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AMD Radeon R9 M485X

Amethyst
Graphics Processor
2048
Cores
128
TMUs
32
ROPs
8 GB
Memory Size
GDDR5
Memory Type
256 bit
Bus Width
AMD Amethyst Photo
The Radeon R9 M485X is a graphics card by AMD, launched in May 2016. Built on the 28 nm process, and based on the Amethyst graphics processor, in its Amethyst XT variant, the card supports DirectX 12.0. The Amethyst graphics processor is a large chip with a die area of 366 mm² and 5,000 million transistors. It features 2048 shading units, 128 texture mapping units and 32 ROPs. AMD has placed 8,192 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 723 MHz, memory is running at 1250 MHz.
Being a mxm module card, the AMD Radeon R9 M485X does not require any additional power connector, its power draw is rated at 250 W maximum. This device has no display connectivity, as it is not designed to have monitors connected to it.

Graphics Processor

GPU Name
Amethyst
GPU Variant
Amethyst XT
Architecture
GCN 3.0
Foundry
TSMC
Process Size
28 nm
Transistors
5,000 million
Die Size
366 mm²

Graphics Card

Release Date
May 15th, 2016
Generation
Crystal System
(R9 M400)
Production
Active
Bus Interface
MXM-B (3.0)

Relative Performance

4%
5%
6%
8%
10%
10%
12%
16%
17%
18%
19%
19%
22%
24%
25%
26%
27%
28%
30%
32%
32%
33%
34%
39%
40%
40%
41%
41%
41%
42%
44%
46%
47%
49%
49%
50%
50%
50%
51%
52%
54%
55%
59%
60%
60%
63%
63%
65%
69%
72%
72%
73%
74%
76%
77%
78%
79%
83%
84%
86%
86%
86%
86%
93%
94%
96%
97%
98%
99%
99%
100%
Radeon R9 M485X
101%
101%
104%
112%
114%
117%
118%
119%
121%
123%
127%
129%
133%
134%
135%
149%
164%
166%
177%
178%
181%
183%
185%
186%
188%
189%
190%
192%
202%
206%
209%
209%
230%
234%
237%
255%
280%
290%
313%
313%
330%
368%
386%
396%
431%
491%
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
723 MHz
Memory Clock
1250 MHz
5000 MHz effective

Memory

Memory Size
8 GB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
160.0 GB/s

Render Config

Shading Units
2048
TMUs
128
ROPs
32
Compute Units
32

Theoretical Performance

Pixel Rate
23.14 GPixel/s
Texture Rate
92.54 GTexel/s
FP16 (half) performance
2,961 GFLOPS (1:1)
FP32 (float) performance
2,961 GFLOPS
FP64 (double) performance
185.1 GFLOPS (1:16)

Board Design

Slot Width
MXM Module
TDP
250 W
Outputs
No outputs
Power Connectors
None

Graphics Features

DirectX
12.0 (12_0)
OpenGL
4.5
OpenCL
2.0
Vulkan
1.1.82
Shader Model
6.0

Amethyst GPU Notes

Chip Variant: Tonga
Graphics/Compute: GFX8 (gfx802)
Display Core Engine: 10.0
Unified Video Decoder: 5.0
Video Compression Engine: 3.0
ROCm Support