AMD Radeon R9 285X vs AMD Radeon HD 6850

VS

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 285X and 1024MB VRAM Radeon HD 6850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 285X 's Advantages

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (264.0GB/s vs 128.0GB/s)

1088 additional rendering cores

AMD Radeon HD 6850 's Advantages

Lower TDP (127W vs 200W)

Score

Benchmark

FP32 (float)

Radeon R9 285X +175%

4.104 TFLOPS

Radeon HD 6850

1.488 TFLOPS

Radeon R9 285X

VS

Radeon HD 6850

Graphics Card

Unknown

Release Date

Oct 2010

Volcanic Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1375 MHz

Memory Clock

1000 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

128.0GB/s

Render Config

-

SM Count

-

32

Compute Units

12

2048

Shading Units

960

128

TMUs

48

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

Theoretical Performance

32.06 GPixel/s

Pixel Rate

24.80 GPixel/s

128.3 GTexel/s

Texture Rate

37.20 GTexel/s

-

FP16 (half)

-

4.104 TFLOPS

FP32 (float)

1488 GFLOPS

-

FP64 (double)

-

Graphics Processor

Tonga

GPU Name

Barts

Tonga XT (215-0851313)

GPU Variant

Barts PRO (215-0798006)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

1.7 billion

366 mm²

Die Size

255 mm²

Board Design

200W

TDP

127W

550 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

CUDA

-

6.3

Shader Model

5.0

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