AMD Radeon HD 6390 vs AMD Radeon HD 6850 X2

VS

AMD Radeon HD 6390

AMD Radeon HD 6850 X2

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6390 and 2GB VRAM Radeon HD 6850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6390 's Advantages

Lower TDP (39W vs 254W)

AMD Radeon HD 6850 X2 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (134.4GB/s vs 16.00GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6390

0.352 TFLOPS

Radeon HD 6850 X2 +336%

1.536 TFLOPS

Radeon HD 6390

VS

Radeon HD 6850 X2

Graphics Card

Jul 2011

Release Date

Sep 2011

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

500 MHz

Memory Clock

1050 MHz

Memory

1024MB

Memory Size

2GB

DDR2

Memory Type

GDDR5

128bit

Memory Bus

256bit

16.00GB/s

Bandwidth

134.4GB/s

Render Config

4

Compute Units

12

-

320

Shading Units

960

16

TMUs

48

8

ROPs

32

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

4.400 GPixel/s

Pixel Rate

25.60 GPixel/s

8.800 GTexel/s

Texture Rate

38.40 GTexel/s

-

352.0 GFLOPS

FP32 (float)

1.536 TFLOPS

-

Board Design

39W

TDP

254W

200 W

Suggested PSU

600 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

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

None

Power Connectors

2x 8-pin

Graphics Processor

Redwood

GPU Name

Barts

Redwood LE

GPU Variant

Barts PRO (215-0798006)

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

0.627 billion

Transistors

1.7 billion

104 mm²

Die Size

255 mm²

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

5.0

Shader Model

5.0

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