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 R5 M255
CORE STATE
Topaz
VRAM
2 GB
CLOCK SPEED
940 MHz
TDP
—
BUS WIDTH
128 bit
ARCHITECTURE
GCN 3.0
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
Pro 555X
R5 M255
Core Specs
Shading Units
768
384
-50.0%
Shaders
768
384
-50.0%
TMUs
48
24
-50.0%
ROPs
16
8
-50.0%
Compute Units
12
6
-50.0%
Clocks
Base Clock
—
925 MHz
Boost Clock
—
940 MHz
GPU Clock
907 MHz
—
Memory Clock
1470 MHz
5.9 Gbps effective
1000 MHz
2 Gbps effective
Memory
Memory Size
4 GB
2 GB
VRAM (MB)
4,096
2,048
-50.0%
Memory Type
GDDR5
DDR3
Memory Bus
128 bit
128 bit
Bandwidth
94.08 GB/s
32.00 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
256 KB
Performance
Pixel Rate
14.51 GPixel/s
7.520 GPixel/s
Texture Rate
43.54 GTexel/s
22.56 GTexel/s
FP32 (TFLOPS)
1,393.2 GFLOPS
721.9 GFLOPS
FP64 (TFLOPS)
87.07 GFLOPS (1:16)
45.12 GFLOPS (1:16)
FP16 (TFLOPS)
1,393.2 GFLOPS (1:1)
721.9 GFLOPS (1:1)
Power
TDP
75 W
—
TDP (W)
75
—
Power Connectors
None
—
Architecture
Architecture
GCN 4.0
GCN 3.0
GPU Name
Polaris 21
Topaz
Generation
Radeon Pro Mac
(500X Series)
Gem System
(R5 M200)
Process Size
14 nm
28 nm
Transistors
3,000 million
1,550 million
Die Size
123 mm²
125 mm²
Foundry
GlobalFoundries
TSMC
Density
24.4M / mm²
12.4M / 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
—
Outputs
Portable Device Dependent
—
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x8
Other
Production
End-of-life
End-of-life
Predecessor
—
Solar System
Successor
—
Polaris Mobile