GeForce 840M vs GeForce GT 755M: specs and benchmark comparison
Short verdict
Not enough data for a performance conclusion: the database has no comparable benchmarks for this pair. Below are the key differences in official specifications.
Compare with AIAdvantages
Only measured and rated values: a noticeable benchmark gap and specs where more is better.
Where GeForce 840M is better1
Board power 20 W lower30 W (TDP) vs 50 W (TDP)
Where GeForce GT 755M is better2
Memory bus 64 bit more128 bit vs 64 bit
Memory bandwidth 70.4 GB/s more86.4 GB/s vs 16 GB/s
Benchmarks
Results are compared within one benchmark, one version and the same conditions. Laptop chip results depend on the laptop model: its maker sets the power limit and cooling.
Blender Benchmark 2.93.1
GPU, bmw27 (CUDA) · s, lower is better
GeForce 840M716.1 sGeForce GT 755Mno dataNo advantage conclusion: no comparable result for the second model.
About the measurement and source
- A · NVIDIA GeForce 840M
716.1 s · community measurement, sample 1 · November 14, 2026
Blender Open Data (Blender Foundation)
Median of 1 submissions (0 outliers excluded), interquartile range 716.1–716.1; submissions 2021-07-17 to 2021-07-17; CUDA backend. Snapshot 2026-11-14.
- B · NVIDIA GeForce GT 755M
- no comparable result
difference = |A − B| ÷ the smaller value × 100%. The 5% noticeable threshold is a UX heuristic, not statistical significance.
Render time of a single Cycles scene without synchronization. Median of submissions after filtering.
Reference results (26)
| Benchmark | A | B | Difference |
|---|---|---|---|
| Blender Benchmark 2.82GPU, bmw27 (CUDA) | 868.6 | — | no pair |
| Blender Benchmark 2.83GPU, bmw27 (CUDA) | 889.4 | — | no pair |
| Blender Benchmark 2.90GPU, bmw27 (CUDA) | 893.7 | — | no pair |
| Blender Benchmark 2.92GPU, bmw27 (CUDA) | 860.4 | — | no pair |
| Blender Benchmark 2.92GPU, bmw27 (OPTIX) | 991.3 | — | no pair |
| Blender Benchmark 2.82GPU, classroom (CUDA) | 2,871.8 | — | no pair |
| Blender Benchmark 2.90GPU, classroom (CUDA) | 2,953 | — | no pair |
| Blender Benchmark 2.93.1GPU, classroom (CUDA) | 2,554.6 | — | no pair |
| Blender Benchmark 2.90GPU, fishy_cat (CUDA) | 1,790.4 | — | no pair |
| Blender Benchmark 2.93.1GPU, fishy_cat (CUDA) | 1,979.7 | — | no pair |
| Blender Benchmark 2.90GPU, koro (CUDA) | 3,088.4 | — | no pair |
| Blender Benchmark 2.90GPU, pavillon_barcelona (CUDA) | 4,657.7 | — | no pair |
| Blender Benchmark 2.90GPU, victor (CUDA) | 98,992 | — | no pair |
| Blender Benchmark 3.0.1GPU, sum of scenes monster + junkshop + classroom (CUDA) | 24.7 | — | no pair |
| Blender Benchmark 4.0.0GPU, sum of scenes monster + junkshop + classroom (CUDA) | 66.9 | — | no pair |
| Blender Benchmark 4.5.0GPU, sum of scenes monster + junkshop + classroom (OptiX / HIP / oneAPI / Metal) | 45.1 | — | no pair |
| Blender Benchmark 3.2.1GPU, sum of scenes monster + junkshop + classroom (OptiX / HIP / oneAPI / Metal) | 47.7 | — | no pair |
| Blender Benchmark 4.3.0GPU, sum of scenes monster + junkshop + classroom (OptiX / HIP / oneAPI / Metal) | 42.8 | — | no pair |
| Blender Benchmark 2.81GPU, bmw27 (CUDA) | — | 867.9 | no pair |
| Blender Benchmark 2.81aGPU, bmw27 (CUDA) | — | 876.7 | no pair |
| Blender Benchmark 2.91.2GPU, bmw27 (CUDA) | — | 908.3 | no pair |
| Blender Benchmark 2.92GPU, classroom (CUDA) | — | 4,519 | no pair |
| Blender Benchmark 2.81GPU, fishy_cat (CUDA) | — | 1,682.3 | no pair |
| Blender Benchmark 3.3.0GPU, sum of scenes monster + junkshop + classroom (CUDA) | — | 53.7 | no pair |
| Blender Benchmark 3.4.0GPU, sum of scenes monster + junkshop + classroom (CUDA) | — | 53.7 | no pair |
| Blender Benchmark 4.5.0GPU, sum of scenes monster + junkshop + classroom (CUDA) | — | 67.9 | no pair |
Each benchmark version has its own scale: numbers are compared only within a row.
Specifications
Chip maker values. The laptop maker sets the power limit and clocks in each laptop.
| Specification | A · GeForce 840M | B · GeForce GT 755M | Difference |
|---|---|---|---|
| Chip | |||
| GPU chip | GM108 | GK107 | differs |
| Architecture | Maxwell | Kepler | differs |
| Clocks | |||
| Base clock | 1,029 MHz | 1,020 MHz | A: 9 MHz more |
| Memory | |||
| Video memory | no data | 2 GB | no data for A |
| Memory type | DDR3 | GDDR5 | differs |
| Memory bus | 64 bit | 128 bit | B: 64 bit more |
| Memory bandwidthExcludes cache (Infinity Cache / L2), which affects effective bandwidth differently. | 16 GB/s | 86.4 GB/s | B: 70.4 GB/s more |
| Power and dimensions | |||
| Board powerTGP (NVIDIA) and TBP (AMD/Intel) are calculated differently; higher is not better. For laptops, the chip maker sets the range and the laptop maker picks the value, so the same chip behaves differently in different laptops. | 30 W (TDP) | 50 W (TDP) | B: 20 W higher |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 | equal |
Chip
GPU chip
AGM108
BGK107
differsArchitecture
AMaxwell
BKepler
differs
Clocks
Base clock
A1,029 MHz
B1,020 MHz
A: 9 MHz more
Memory
Video memory
Ano data
B2 GB
no data for AMemory type
ADDR3
BGDDR5
differsMemory bus
A64 bit
B128 bit
B: 64 bit moreMemory bandwidth
A16 GB/s
B86.4 GB/s
B: 70.4 GB/s moreExcludes cache (Infinity Cache / L2), which affects effective bandwidth differently.
Power and dimensions
Board power
A30 W (TDP)
B50 W (TDP)
B: 20 W higherTGP (NVIDIA) and TBP (AMD/Intel) are calculated differently; higher is not better. For laptops, the chip maker sets the range and the laptop maker picks the value, so the same chip behaves differently in different laptops.
Interface
APCIe 3.0 x16
BPCIe 3.0 x16
equal
“More” does not always mean “better”: higher power draw or size is a system requirement, not an advantage (such bars are dimmed).
Compare with AI
An AI model reviews the specs and benchmarks of this pair and gives a plain-language verdict on who each model suits.
Questions and answers
Which PCIe interface do the cards use?
NVIDIA GeForce 840M: PCIe 3.0 x16. NVIDIA GeForce GT 755M: PCIe 3.0 x16.
See also
Data sources (2)
- Wikipedia (English) — specifications of NVIDIA GeForce 840M, specifications of NVIDIA GeForce GT 755M, release date and launch pricechecked November 14, 2026
- Blender Open Data (Blender Foundation) — benchmark Blender Benchmark 2.82, benchmark Blender Benchmark 2.83, benchmark Blender Benchmark 2.90, benchmark Blender Benchmark 2.92, benchmark Blender Benchmark 2.93.1, benchmark Blender Benchmark 2.81, benchmark Blender Benchmark 2.81a, benchmark Blender Benchmark 2.91.2, benchmark Blender Benchmark 3.0.1, benchmark Blender Benchmark 4.0.0, benchmark Blender Benchmark 3.3.0, benchmark Blender Benchmark 3.4.0, benchmark Blender Benchmark 4.5.0, benchmark Blender Benchmark 3.2.1, benchmark Blender Benchmark 4.3.0checked November 14, 2026
How we compare: methodology. Where the data comes from: sources.