NVIDIA GeForce 840M vs NVIDIA GeForce GT 640

Comparative analysis of NVIDIA GeForce 840M and NVIDIA GeForce GT 640 videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory, Technologies. Benchmark videocards performance analysis: PassMark - G3D Mark, PassMark - G2D Mark, Geekbench - OpenCL, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps), 3DMark Fire Strike - Graphics Score.

 

Differences

Reasons to consider the NVIDIA GeForce 840M

• Videocard is newer: launch date 1 year(s) 9 month(s) later
• Around 14% higher core clock speed: 1029 MHz vs 902 MHz
• Around 25% better floating-point performance: 863.2 gflops vs 692.7 gflops
• Around 97% lower typical power consumption: 33 Watt vs 65 Watt
• 2x more maximum memory size: 4 GB vs 2 GB
• Around 12% higher memory clock speed: 2002 MHz vs 1782 MHz
• Around 53% better performance in Geekbench - OpenCL: 5771 vs 3771
• 2x better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 22.848 vs 11.448
• Around 56% better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 1.237 vs 0.792
• Around 44% better performance in CompuBench 1.5 Desktop - Video Composition (Frames/s): 21.15 vs 14.637
• 4.6x better performance in CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s): 95.545 vs 20.86
• Around 15% better performance in GFXBench 4.0 - Manhattan (Frames): 2736 vs 2375
• Around 15% better performance in GFXBench 4.0 - Manhattan (Fps): 2736 vs 2375

Reasons to consider the NVIDIA GeForce GT 640

• Around 61% higher texture fill rate: 28.86 GTexel / s vs 17.98 GTexel / s
• Around 7% better performance in PassMark - G3D Mark: 1170 vs 1096
• Around 95% better performance in PassMark - G2D Mark: 295 vs 151
• Around 27% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 206.777 vs 162.594
• Around 2% better performance in GFXBench 4.0 - Car Chase Offscreen (Frames): 2134 vs 2085
• Around 4% better performance in GFXBench 4.0 - T-Rex (Frames): 3328 vs 3191
• Around 2% better performance in GFXBench 4.0 - Car Chase Offscreen (Fps): 2134 vs 2085
• Around 4% better performance in GFXBench 4.0 - T-Rex (Fps): 3328 vs 3191
• 3.1x better performance in 3DMark Fire Strike - Graphics Score: 1565 vs 503

Compare benchmarks

GPU 1: NVIDIA GeForce 840M
GPU 2: NVIDIA GeForce GT 640

PassMark - G3D Mark	GPU 1 GPU 2	1096 1170
PassMark - G2D Mark	GPU 1 GPU 2	151 295
Geekbench - OpenCL	GPU 1 GPU 2	5771 3771
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	GPU 1 GPU 2	22.848 11.448
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	GPU 1 GPU 2	162.594 206.777
CompuBench 1.5 Desktop - T-Rex (Frames/s)	GPU 1 GPU 2	1.237 0.792
CompuBench 1.5 Desktop - Video Composition (Frames/s)	GPU 1 GPU 2	21.15 14.637
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	GPU 1 GPU 2	95.545 20.86
GFXBench 4.0 - Car Chase Offscreen (Frames)	GPU 1 GPU 2	2085 2134
GFXBench 4.0 - Manhattan (Frames)	GPU 1 GPU 2	2736 2375
GFXBench 4.0 - T-Rex (Frames)	GPU 1 GPU 2	3191 3328
GFXBench 4.0 - Car Chase Offscreen (Fps)	GPU 1 GPU 2	2085 2134
GFXBench 4.0 - Manhattan (Fps)	GPU 1 GPU 2	2736 2375
GFXBench 4.0 - T-Rex (Fps)	GPU 1 GPU 2	3191 3328
3DMark Fire Strike - Graphics Score	GPU 1 GPU 2	503 1565

Compare specifications (specs)