AMD Radeon R9 390 X2 vs AMD Radeon HD 6850 X2

VS

AMD Radeon R9 390 X2

AMD Radeon HD 6850 X2

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 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 R9 390 X2 's Advantages

Released 4 years late

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (345.6GB/s vs 134.4GB/s)

1600 additional rendering cores

AMD Radeon HD 6850 X2 's Advantages

Lower TDP (254W vs 580W)

Score

Benchmark

FP32 (float)

Radeon R9 390 X2 +233%

5.12 TFLOPS

Radeon HD 6850 X2

1.536 TFLOPS

Radeon R9 390 X2

VS

Radeon HD 6850 X2

Graphics Card

Sep 2015

Release Date

Sep 2011

Pirate Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1350 MHz

Memory Clock

1050 MHz

Memory

8GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

256bit

345.6GB/s

Bandwidth

134.4GB/s

Render Config

40

Compute Units

12

-

2560

Shading Units

960

160

TMUs

48

64

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

64.00 GPixel/s

Pixel Rate

25.60 GPixel/s

160.0 GTexel/s

Texture Rate

38.40 GTexel/s

-

5.120 TFLOPS

FP32 (float)

1.536 TFLOPS

640.0 GFLOPS

FP64 (double)

-

Board Design

580W

TDP

254W

950 W

Suggested PSU

600 W

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

Outputs

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

4x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Grenada

GPU Name

Barts

Grenada PRO (215-0880030)

GPU Variant

Barts PRO (215-0798006)

GCN 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

6.2 billion

Transistors

1.7 billion

438 mm²

Die Size

255 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

6.3

Shader Model

5.0

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