AMD Radeon HD 6850 X2 vs AMD Radeon RX 580X

VS

AMD Radeon HD 6850 X2 AMD Radeon RX 580X

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6850 X2 and 8GB VRAM Radeon RX 580X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 580X 's Advantages

Released 6 years and 7 months late

Boost Clock1340MHz

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (256.0GB/s vs 134.4GB/s)

1344 additional rendering cores

Lower TDP (185W vs 254W)

Score

Benchmark

FP32 (float)

Radeon HD 6850 X2

1.536 TFLOPS

Radeon RX 580X +302%

6.175 TFLOPS

Radeon HD 6850 X2

VS

Radeon RX 580X

Graphics Card

Sep 2011

Release Date

Apr 2018

Northern Islands

Generation

Polaris

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1257 MHz

-

Boost Clock

1340 MHz

1050 MHz

Memory Clock

2000 MHz

Memory

2GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

256.0GB/s

Render Config

-

SM Count

-

12

Compute Units

36

960

Shading Units

2304

48

TMUs

144

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

2 MB

Theoretical Performance

25.60 GPixel/s

Pixel Rate

42.88 GPixel/s

38.40 GTexel/s

Texture Rate

193.0 GTexel/s

-

FP16 (half)

6.175 TFLOPS

1.536 TFLOPS

FP32 (float)

6.175 TFLOPS

-

FP64 (double)

385.9 GFLOPS

Graphics Processor

Barts

GPU Name

Polaris 20

Barts PRO (215-0798006)

GPU Variant

Polaris 20 XTX (215-0910038)

TeraScale 2

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

40 nm

Process Size

14 nm

1.7 billion

Transistors

5.7 billion

255 mm²

Die Size

232 mm²

Board Design

254W

TDP

185W

600 W

Suggested PSU

450 W

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

Outputs

1x HDMI 2.0b 3x DisplayPort 1.4a

2x 8-pin

Power Connectors

1x 8-pin

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.1

N/A

Vulkan

1.2

-

CUDA

-

5.0

Shader Model

6.4

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