General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
Pipelines / CUDA cores512384CUDA cores512no dataCore clock speed1020 MHz1029 MHzBoost clock speed1085 MHz1124 MHzNumber of transistors1,870 millionno dataManufacturing process technology28 nm28 nmPower consumption [TDP]55 Watt33 WattMaximum GPU temperature95 °Cno dataTexture fill rate34.7217.98Floating-point performance1,111 gflops863.2 gflops
Size and compatibility
Information on GeForce GTX 750 and GeForce 840M compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus [motherboard compatibility], additional power connectors [power supply compatibility]. For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.
Laptop sizeno datamedium sizedBus supportPCI Express 3.0PCI Express 2.0, PCI Express 3.0InterfacePCIe 3.0 x16PCIe 3.0 x8Length5.7" [14.5 cm]no dataHeight4.376" [11.1 cm]no dataWidth2-slotno dataSupplementary power connectorsNoneno data
Memory
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated VRAM and use a shared part of system RAM.
Memory typeGDDR5DDR3Maximum RAM amount4 GB4 GBMemory bus width128 Bit64 BitMemory clock speed5.0 GB/s2000 MHzMemory bandwidth80 GB/s16.02 GB/sShared memoryno data-
Video outputs and ports
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones [so-called Founders Edition for NVIDIA chips]. OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
Display ConnectorsOne Dual Link DVI-I, One Dual Link DVI-D, One mini-HDMINo outputsMulti monitor support3 displaysno dataHDMI+no dataHDCP+no dataMaximum VGA resolution2048x1536no dataAudio input for HDMIInternalno data
Technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
Blu Ray 3D+no data3D Gaming+no data3D Vision+no dataGPU Boostno data2.0Optimusno data+GameWorksno data+3D Vision Live+no data
API support
List of supported graphics and general-purpose computing APIs, including their specific versions.
DirectX12 [11_0]12 [11_0]Shader Model5.15.1OpenGL4.44.5OpenCL1.21.2Vulkan1.1.1261.1.126CUDA++
Synthetic benchmark performance
Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
GTX 750 outperforms 840M by 210% in our combined benchmark results.
Passmark
This is probably the most ubiquitous benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 [the last being done in 4K resolution if possible], and few more tests engaging DirectCompute capabilities.
Benchmark coverage: 25%
GTX 750 outperforms 840M by 211% in Passmark.
3DMark Fire Strike Graphics
Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature seemingly made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.
Benchmark coverage: 14%
GTX 750 outperforms 840M by 152% in 3DMark Fire Strike Graphics.
GeekBench 5 OpenCL
Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.
Benchmark coverage: 9%
GTX 750 outperforms 840M by 70% in GeekBench 5 OpenCL.
GeekBench 5 Vulkan
Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses Vulkan API by AMD & Khronos Group.
Benchmark coverage: 5%
GTX 750 outperforms 840M by 88% in GeekBench 5 Vulkan.
GeekBench 5 CUDA
Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses CUDA API by NVIDIA.
Benchmark coverage: 4%
GTX 750 outperforms 840M by 88% in GeekBench 5 CUDA.
Octane Render OctaneBench
This is a special benchmark measuring graphics card performance in OctaneRender, which is a realistic GPU rendering engine by OTOY Inc., available either as a standalone program, or as a plugin for 3DS Max, Cinema 4D and many other apps. It renders four different static scenes, then compares render times with a reference GPU which is currently GeForce GTX 980. This benchmark has nothing to do with gaming and is aimed at professional 3D graphics artists.
Benchmark coverage: 4%
GTX 750 outperforms 840M by 133% in Octane Render OctaneBench.
Mining hashrates
Cryptocurrency mining performance of GeForce GTX 750 and GeForce 840M. Usually measured in megahashes per second.
Bitcoin / BTC [SHA256] 143 Mh/s 92 Mh/s
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Average FPS across all PC games
Here are the average frames per second in a large set of popular games across different resolutions:
900p130−140 45 Full HD55−60 18
Advantages and disadvantages
Performance score 8.66 2.79 Memory bus width 128 64 Pipelines / CUDA cores 512 384 Memory bandwidth 80 16.02 Power consumption [TDP] 55 Watt 33 Watt
The GeForce GTX 750 is our recommended choice as it beats the GeForce 840M in performance tests.
Be aware that GeForce GTX 750 is a desktop card while GeForce 840M is a notebook one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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GeForce GTX 750
GeForce 840M
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