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AMD Radeon Pro 555X

Polaris 21
Graphics Processor
768
Cores
48
TMUs
16
ROPs
4096 MB
Memory Size
GDDR5
Memory Type
128 bit
Bus Width
AMD Polaris 21 Photo
The Radeon Pro 555X is a professional graphics card by AMD, launched in July 2018. Built on the 14 nm process, and based on the Polaris 21 graphics processor, in its Polaris 21 PRO variant, the card supports DirectX 12.0. The Polaris 21 graphics processor is an average sized chip with a die area of 123 mm² and 3,000 million transistors. Unlike the fully unlocked Radeon RX 560X, which uses the same GPU but has all 1024 shaders enabled, AMD has disabled some shading units on the Radeon Pro 555X to reach the product's target shader count. It features 768 shading units, 48 texture mapping units and 16 ROPs. AMD has placed 4,096 MB GDDR5 memory on the card, which are connected using a 128-bit memory interface. The GPU is operating at a frequency of 907 MHz, memory is running at 1275 MHz.
Being a igp card, the AMD Radeon Pro 555X does not require any additional power connector, its power draw is rated at 75 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it. Radeon Pro 555X is connected to the rest of the system using a PCI-Express 3.0 x8 interface.

Graphics Processor

GPU Name
Polaris 21
GPU Variant
Polaris 21 PRO
Architecture
GCN 4.0
Process Size
14 nm
Transistors
3,000 million
Die Size
123 mm²

Graphics Card

Release Date
Jul 16th, 2018
Generation
AMD Radeon Pro 500X
Production Status
Active
Bus Interface
PCIe 3.0 x8

Relative Performance

6%
8%
10%
12%
15%
15%
19%
25%
25%
28%
29%
30%
34%
36%
39%
40%
42%
43%
46%
49%
50%
51%
53%
60%
61%
62%
63%
63%
63%
64%
68%
71%
72%
75%
76%
76%
77%
77%
78%
79%
83%
84%
91%
92%
92%
96%
96%
100%
100%
Radeon Pro 555X
107%
110%
110%
112%
113%
117%
118%
119%
121%
127%
129%
131%
132%
132%
132%
143%
144%
148%
149%
150%
151%
152%
154%
155%
159%
171%
176%
180%
181%
183%
185%
189%
194%
199%
203%
206%
206%
229%
252%
255%
272%
274%
277%
281%
283%
285%
286%
289%
290%
294%
316%
320%
320%
324%
354%
362%
379%
392%
430%
445%
486%
486%
506%
592%
607%
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
907 MHz
Memory Clock
1275 MHz
5100 MHz effective

Memory

Memory Size
4096 MB
Memory Type
GDDR5
Memory Bus
128 bit
Bandwidth
81.60 GB/s

Render Config

Shading Units
768
TMUs
48
ROPs
16
Compute Units
12

Theoretical Performance

Pixel Rate
14.51 GPixel/s
Texture Rate
43.54 GTexel/s
FP16 (half) performance
1,393 GFLOPS (1:1)
FP32 (float) performance
1,393 GFLOPS
FP64 (double) performance
87.07 GFLOPS (1:16)

Board Design

Slot Width
IGP
TDP
75 W
Outputs
No outputs
Power Connectors
None

Graphics Features

DirectX
12.0 (12_0)
OpenGL
4.5
OpenCL
2.0
Vulkan
1.1.78
Shader Model
6.0

Polaris 21 GPU Notes

Chip Variant: Baffin / Polaris 11
Graphics/Compute: GFX8 (gfx803)
Display Core Engine: 11.2
Unified Video Decoder: 6.3
Video Compression Engine: 3.4
ROCm Support