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

VS

AMD Radeon HD 7870 XT

AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 2GB VRAM Radeon HD 7870 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

Released 8 months late

Boost Clock975MHz

Larger VRAM bandwidth (192.0GB/s vs 153.6GB/s)

256 additional rendering cores

AMD Radeon HD 7870 GHz Edition 's Advantages

Lower TDP (175W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +16%

2.995 TFLOPS

Radeon HD 7870 GHz Edition

2.56 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 7870 GHz Edition

Graphics Card

Nov 2012

Release Date

Mar 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

-

975 MHz

Boost Clock

-

1500 MHz

Memory Clock

1200 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

192.0GB/s

Bandwidth

153.6GB/s

Render Config

24

Compute Units

20

-

1536

Shading Units

1280

96

TMUs

80

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

32.00 GPixel/s

93.60 GTexel/s

Texture Rate

80.00 GTexel/s

-

2.995 TFLOPS

FP32 (float)

2.560 TFLOPS

748.8 GFLOPS

FP64 (double)

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

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

Tahiti

GPU Name

Pitcairn

Tahiti LE (215-0821122)

GPU Variant

Pitcairn XT (215-0828047)

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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