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GPU Comparison
NVIDIA GeForce GT 820M vs NVIDIA GeForce GT 640M LE
NVIDIA GeForce GT 820M vs NVIDIA GeForce GT 640M LE
VS
NVIDIA GeForce GT 820M
NVIDIA GeForce GT 640M LE
We compared two Mobile platform GPUs: 1024MB VRAM GeForce GT 820M and 2GB VRAM GeForce GT 640M LE to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 820M 's Advantages
Released 1 years and 6 months late
Lower TDP (15W vs 32W)
NVIDIA GeForce GT 640M LE 's Advantages
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (50.24GB/s vs 14.40GB/s)
Score
Benchmark
FP32 (float)
GeForce GT 820M
+3%
0.298 TFLOPS
GeForce GT 640M LE
0.289 TFLOPS
GeForce GT 820M
VS
GeForce GT 640M LE
Graphics Card
Nov 2013
Release Date
May 2012
GeForce 800M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
900 MHz
Memory Clock
785 MHz
Memory
1024MB
Memory Size
2GB
DDR3
Memory Type
GDDR5
64bit
Memory Bus
128bit
14.40GB/s
Bandwidth
50.24GB/s
Render Config
2
SM Count
2
-
Compute Units
-
96
Shading Units
96
16
TMUs
16
8
ROPs
4
-
Tensor Cores
-
-
RT Cores
-
64 KB (per SM)
L1 Cache
64 KB (per SM)
128 KB
L2 Cache
256 KB
Theoretical Performance
3.100 GPixel/s
Pixel Rate
3.012 GPixel/s
12.40 GTexel/s
Texture Rate
12.05 GTexel/s
-
FP16 (half)
-
297.6 GFLOPS
FP32 (float)
289.0 GFLOPS
24.80 GFLOPS
FP64 (double)
24.08 GFLOPS
Graphics Processor
GF117
GPU Name
GF108
N15V-GM
GPU Variant
-
Fermi 2.0
Architecture
Fermi
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
0.585 billion
Transistors
0.585 billion
116 mm²
Die Size
116 mm²
Board Design
15W
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
1.1
OpenCL
1.1
N/A
Vulkan
N/A
2.1
CUDA
2.1
5.1
Shader Model
5.1
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