NVIDIA GeForce GT 820M vs AMD Radeon R9 M385X
We compared two Mobile platform GPUs: 1024MB VRAM GeForce GT 820M and 4GB VRAM Radeon R9 M385X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 M385X 's Advantages
Released 1 years and 6 months late
Boost Clock1100MHz
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (76.80GB/s vs 14.40GB/s)
800 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 820M
0.298 TFLOPS
Radeon R9 M385X
+561%
1.971 TFLOPS
Graphics Card
Nov 2013
Release Date
May 2015
GeForce 800M
Generation
Gem System
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
1000 MHz
-
Boost Clock
1100 MHz
900 MHz
Memory Clock
1200 MHz
Memory
1024MB
Memory Size
4GB
DDR3
Memory Type
GDDR5
64bit
Memory Bus
128bit
14.40GB/s
Bandwidth
76.80GB/s
Render Config
-
Compute Units
14
2
SM Count
-
96
Shading Units
896
16
TMUs
56
8
ROPs
16
-
-
-
-
-
-
64 KB (per SM)
L1 Cache
16 KB (per CU)
128 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
3.100 GPixel/s
Pixel Rate
17.60 GPixel/s
12.40 GTexel/s
Texture Rate
61.60 GTexel/s
-
-
-
297.6 GFLOPS
FP32 (float)
1.971 TFLOPS
24.80 GFLOPS
FP64 (double)
123.2 GFLOPS
Board Design
15W
TDP
Unknown
-
-
-
No outputs
Outputs
Portable Device Dependent
-
-
-
Graphics Processor
GF117
GPU Name
Strato
N15V-GM
GPU Variant
Strato XT
Fermi 2.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
0.585 billion
Transistors
2.08 billion
116 mm²
Die Size
160 mm²
Graphics Features
12 (11_0)
DirectX
12 (12_0)
4.6
OpenGL
4.6
1.1
OpenCL
2.1
N/A
Vulkan
1.2.170
2.1
CUDA
-
5.1
Shader Model
6.5
