Radeon R9 M395X Mac Edition vs Radeon HD 8870M
We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M395X Mac Edition and 2GB VRAM Radeon HD 8870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 M395X Mac Edition 's Advantages
Released 2 years and 1 months late
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (174.7GB/s vs 72.00GB/s)
1408 additional rendering cores
Radeon HD 8870M 's Advantages
Boost Clock775MHz
Score
Benchmark
FP32 (float)
Radeon R9 M395X Mac Edition
+275%
3723
Radeon HD 8870M
992
Graphics Card
May 2015
Release Date
Apr 2013
Crystal System
Generation
Solar System
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
725 MHz
-
Boost Clock
775 MHz
1365 MHz
Memory Clock
1125 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
174.7GB/s
Bandwidth
72.00GB/s
Render Config
32
Compute Units
10
2048
Shading Units
640
128
TMUs
40
32
ROPs
16
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
256 KB
Theoretical Performance
29.09 GPixel/s
Pixel Rate
12.40 GPixel/s
116.4 GTexel/s
Texture Rate
31.00 GTexel/s
3.723 TFLOPS
FP16 (half)
-
3.723 TFLOPS
FP32 (float)
992.0 GFLOPS
232.7 GFLOPS
FP64 (double)
62.00 GFLOPS
Board Design
250W
TDP
Unknown
No outputs
Outputs
Portable Device Dependent
None
Power Connectors
-
Graphics Processor
Amethyst
GPU Name
Venus
Amethyst XT
GPU Variant
Venus XT
(216-0846000)
GCN 3.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5 billion
Transistors
1.5 billion
366 mm²
Die Size
123 mm²
Graphics Features
12 (12_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.0
OpenCL
2.1 (1.2)
1.2
Vulkan
1.2.170
6.3
Shader Model
6.5 (5.1)
