AMD Radeon HD 7870 XT vs AMD Radeon R9 Nano

VS

AMD Radeon HD 7870 XT

AMD Radeon R9 Nano

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT 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 HD 7870 XT 's Advantages

Boost Clock975MHz

AMD Radeon R9 Nano 's Advantages

Released 2 years and 9 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (512.0GB/s vs 192.0GB/s)

2560 additional rendering cores

Lower TDP (175W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT

2.995 TFLOPS

Radeon R9 Nano +173%

8.192 TFLOPS

Radeon HD 7870 XT

VS

Radeon R9 Nano

Graphics Card

Nov 2012

Release Date

Aug 2015

Southern Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

925 MHz

Base Clock

-

975 MHz

Boost Clock

-

1500 MHz

Memory Clock

500 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

HBM

256bit

Memory Bus

4096bit

192.0GB/s

Bandwidth

512.0GB/s

Render Config

24

Compute Units

64

-

1536

Shading Units

4096

96

TMUs

256

32

ROPs

64

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

2 MB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

64.00 GPixel/s

93.60 GTexel/s

Texture Rate

256.0 GTexel/s

-

FP16 (half)

8.192 TFLOPS

2.995 TFLOPS

FP32 (float)

8.192 TFLOPS

748.8 GFLOPS

FP64 (double)

512.0 GFLOPS

Board Design

185W

TDP

175W

450 W

Suggested PSU

450 W

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

Outputs

1x HDMI 1.4a 3x DisplayPort 1.2

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Tahiti

GPU Name

Fiji

Tahiti LE (215-0821122)

GPU Variant

Fiji XT CA (215-0862120)

GCN 1.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

8.9 billion

352 mm²

Die Size

596 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

5.1

Shader Model

6.3

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