AMD Radeon HD 7870 GHz Edition vs ATI Radeon HD 4870 X2

VS

AMD Radeon HD 7870 GHz Edition ATI Radeon HD 4870 X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition and 1024MB VRAM Radeon HD 4870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 GHz Edition 's Advantages

Released 3 years and 7 months late

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (153.6GB/s vs 115.2GB/s)

480 additional rendering cores

Lower TDP (175W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 GHz Edition +113%

2.56 TFLOPS

Radeon HD 4870 X2

1.2 TFLOPS

Radeon HD 7870 GHz Edition

VS

Radeon HD 4870 X2

Graphics Card

Mar 2012

Release Date

Aug 2008

Southern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1200 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

153.6GB/s

Bandwidth

115.2GB/s

Render Config

-

SM Count

-

20

Compute Units

10

1280

Shading Units

800

80

TMUs

40

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

12.00 GPixel/s

80.00 GTexel/s

Texture Rate

30.00 GTexel/s

-

FP16 (half)

-

2.560 TFLOPS

FP32 (float)

1200 GFLOPS

160.0 GFLOPS

FP64 (double)

240.0 GFLOPS

Graphics Processor

Pitcairn

GPU Name

R700

Pitcairn XT (215-0828047)

GPU Variant

R700 XT (215-0669045)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

2.8 billion

Transistors

0.956 billion

212 mm²

Die Size

256 mm²

Board Design

175W

TDP

286W

450 W

Suggested PSU

600 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

-

5.1

Shader Model

4.1

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