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AMD Radeon R9 285X

Tonga
Graphics Processor
2048
Cores
128
TMUs
32
ROPs
3072 MB
Memory Size
GDDR5
Memory Type
384 bit
Bus Width
AMD Radeon R9 285X Photo AMD Tonga Photo
The Radeon R9 285X was a graphics card by AMD, launched in August 2014. Built on the 28 nm process, and based on the Tonga graphics processor, in its Tonga XT variant, the card supports DirectX 12.0. The Tonga 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 3,072 MB GDDR5 memory on the card, which are connected using a 384-bit memory interface. The GPU is operating at a frequency of 1002 MHz, memory is running at 1375 MHz.
Being a dual-slot card, the AMD Radeon R9 285X draws power from 1x 6-pin + 1x 8-pin power connectors, with power draw rated at 200 W maximum. Display outputs include: 2x DVI, 1x HDMI, 1x DisplayPort. Radeon R9 285X is connected to the rest of the system using a PCI-Express 3.0 x16 interface. The card measures 267 mm in length, and features a dual-slot cooling solution.

Graphics Processor

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

Graphics Card

Release Date
Never Released
Generation
AMD Volcanic Islands R9 200
Production Status
End-of-life
Bus Interface
PCIe 3.0 x16

Relative Performance

3%
4%
5%
6%
7%
7%
9%
12%
12%
13%
14%
14%
16%
17%
18%
19%
20%
20%
22%
23%
23%
24%
25%
28%
29%
29%
29%
30%
30%
30%
32%
34%
34%
35%
36%
36%
36%
36%
36%
37%
39%
40%
43%
43%
43%
45%
45%
47%
50%
52%
52%
53%
53%
55%
56%
56%
57%
60%
61%
62%
62%
62%
62%
67%
68%
69%
70%
71%
71%
71%
73%
73%
75%
81%
83%
85%
85%
86%
87%
89%
91%
93%
96%
97%
97%
100%
Radeon R9 285X
108%
118%
120%
128%
129%
130%
132%
133%
134%
134%
136%
136%
138%
149%
151%
151%
152%
167%
170%
178%
184%
202%
209%
228%
228%
238%
278%
286%
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
1002 MHz
Memory Clock
1375 MHz
5500 MHz effective

Memory

Memory Size
3072 MB
Memory Type
GDDR5
Memory Bus
384 bit
Bandwidth
264.0 GB/s

Render Config

Shading Units
2048
TMUs
128
ROPs
32
Compute Units
32

Theoretical Performance

Pixel Rate
32.06 GPixel/s
Texture Rate
128.3 GTexel/s
FP32 (float) performance
4,104 GFLOPS

Board Design

Slot Width
Dual-slot
Length
10.5 inches
267 mm
TDP
200 W
Outputs
2x DVI
1x HDMI
1x DisplayPort
Power Connectors
1x 6-pin + 1x 8-pin
Board Number
C765

Graphics Features

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

Tonga GPU Notes

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