whenever the GPU hits 80 degrees, it gets throttled to make sure it doesn't exceed that value.

And here's where theory hits the real world, and the impact of throttling makes itself apparent. The chart with the GPU Boost clock rates will give us a better understanding of how frequencies correspond with frame rates later on.

Real-World Gaming Performance

So what do those numbers mean in reality? Even though Nvidia's GPU Boost clock rate falls by about 6.5%, measured frame rates only drop by 3.6%. In an average gamer's day, that's a negligible difference. A title that was previously playing back at 30 FPS falls close to 29; that's going to be hard to notice with your eyes.

As a result of Nvidia's thermal protection mechanism, though, you can really use whatever cooling solution you want. Just look at the reference GeForce GTX 780, 780 Ti, and Titan cards. They're able to run almost silently thanks to a capable design and GPU Boost's fast response.

Noise

First, we'll check noise under a couple of different workloads. Measurements are taken using a studio-quality microphone with the same calibration we use for our PC audio testing. The mic is positioned vertically in the center of the graphics card, 50 cm away.

Model
Idle
Gaming Load (Open Test System)
GeForce GTX 750 Ti Reference
31.5 dB(A)
34.1 dB(A)
GeForce GTX 750 Ti Passive
N/A
N/A
GeForce GTX 750 Ti Low Profile32.1 dB(A)
38.5 dB(A)

At idle and under load, the single-slot cooler is louder than Nvidia's little reference-class orb-style cooler. However, the acoustic output is what we'd consider to be acceptable. The combination of a small heat sink and proactive thermal protection technology is certainly favorable to burning the card or running at higher clocks with obnoxious fan speeds.

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    Top Comments
  • silverblue
    And now... fitting a Titan/780 Ti cooler to a 290X. ;)
    18
  • Other Comments
  • de5_Roy
    i've been waiting to read it for a while. it was very good.
    one aspect of gcn based radeons is that despite their low power use in entry level cards, all of them use higher amount of pwoer during bluray playback. both kepler and maxwell (gm107) use quite less. a single slot, low profile operation, a card with gpu like gm107 will be very suitable for htpc. not to mention the sheer amount of gaming performance advantage over other gfx card around the same power use. hopefully, the future 20nm gpus will introduce even more performance under the same power use.
    4
  • brarboy
    Amd and Nvidia in same boat. You really got my attention here :D
    8
  • silverblue
    And now... fitting a Titan/780 Ti cooler to a 290X. ;)
    18
  • AMD Radeon
    Sorry i edit this
    0
  • dish_moose
    I get a little cautious about making holes in multi layer pcbs and using metal screws. Without knowing the power plane structure and clearances, you gamble shorting out internal layers if you are not lucky/careful.-Bruce
    9
  • jamesedgeuk2000
    I think I have noticed a flaw with what you guys did here. The card only supply's power to the fan it doesn't regulate PWM or sense RPM, so am I correct in assuming that it's using voltage regulation to control fan speed and therefore doing it blind based on it's temperature curve? If so then as you have replaced the standard fan with a much weaker one you should really consider raising the fan curve to compensate.
    4
  • CodeMatias
    Why not use a K2000 cooler? also nvidia small die so it might work better, and K2000 is ~80W so it should cool the 750ti just fine.
    1
  • CodeMatias
    Quote:
    And now... fitting a Titan/780 Ti cooler to a 290X. ;)
    Asus already did... It doesn't work, the 290X just draws too much power
    1
  • Captain75
    I need a low profile version of the card though -_-
    3
  • AndrewJacksonZA
    267802 said:
    And now... fitting a Titan/780 Ti cooler to a 290X. ;)
    Yes silverblue, yes! :-)
    3
  • Onus
    I'm sorry, but this is NOT a "low profile" card. It is single-slot, but not low-profile. It needs to be able to fit in an InWin BK655.300 (or similar mITX case) to be low-profile. For that, the circuit board itself must be short.
    2
  • FormatC
    Quote:
    Why not use a K2000 cooler? also nvidia small die so it might work better, and K2000 is ~80W so it should cool the 750ti just fine.

    The cooler doesn't fit. Some caps and coils are too high and the distance between the holes is not compatible. I've tried other FirePro cards but it was not possible too...

    Quote:
    The card only supply's power to the fan it doesn't regulate PWM or sense RPM, so am I correct in assuming that it's using voltage regulation to control fan speed

    This fan is voltage controlled, right. The goal was to use Boost to limit the temps and show you that you lost only a little bit performance. I had no non-Ti in my hands to ise it. This slower card is really perfect for this kind of cooling :(

    Quote:
    I get a little cautious about making holes in multi layer pcbs and using metal screws.

    It is one of the rules, that around this holes is nothing. You have always 1 mm reserve and more ;)
    3
  • Pedasc
    Just to echo Onus the AMD card they took the cooler off of is "low profile". This card still has a full size PCB, it is not "low profile".
    1
  • FormatC
    The goal was only to show, that a low-profile and single-slot card might work. It's clear that nobody can take a saw and modify the reference board... :D
    4
  • AndrewJacksonZA
    482859 said:
    It's clear that nobody can take a saw and modify the reference board... :D
    <obligatory>Chuck Norris can.</obligatory> ;-)
    6
  • de5_Roy
    545051 said:
    482859 said:
    It's clear that nobody can take a saw and modify the reference board... :D
    <obligatory>Chuck Norris can.</obligatory> ;-)

    chuck norris does not need a saw to modify the reference nvidia pcb down to low profile form factor. he simply throws the card in the air and roundhouse kicks it to cutoff the excess height and into to the motherboard's pcie x16 slot. the shock wave from the roundhouse kick then causes the case re-assemble itself and the pc to start.
    8
  • vertexx
    Now if only someone would come out with a single-slot low-profile version. That would really be something!
    5
  • renz496
    47340 said:
    I'm sorry, but this is NOT a "low profile" card. It is single-slot, but not low-profile. It needs to be able to fit in an InWin BK655.300 (or similar mITX case) to be low-profile. For that, the circuit board itself must be short.


    then get this card and replace the heatsink

    http://www.galaxytech.com/__EN_GB__/Product2/ProductDetail?proID=517&isStop=0&isPack=False&isPow=False
    0
  • Onus
    Yeah, it can't be double-slot. I couldn't tell if it has the half-height bracket though, and the spec sheet doesn't list it as an accessory.
    0
  • RedJaron
    1606145 said:
    Quote:
    And now... fitting a Titan/780 Ti cooler to a 290X. ;)
    Asus already did... It doesn't work, the 290X just draws too much power

    The reason this didn't work is because the GK110 chip is quite a bit larger than Hawai'i. In Asus' case, two of the heat pipes don't even touch the chip and were useless.


    There's no reason a 780 type cooling solution can't be used, but you need to address the smaller surface area on the chip for optimal heat transference.
    3