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GPU Comparison
NVIDIA GeForce 840M vs NVIDIA GeForce GT 640M Mac Edition
NVIDIA GeForce 840M vs NVIDIA GeForce GT 640M Mac Edition
VS
NVIDIA GeForce 840M
NVIDIA GeForce GT 640M Mac Edition
We compared two Mobile platform GPUs: 2GB VRAM GeForce 840M and 512MB VRAM GeForce GT 640M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce 840M 's Advantages
Released 1 years and 1 months late
Boost Clock1124MHz
NVIDIA GeForce GT 640M Mac Edition 's Advantages
Larger VRAM bandwidth (40.00GB/s vs 16.02GB/s)
Lower TDP (32W vs 33W)
Score
Benchmark
FP32 (float)
GeForce 840M
+50%
0.863 TFLOPS
GeForce GT 640M Mac Edition
0.572 TFLOPS
GeForce 840M
VS
GeForce GT 640M Mac Edition
Graphics Card
Mar 2014
Release Date
Feb 2013
GeForce 800M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x8
Bus Interface
PCIe 3.0 x16
Clock Speeds
1029 MHz
Base Clock
-
1124 MHz
Boost Clock
-
1001 MHz
Memory Clock
1250 MHz
Memory
2GB
Memory Size
512MB
DDR3
Memory Type
GDDR5
64bit
Memory Bus
64bit
16.02GB/s
Bandwidth
40.00GB/s
Render Config
-
SM Count
-
-
Compute Units
-
384
Shading Units
384
16
TMUs
32
8
ROPs
8
-
Tensor Cores
-
-
RT Cores
-
64 KB (per SMM)
L1 Cache
16 KB (per SMX)
1024 KB
L2 Cache
128 KB
Theoretical Performance
8.992 GPixel/s
Pixel Rate
5.960 GPixel/s
17.98 GTexel/s
Texture Rate
23.84 GTexel/s
-
FP16 (half)
-
863.2 GFLOPS
FP32 (float)
572.2 GFLOPS
26.98 GFLOPS
FP64 (double)
23.84 GFLOPS
Graphics Processor
GM108
GPU Name
GK107
N15S-GT
GPU Variant
N13P-GS
Maxwell
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
Unknown
Transistors
1.27 billion
Unknown
Die Size
118 mm²
Board Design
33W
TDP
32W
-
Suggested PSU
-
No outputs
Outputs
No outputs
-
Power Connectors
-
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
5.0
CUDA
3.0
5.1
Shader Model
5.1
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