NVIDIA GeForce GTX 770M vs NVIDIA GeForce 820A
We compared two Mobile platform GPUs: 3GB VRAM GeForce GTX 770M and 1024MB VRAM GeForce 820A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 770M 's Advantages
Boost Clock797MHz
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (96.19GB/s vs 14.40GB/s)
864 additional rendering cores
NVIDIA GeForce 820A 's Advantages
Released 10 months late
Lower TDP (15W vs 75W)
Score
Benchmark
FP32 (float)
GeForce GTX 770M
+413%
1.53 TFLOPS
GeForce 820A
0.298 TFLOPS
Graphics Card
May 2013
Release Date
Mar 2014
GeForce 700M
Generation
GeForce 800A
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 2.0 x16
Clock Speeds
706 MHz
Base Clock
-
797 MHz
Boost Clock
-
1002 MHz
Memory Clock
900 MHz
Memory
3GB
Memory Size
1024MB
GDDR5
Memory Type
DDR3
192bit
Memory Bus
64bit
96.19GB/s
Bandwidth
14.40GB/s
Render Config
-
-
-
-
SM Count
2
960
Shading Units
96
80
TMUs
16
24
ROPs
8
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
64 KB (per SM)
384 KB
L2 Cache
128 KB
-
-
-
Theoretical Performance
15.94 GPixel/s
Pixel Rate
3.100 GPixel/s
63.76 GTexel/s
Texture Rate
12.40 GTexel/s
-
-
-
1.530 TFLOPS
FP32 (float)
297.6 GFLOPS
63.76 GFLOPS
FP64 (double)
24.80 GFLOPS
Board Design
75W
TDP
15W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-
Graphics Processor
GK106
GPU Name
GF117
N14E-GS-A1
GPU Variant
N15V-GM
Kepler
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.54 billion
Transistors
0.585 billion
221 mm²
Die Size
116 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
