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 RX 550X
CORE STATE
Lexa
VRAM
4 GB
CLOCK SPEED
1183 MHz
TDP
50 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2018
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
Pro 555X
RX 550X
Core Specs
Shading Units
768
512
-33.3%
Shaders
768
512
-33.3%
TMUs
48
32
-33.3%
ROPs
16
16
0.0%
Compute Units
12
8
-33.3%
Clocks
Base Clock
—
1100 MHz
Boost Clock
—
1183 MHz
GPU Clock
907 MHz
—
Memory Clock
1470 MHz
5.9 Gbps effective
1500 MHz
6 Gbps effective
Memory
Memory Size
4 GB
4 GB
VRAM (MB)
4,096
4,096
0.0%
Memory Type
GDDR5
GDDR5
Memory Bus
128 bit
128 bit
Bandwidth
94.08 GB/s
96.00 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
18.93 GPixel/s
Texture Rate
43.54 GTexel/s
37.86 GTexel/s
FP32 (TFLOPS)
1,393.2 GFLOPS
1,211.4 GFLOPS
FP64 (TFLOPS)
87.07 GFLOPS (1:16)
75.71 GFLOPS (1:16)
FP16 (TFLOPS)
1,393.2 GFLOPS (1:1)
1,211.4 GFLOPS (1:1)
Power
TDP
75 W
50 W
TDP (W)
75
50
-33.3%
Suggested PSU
—
250 W
Power Connectors
None
None
Architecture
Architecture
GCN 4.0
GCN 4.0
GPU Name
Polaris 21
Lexa
Generation
Radeon Pro Mac
(500X Series)
Polaris
(RX 500X)
Process Size
14 nm
14 nm
Transistors
3,000 million
2,200 million
Die Size
123 mm²
103 mm²
Foundry
GlobalFoundries
GlobalFoundries
Density
24.4M / mm²
21.4M / mm²
API Support
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
Vulkan
1.3
1.3
OpenCL
2.1
2.1
Shader Model
6.7
6.7
Physical
Slot Width
IGP
Dual-slot
Length
—
145 mm
5.7 inches
Outputs
Portable Device Dependent
1x DVI1x HDMI 2.0b1x DisplayPort 1.4a
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x8
Other
Production
End-of-life
End-of-life
Predecessor
—
Polaris
Successor
—
Vega