AMD Radeon HD 6870 X2 vs AMD Radeon R9 Nano

VS

AMD Radeon HD 6870 X2

AMD Radeon R9 Nano

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 4GB VRAM Radeon R9 Nano to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 Nano 's Advantages

Released 4 years and 1 months late

More VRAM (4GB vs 1024GB)

Larger VRAM bandwidth (512.0GB/s vs 134.4GB/s)

2976 additional rendering cores

Lower TDP (175W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2

2.016 TFLOPS

Radeon R9 Nano +306%

8.192 TFLOPS

Radeon HD 6870 X2

VS

Radeon R9 Nano

Graphics Card

Jul 2011

Release Date

Aug 2015

Northern Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

500 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

HBM

256bit

Memory Bus

4096bit

134.4GB/s

Bandwidth

512.0GB/s

Render Config

14

Compute Units

64

-

1120

Shading Units

4096

56

TMUs

256

32

ROPs

64

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

2 MB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

64.00 GPixel/s

50.40 GTexel/s

Texture Rate

256.0 GTexel/s

-

FP16 (half)

8.192 TFLOPS

2.016 TFLOPS

FP32 (float)

8.192 TFLOPS

-

FP64 (double)

512.0 GFLOPS

Board Design

300W

TDP

175W

700 W

Suggested PSU

450 W

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

Outputs

1x HDMI 1.4a 3x DisplayPort 1.2

-

Power Connectors

1x 8-pin

Graphics Processor

Barts

GPU Name

Fiji

Barts XT (215-0798000)

GPU Variant

Fiji XT CA (215-0862120)

TeraScale 2

Architecture

GCN 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

8.9 billion

255 mm²

Die Size

596 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.0

N/A

Vulkan

1.2

-

5.0

Shader Model

6.3

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