GeForce GT 640 vs GeForce GTX 1630: 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 GT 640 is better3
Memory bus 64 bit more128 bit vs 64 bit
Board power 10 W lower65 W (TDP) vs 75 W (TDP)
Launch price $50 lower$99 vs $149
Where GeForce GTX 1630 is better2
Video memory 2 GB more4 GB vs 2 GB
Memory bandwidth 67.5 GB/s more96 GB/s vs 28.5 GB/s
Benchmarks
Results are compared within one benchmark, one version and the same conditions.
Blender Benchmark 2.93.1
GPU, bmw27 (CUDA) · s, lower is better
GeForce GT 6401,298.5 sGeForce GTX 1630no dataNo advantage conclusion: no comparable result for the second model.
About the measurement and source
- A · NVIDIA GeForce GT 640
1,298.5 s · community measurement, sample 1 · November 14, 2026
Blender Open Data (Blender Foundation)
Median of 1 submissions (0 outliers excluded), interquartile range 1298.45–1298.45; submissions 2022-01-07 to 2022-01-07; CUDA backend. Snapshot 2026-11-14.
- B · NVIDIA GeForce GTX 1630
- 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 (8)
| Benchmark | A | B | Difference |
|---|---|---|---|
| Blender Benchmark 2.90GPU, bmw27 (CUDA) | 1,209.9 | — | no pair |
| Blender Benchmark 2.92GPU, bmw27 (CUDA) | 1,241.9 | — | no pair |
| Blender Benchmark 2.82GPU, classroom (CUDA) | 6,499.8 | — | no pair |
| Blender Benchmark 2.90GPU, fishy_cat (CUDA) | 3,537.9 | — | no pair |
| Blender Benchmark 3.5.0GPU, sum of scenes monster + junkshop + classroom (CUDA) | 36.7 | — | no pair |
| Blender Benchmark 3.6.0GPU, sum of scenes monster + junkshop + classroom (CUDA) | 31.9 | — | no pair |
| Blender Benchmark 3.5.0GPU, sum of scenes monster + junkshop + classroom (OptiX / HIP / oneAPI / Metal) | — | 283 | no pair |
| Blender Benchmark 4.4.0GPU, sum of scenes monster + junkshop + classroom (OptiX / HIP / oneAPI / Metal) | — | 247.6 | no pair |
Each benchmark version has its own scale: numbers are compared only within a row.
Specifications
| Specification | A · GeForce GT 640 | B · GeForce GTX 1630 | Difference |
|---|---|---|---|
| Chip | |||
| GPU chip | GK107-300-A2 | TU117-150-KA-A1 | differs |
| Architecture | Kepler | Turing | differs |
| Shader unitsShader unit counts are comparable only within one architecture. | 384 (CUDA cores) | 512 (CUDA cores) | not directly comparable |
| Clocks | |||
| Base clock | 902 MHz | 1,740 MHz | B: 838 MHz more |
| Boost clockClocks of different architectures do not reflect performance directly. For laptop chips, the clock depends on the laptop’s power limit. | no data | 1,785 MHz | no data for A |
| Memory | |||
| Video memory | 2 GB | 4 GB | B: 2 GB more |
| Memory type | DDR3 | GDDR6 | differs |
| Memory bus | 128 bit | 64 bit | A: 64 bit more |
| Memory bandwidthExcludes cache (Infinity Cache / L2), which affects effective bandwidth differently. | 28.5 GB/s | 96 GB/s | B: 67.5 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. | 65 W (TDP) | 75 W (TDP) | B: 10 W higher |
| Interface | PCIe 3.0 x16 | no data | no data for B |
Chip
GPU chip
AGK107-300-A2
BTU117-150-KA-A1
differsArchitecture
AKepler
BTuring
differsShader units
A384 (CUDA cores)
B512 (CUDA cores)
not directly comparableShader unit counts are comparable only within one architecture.
Clocks
Base clock
A902 MHz
B1,740 MHz
B: 838 MHz moreBoost clock
Ano data
B1,785 MHz
no data for AClocks of different architectures do not reflect performance directly. For laptop chips, the clock depends on the laptop’s power limit.
Memory
Video memory
A2 GB
B4 GB
B: 2 GB moreMemory type
ADDR3
BGDDR6
differsMemory bus
A128 bit
B64 bit
A: 64 bit moreMemory bandwidth
A28.5 GB/s
B96 GB/s
B: 67.5 GB/s moreExcludes cache (Infinity Cache / L2), which affects effective bandwidth differently.
Power and dimensions
Board power
A65 W (TDP)
B75 W (TDP)
B: 10 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
Bno data
no data for B
“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
How much video memory do NVIDIA GeForce GT 640 and NVIDIA GeForce GTX 1630 have?
NVIDIA GeForce GT 640: 2 GB DDR3, 128-bit bus. NVIDIA GeForce GTX 1630: 4 GB GDDR6, 64-bit bus.
See also
Data sources (2)
- Wikipedia (English) — specifications of NVIDIA GeForce GT 640, specifications of NVIDIA GeForce GTX 1630, release date and launch pricechecked November 14, 2026
- Blender Open Data (Blender Foundation) — benchmark Blender Benchmark 2.90, benchmark Blender Benchmark 2.92, benchmark Blender Benchmark 2.93.1, benchmark Blender Benchmark 2.82, benchmark Blender Benchmark 3.5.0, benchmark Blender Benchmark 3.6.0, benchmark Blender Benchmark 4.4.0checked November 14, 2026
How we compare: methodology. Where the data comes from: sources.