NVIDIA GeForce GTX 645
Kepler GPU best suited to lighter Blender scenes, learning workflows, and budget-conscious rendering setups.
Last updated: March 31, 2026
41
Entry-level speed — fine for learning and lighter scenes.
1 GB
Limited — best for simpler scenes and lighter workflows.
576
Lower core count — adequate for lighter rendering workloads.
Kepler
Older architecture — check benchmark scores for a practical performance picture.
64 GB/s
Lower bandwidth may become a bottleneck in texture-heavy or complex scenes.
824 MHz
Lower clock speed — typical of older or workstation-class GPUs.
CUDA
CUDA provides the primary GPU rendering path in Blender Cycles.
65 W
Low power — easy to cool and efficient for smaller builds.
2013
More technical details
Core specs
- Base clock: 824 MHz
- Process size: 28 nm
Memory specs
- Memory type: GDDR5
- Memory bus: 128-bit
Benchmark performance
This chart gives a compact estimate of how this GPU handles Blender benchmark scenes, so you can compare practical rendering speed without reading raw benchmark tables.
These timings are derived from Blender Open Data benchmark medians and should be treated as comparative estimates, not guaranteed real-project render times.
View Blender Open Data sourceIs GTX 645 good for Blender?
A concise editorial read on where this GPU looks strong, the tradeoffs to keep in mind, and who it suits best.
What stands out
- Kepler architecture
- 28 nm process size
- 576 CUDA cores for basic parallel processing
- Base and boost clock speeds at 824 MHz
Tradeoffs to know
- Only 1 GB of VRAM limits rendering of complex scenes
- Older architecture may struggle with modern Blender features
Who should choose it
- Suitable for basic 3D rendering tasks on older systems
- Cost-effective for entry-level users
Compare GTX 645 to…
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