AMD Radeon HD 7970 GHz Edition vs AMD Radeon R9 270 1024SP

VS

AMD Radeon HD 7970 GHz Edition

AMD Radeon R9 270 1024SP

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 GHz Edition and 2GB VRAM Radeon R9 270 1024SP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 GHz Edition 's Advantages

Boost Clock has increased by 14% (1050MHz vs 925MHz)

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 153.6GB/s)

1024 additional rendering cores

AMD Radeon R9 270 1024SP 's Advantages

Released 2 years and 9 months late

Lower TDP (150W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 GHz Edition +127%

4.301 TFLOPS

Radeon R9 270 1024SP

1.894 TFLOPS

Radeon HD 7970 GHz Edition

VS

Radeon R9 270 1024SP

Graphics Card

Jun 2012

Release Date

Mar 2015

Southern Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1000 MHz

Base Clock

900 MHz

1050 MHz

Boost Clock

925 MHz

1500 MHz

Memory Clock

1200 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

288.0GB/s

Bandwidth

153.6GB/s

Render Config

32

Compute Units

16

-

2048

Shading Units

1024

128

TMUs

64

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

33.60 GPixel/s

Pixel Rate

29.60 GPixel/s

134.4 GTexel/s

Texture Rate

59.20 GTexel/s

-

4.301 TFLOPS

FP32 (float)

1.894 TFLOPS

1075 GFLOPS

FP64 (double)

118.4 GFLOPS

Board Design

300W

TDP

150W

700 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

Pitcairn

Tahiti XT2 (215-0821065)

GPU Variant

Pitcairn PRO (215-0828062)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

2.8 billion

352 mm²

Die Size

212 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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