Home GPU Comparison AMD Radeon R9 M390 Mac Edition vs NVIDIA GeForce GTX 850A

AMD Radeon R9 M390 Mac Edition vs NVIDIA GeForce GTX 850A

We compared two Mobile platform GPUs: 2GB VRAM Radeon R9 M390 Mac Edition and 2GB VRAM GeForce GTX 850A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M390 Mac Edition 's Advantages
Released 1 years and 2 months late
Larger VRAM bandwidth (174.7GB/s vs 28.80GB/s)
384 additional rendering cores
NVIDIA GeForce GTX 850A 's Advantages
Boost Clock936MHz
Lower TDP (45W vs 80W)

Score

Benchmark

FP32 (float)
Radeon R9 M390 Mac Edition +63%
1.962 TFLOPS
GeForce GTX 850A
1.198 TFLOPS
VS

Graphics Card

May 2015
Release Date
Mar 2014
Crystal System
Generation
GeForce 800A
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
Base Clock
902 MHz
-
Boost Clock
936 MHz
1365 MHz
Memory Clock
900 MHz

Memory

2GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
128bit
174.7GB/s
Bandwidth
28.80GB/s

Render Config

16
Compute Units
-
-
-
-
1024
Shading Units
640
64
TMUs
40
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
64 KB (per SMM)
512 KB
L2 Cache
2 MB
-
-
-

Theoretical Performance

30.66 GPixel/s
Pixel Rate
14.98 GPixel/s
61.31 GTexel/s
Texture Rate
37.44 GTexel/s
-
-
-
1.962 TFLOPS
FP32 (float)
1198 GFLOPS
122.6 GFLOPS
FP64 (double)
37.44 GFLOPS

Board Design

80W
TDP
45W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-

Graphics Processor

Pitcairn
GPU Name
GM107
Pitcairn PRO (215-0828062)
GPU Variant
N15P-GT-A1
GCN 1.0
Architecture
Maxwell
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.8 billion
Transistors
1.87 billion
212 mm²
Die Size
148 mm²

Graphics Features

12 (11_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
1.2
OpenCL
3.0
1.2
Vulkan
1.3
-
CUDA
5.0
5.1
Shader Model
5.1

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