AMD Radeon R9 280X vs AMD Radeon HD 7870 GHz Edition

VS

AMD Radeon R9 280X AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X 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 R9 280X 's Advantages

Released 1 years and 7 months late

Boost Clock1000MHz

More VRAM (3GB vs 2GB)

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

768 additional rendering cores

AMD Radeon HD 7870 GHz Edition 's Advantages

Lower TDP (175W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 280X +60%

4.096 TFLOPS

Radeon HD 7870 GHz Edition

2.56 TFLOPS

Radeon R9 280X

VS

Radeon HD 7870 GHz Edition

Graphics Card

Oct 2013

Release Date

Mar 2012

Volcanic Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

850 MHz

Base Clock

-

1000 MHz

Boost Clock

-

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

-

SM Count

-

32

Compute Units

20

2048

Shading Units

1280

128

TMUs

80

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

512 KB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

32.00 GPixel/s

128.0 GTexel/s

Texture Rate

80.00 GTexel/s

-

FP16 (half)

-

4.096 TFLOPS

FP32 (float)

2.560 TFLOPS

1024 GFLOPS

FP64 (double)

160.0 GFLOPS

Graphics Processor

Tahiti

GPU Name

Pitcairn

Tahiti XTL (215-0821065)

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

Board Design

250W

TDP

175W

600 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

5.1

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