GPU Comparison
RADEON
AMD Radeon Pro 555X
CORE STATE
Polaris 21
VRAM
4 GB
CLOCK SPEED
—
TDP
75 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2018
VS
RADEON
Radeon R9 M395X
CORE STATE
Amethyst
VRAM
8 GB
CLOCK SPEED
—
TDP
75 W
BUS WIDTH
256 bit
ARCHITECTURE
GCN 3.0
PROCESS
28 nm
LAUNCH DATE
2015
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
Pro 555X
R9 M395X
Core Specs
Shading Units
768
2,048
+166.7%
Shaders
768
2,048
+166.7%
TMUs
48
128
+166.7%
ROPs
16
32
+100.0%
Compute Units
12
32
+166.7%
Clocks
GPU Clock
907 MHz
723 MHz
Memory Clock
1470 MHz
5.9 Gbps effective
1250 MHz
5 Gbps effective
Memory
Memory Size
4 GB
8 GB
VRAM (MB)
4,096
8,192
+100.0%
Memory Type
GDDR5
GDDR5
Memory Bus
128 bit
256 bit
Bandwidth
94.08 GB/s
160.0 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
512 KB
Performance
Pixel Rate
14.51 GPixel/s
23.14 GPixel/s
Texture Rate
43.54 GTexel/s
92.54 GTexel/s
FP32 (TFLOPS)
1,393.2 GFLOPS
2.961 TFLOPS
FP64 (TFLOPS)
87.07 GFLOPS (1:16)
185.1 GFLOPS (1:16)
FP16 (TFLOPS)
1,393.2 GFLOPS (1:1)
2.961 TFLOPS (1:1)
Power
TDP
75 W
75 W
TDP (W)
75
75
0.0%
Power Connectors
None
None
Architecture
Architecture
GCN 4.0
GCN 3.0
GPU Name
Polaris 21
Amethyst
Generation
Radeon Pro Mac
(500X Series)
Gem System
(R9 M300)
Process Size
14 nm
28 nm
Transistors
3,000 million
5,000 million
Die Size
123 mm²
366 mm²
Foundry
GlobalFoundries
TSMC
Density
24.4M / mm²
13.7M / mm²
API Support
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
Vulkan
1.3
1.2.170
OpenCL
2.1
2.1
Shader Model
6.7
6.5
Physical
Slot Width
IGP
MXM Module
Outputs
Portable Device Dependent
Portable Device Dependent
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
—
Solar System
Successor
—
Polaris Mobile