NVIDIA GeForce 820M vs NVIDIA GeForce 800A
We compared two Mobile platform GPUs: 2GB VRAM GeForce 820M and 1024MB VRAM GeForce 800A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce 820M 's Advantages
Released 1 years late
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (28.83GB/s vs 14.40GB/s)
336 additional rendering cores
NVIDIA GeForce 800A 's Advantages
Lower TDP (15W vs 45W)
Score
Benchmark
FP32 (float)
GeForce 820M
+583%
0.622 TFLOPS
GeForce 800A
0.091 TFLOPS
Graphics Card
Mar 2015
Release Date
Mar 2014
GeForce 800M
Generation
GeForce 800A
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
901 MHz
Memory Clock
900 MHz
Memory
2GB
Memory Size
1024MB
DDR3
Memory Type
DDR3
128bit
Memory Bus
64bit
28.83GB/s
Bandwidth
14.40GB/s
Render Config
-
-
-
-
SM Count
1
384
Shading Units
48
32
TMUs
8
16
ROPs
4
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
128 KB
-
-
-
Theoretical Performance
6.480 GPixel/s
Pixel Rate
950.0 MPixel/s
25.92 GTexel/s
Texture Rate
3.800 GTexel/s
-
-
-
622.1 GFLOPS
FP32 (float)
91.20 GFLOPS
25.92 GFLOPS
FP64 (double)
7.600 GFLOPS
Board Design
45W
TDP
15W
-
-
-
No outputs
Outputs
No outputs
-
-
-
Graphics Processor
GK107
GPU Name
GF119
-
-
-
Kepler
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
1.27 billion
Transistors
0.292 billion
118 mm²
Die Size
79 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
1.1
1.1
Vulkan
N/A
3.0
CUDA
2.1
5.1
Shader Model
5.1
