NVIDIA
GeForce GTX 660 vs GeForce 940MX
Full comparison of specs, performance and benchmarks
NVIDIA
GeForce 940MX
Aggregate performance score
We've compared GTX 660 and GeForce 940MX across specs and all relevant benchmarks.
↗GTX 660 outperforms GeForce 940MX by ~10% on the catalog index; this is not a measured FPS gain.+10%
Scores are normalized on the Head to Head scale. Higher is better. How is this calculated?H2HBench Data Quality
Low confidenceSpecifications: Field verification not recordedVerified gaming results: 0Estimated / unverified results: 32Price record updated: Sep 6, 2026
Limited verified data
H2HBench Verdict
Higher catalog score: GeForce GTX 660 (~17%)
The score difference is not a measured FPS improvement.
Reasons to consider GTX 660
- Higher catalog performance index
- Higher catalog value index
- Recorded feature support: OpenCL 3.0, CUDA 3.0 · Not supported
Reasons to consider GeForce 940MX
- Lower stated power consumption
- Recorded feature support: OpenCL 3.0, CUDA 5.0 · Not supported
Catalog metrics radar
Axes with missing data are hidden; every value uses a fixed scale.
NVIDIAPerformance
Efficiency
Price / performance
Memory capacity
3330
79100
10054
5656
Graphics card ranking
Positions 193–198of 321
Which should you choose?
Two practical conclusions based on community votes and gaming value.
GeForce GTX 660
100 likesHead to Head visitors currently choose this model more often.
Overview
Scores are calculated from specifications, performance, and efficiency.
GamesDirectX, OpenCL, and Vulkan performance
33Better
30
Professional applications3D modeling, video editing, and rendering
30Better
28
AI and machine learningMachine-learning and AI capabilities
28Better
26
Power efficiencyPower consumption across workloads
79
100Better
Head to Head scoreOverall catalog score
49Better
42
Specifications
The better numeric value is highlighted in green, taking the metric direction into account.
DisplayPort
HDMI
Device class
USB Type-C
DirectX
Vulkan
OpenGL
TFLOPSBetter
Power consumptionBetter
Release date
Architecture
Process node
Clock speedBetter
Memory type
Power connector
Thickness
Base clockBetter
Boost clockBetter
VRAMBetter
Memory frequencyBetter
Memory busBetter
Memory bandwidthBetter
Interface
Power consumptionBetter
Recommended PSU
Max monitors
Max resolution
Length
Compute API
Launch price—
Shader units / coresBetter
Die sizeBetter
Memory cache
Transistor countBetter
Upscaling
Gaming FPS
Available results are shown separately; missing data is not treated as zero.
The Gaming FPS section compares GTX 660 and GeForce 940MX across curated H2H Lab game presets. The useful signal is not only average FPS, but also how each device behaves at 1440p and 4K, how memory capacity and bus width affect heavy textures, and whether the game engine favors raster performance, ray tracing, or driver maturity.
GTX 660GeForce 940MX
Verified externalEstimatedSources ↗
Counter-Strike 2
1080p High
167 FPS
154 FPS
1080p Ultra
114 FPS
108 FPS
1440p Ultra
64 FPS
58 FPS
4K Ultra
23 FPS
21 FPS
Counter-Strike 2GTX 660167 FPSGeForce 940MX154 FPSGTX 660114 FPSGeForce 940MX108 FPSGTX 66064 FPSGeForce 940MX58 FPSGTX 66023 FPSGeForce 940MX21 FPS
Cyberpunk 2077GTX 660108 FPSGeForce 940MX99 FPSGTX 66090 FPSGeForce 940MX85 FPSGTX 66046 FPSGeForce 940MX42 FPSGTX 66015 FPSGeForce 940MX14 FPS
Forza Horizon 5GTX 660136 FPSGeForce 940MX125 FPSGTX 66085 FPSGeForce 940MX81 FPSGTX 66057 FPSGeForce 940MX52 FPSGTX 66033 FPSGeForce 940MX31 FPS
Hogwarts LegacyGTX 66088 FPSGeForce 940MX81 FPSGTX 66071 FPSGeForce 940MX68 FPSGTX 66041 FPSGeForce 940MX38 FPSGTX 66015 FPSGeForce 940MX14 FPS
H2H workload indices
Comparable internal indices on a fixed 0–100 scale.
H2H Raster IndexH2H Index / 100333010%
H2H Compute IndexH2H Index / 10037348%
H2H Rendering IndexH2H Index / 10039375%
H2H Memory Workload IndexH2H Index / 10056560%
H2H Efficiency IndexH2H Index / 1007910023%
These are versioned H2H calculated indices derived from normalized catalog data. They are not results from a third-party benchmark.
H2H AI workload indices
Estimated workload profiles based on available performance and memory data.
H2H Image Generation IndexH2H Index / 10043422%
H2H ML Training IndexH2H Index / 10042405%
H2H Inference IndexH2H Index / 10039375%
H2H Local LLM IndexH2H Index / 10045442%
H2H Computer Vision IndexH2H Index / 10040385%
These are versioned H2H calculated indices derived from normalized catalog data. They are not results from a third-party benchmark.
Graphics APIs, SDKs and upscaling
DirectX11.011.0
Vulkan1.21.4
OpenGL4.64.6
UpscalingNot supportedNot supported
Compute APIOpenCL 3.0, CUDA 3.0OpenCL 3.0, CUDA 5.0
Architecture and release
ArchitectureKeplerMaxwell
Process node28 nm28 nm
Release date20122016
Device classDesktopMobile
GPU cores, die and clocks
Transistor count2540 millionBetter1020 million
Die size221 mm²77 mm²Better
Shader units / cores960Better384
Base clock980 MHzBetter954 MHz
Boost clock1032 MHzBetter993 MHz
Board size, power and compatibility
InterfacePCIe 3x16PCIe 3.0 x8
Length241 mmOEM dependent
ThicknessDual-slotIGP
Recommended PSU300 WOEM dependent
Power connector6 pinNone
Display outputs and limits
HDMIHDMI 1.4aOEM dependent
DisplayPortDisplayPort 1.2OEM dependent
USB Type-CNoOEM dependent
Max monitors4OEM dependent
Max resolution4096 × 2160Depends on host system
Memory and compute throughput
VRAM2 GB GDDR5Better1 GB GDDR5
Memory typeGDDR5GDDR5 / DDR3
Memory bus192 bitBetter64 bit
TFLOPS1.981Better0.763
Other comparisons
Reviews and questions
Explain this comparison
Beyond percentages: causes, relevant specifications, and practical impact behind every chart.
What AI will explain
Overall score, radar, FPS, synthetic tests, specifications, efficiency, and value.
Evidence details
Data coverage
- Verified gaming results
- 0
- Verified synthetic results
- 0
- Games with verified results
- 0
- Verified community results
- 0
- Estimated / unverified results
- 32
- Specifications
- 0 / 69
Calculated scores · How is this calculated?
Scores use the catalog model and may include estimated inputs. Open each score to see its origin and the methodology.
clamp(round(performance × 0.7 + (efficiency ?? 50) × 0.2 + (value is missing ? 0 : (value − 50) × 0.2)), 0, 100)Price evidence · View sources (4)
Verified community results
No verified community benchmarks yet.
Reviewed by
No individual editorial review is recorded for this comparison.
Comparison history
Show recorded changes (3)
- · Record updated: products
- · Record updated: products
- · Record updated: products
Why you can trust this comparison
Origin and confidence are evaluated from the evidence attached to each value. Unverified results are identified, and specification, benchmark and price dates remain separate.
Owner experiences
Real builds, results, and community feedback.
Moderator reviewedHelpful to the communityExpert badges
Frequently asked comparison questions
Short recommendations based on performance, memory, power consumption, and intended use.
01Which is better for gaming: GTX 660 or GeForce 940MX?+
GTX 660 has the higher overall gaming score, while GTX 660 offers the better price-to-performance ratio. The final choice depends on resolution and settings.
02Which is better for streaming?+
GTX 660 is the stronger streaming choice thanks to performance, hardware encoding, and application support. Check AV1, H.264, and HEVC support before buying.
03Which is better for Blender?+
GTX 660 is generally the better option for Blender and GPU rendering. Rendering-engine support and available VRAM also matter.
04Which is better for video editing?+
GTX 660 offers more overall performance, while GTX 660 offers more memory headroom. Codecs, hardware encoders, and editor optimization can change the result.
05Which is better for neural networks and AI?+
GTX 660 is the more practical option for local AI workloads. VRAM capacity, compute libraries, and framework compatibility are especially important.
06Which is better for 1080p?+
GTX 660 is the most rational 1080p choice, where high frame rates and cost per frame matter most.
07Which is better for 1440p?+
GTX 660 leads in combined 1440p performance. GTX 660 can be preferable for heavy textures and games with high VRAM usage.
08Which is better for 4K?+
GTX 660 is preferable for 4K, where total performance, memory bandwidth, and VRAM capacity have the greatest impact.
09Which is better for a quiet PC?+
GeForce 940MX is easier to use in a quiet build because of its lower estimated power and thermal load. Actual noise depends on the specific cooler.
10Which is better without replacing the power supply?+
GeForce 940MX is the safer candidate because its stated power consumption is lower. Verify PSU wattage, age, and power connectors.
11Is it worth upgrading from the previous generation?+
Consider upgrading to GTX 660 if your current device no longer delivers the required FPS, memory capacity, or feature support. A gain below 15–20% is usually worth waiting for a price cut.