XFX R9 285 Double Dissipation

R9-285A-CDFC

Graphics Processor

Tonga

Cores

1792

TMUs

112

ROPs

Memory Size

2 GB

Memory Type

GDDR5

Bus Width

256 bit

GPU

Graphics Processor

GPU Name: Tonga

GPU Variant: Tonga PRO
(215-0851128)

Architecture: GCN 3.0

Foundry: TSMC

Process Size: 28 nm

Transistors: 5,000 million

Density: 13.7M / mm²

Die Size: 366 mm²

Graphics Card

Release Date: Sep 2nd, 2014

Generation: Volcanic Islands
(R9 200)

Predecessor: Sea Islands

Successor: Pirate Islands

Production: End-of-life

Bus Interface: PCIe 3.0 x16

Clock Speeds

GPU Clock: 918 MHz

Memory Clock: 1375 MHz
5.5 Gbps effective

Memory

Memory Size: 2 GB

Memory Type: GDDR5

Memory Bus: 256 bit

Bandwidth: 176.0 GB/s

Render Config

Shading Units: 1792

TMUs: 112

ROPs: 32

Compute Units: 28

L1 Cache: 16 KB (per CU)

L2 Cache: 512 KB

Theoretical Performance

Pixel Rate: 29.38 GPixel/s

Texture Rate: 102.8 GTexel/s

FP16 (half): 3.290 TFLOPS (1:1)

FP32 (float): 3.290 TFLOPS

FP64 (double): 205.6 GFLOPS (1:16)

Board Design

Slot Width: Dual-slot

TDP: 190 W

Suggested PSU: 450 W

Outputs: 2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2

Power Connectors: ~~2x 6-pin~~
1x 6-pin + 1x 8-pin

Board Number: C766

Graphics Features

DirectX: 12 (12_0)

OpenGL: 4.6

OpenCL: 2.1

Vulkan: 1.2.170

Shader Model: 6.5

Tonga GPU Notes

Generation: Volcanic Islands
Desktop Variant: Antigua
Mobile Variant: Amethyst
Graphics/Compute: GFX8 (gfx802 / gfx805)
Display Core Engine: 10.0
Unified Video Decoder: 5.0
Video Compression Engine: 3.0
System DMA: 3.0.0
CLRX: GCN 1.2.0

Other retail boards based on this design (14)

Name	GPU Clock	Memory Clock	Other Changes
ASUS Strix R9 285 OC	954 MHz	1375 MHz	269 mm/10.6 inches
Club 3D R9 285 royalQueen	945 MHz	1375 MHz	225 mm/8.9 inches
GIGABYTE R9 285 WindForce 2X OC	973 MHz	1375 MHz
HIS R9 285 IceQ X2 OC	938 MHz	1375 MHz	270 mm/10.6 inches
HIS R9 285 Mini IceQ X2 OC	938 MHz	1375 MHz	210 mm/8.3 inches
MSI R9 285 Gaming OC	973 MHz	1375 MHz	263 mm/10.4 inches
PowerColor TurboDuo R9 285 OC	945 MHz	1375 MHz	207 mm/8.1 inches
Sapphire Dual-X R9 285	918 MHz	1375 MHz	264 mm/10.4 inches
Sapphire Dual-X R9 285 OC	965 MHz	1400 MHz	264 mm/10.4 inches
Sapphire R9 285 ITX Compact	918 MHz	1375 MHz	171 mm/6.7 inches, 1x DVI 1x HDMI 2x mini-DisplayPort
Sapphire R9 285 ITX Compact OC	928 MHz	1375 MHz	171 mm/6.7 inches, 1x DVI 1x HDMI 2x mini-DisplayPort
VTX3D R9 285 X-Edition	945 MHz	1375 MHz	207 mm/8.1 inches
XFX R9 285 Black Edition	975 MHz	1375 MHz
XFX R9 285 Double Dissipation	918 MHz	1375 MHz