AMD Radeon HD 7870 XT vs AMD Radeon HD 7970 GHz Edition

VS

AMD Radeon HD 7870 XT

AMD Radeon HD 7970 GHz Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 3GB VRAM Radeon HD 7970 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 XT 's Advantages

Lower TDP (185W vs 300W)

AMD Radeon HD 7970 GHz Edition 's Advantages

Boost Clock has increased by 8% (1050MHz vs 975MHz)

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 192.0GB/s)

512 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT

2.995 TFLOPS

Radeon HD 7970 GHz Edition +43%

4.301 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 7970 GHz Edition

Graphics Card

Nov 2012

Release Date

Jun 2012

Southern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

925 MHz

Base Clock

1000 MHz

975 MHz

Boost Clock

1050 MHz

1500 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

192.0GB/s

Bandwidth

288.0GB/s

Render Config

24

Compute Units

32

-

1536

Shading Units

2048

96

TMUs

128

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

33.60 GPixel/s

93.60 GTexel/s

Texture Rate

134.4 GTexel/s

-

2.995 TFLOPS

FP32 (float)

4.301 TFLOPS

748.8 GFLOPS

FP64 (double)

1075 GFLOPS

Board Design

185W

TDP

300W

450 W

Suggested PSU

700 W

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

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Tahiti

GPU Name

Tahiti

Tahiti LE (215-0821122)

GPU Variant

Tahiti XT2 (215-0821065)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

4.313 billion

352 mm²

Die Size

352 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

5.1

Shader Model

5.1

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