AMD Radeon HD 7870 XT vs AMD Radeon RX 580

VS

AMD Radeon HD 7870 XT

AMD Radeon RX 580

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 8GB VRAM Radeon RX 580 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 580 's Advantages

Released 4 years and 5 months late

Boost Clock has increased by 37% (1340MHz vs 975MHz)

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (256.0GB/s vs 192.0GB/s)

768 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT

2.995 TFLOPS

Radeon RX 580 +106%

6.175 TFLOPS

Radeon HD 7870 XT

VS

Radeon RX 580

Graphics Card

Nov 2012

Release Date

Apr 2017

Southern Islands

Generation

Polaris

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

925 MHz

Base Clock

1257 MHz

975 MHz

Boost Clock

1340 MHz

1500 MHz

Memory Clock

2000 MHz

Memory

2GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

192.0GB/s

Bandwidth

256.0GB/s

Render Config

24

Compute Units

36

-

1536

Shading Units

2304

96

TMUs

144

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

2 MB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

42.88 GPixel/s

93.60 GTexel/s

Texture Rate

193.0 GTexel/s

-

FP16 (half)

6.175 TFLOPS

2.995 TFLOPS

FP32 (float)

6.175 TFLOPS

748.8 GFLOPS

FP64 (double)

385.9 GFLOPS

Board Design

185W

TDP

185W

450 W

Suggested PSU

450 W

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

Outputs

1x HDMI 2.0b 3x DisplayPort 1.4a

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Tahiti

GPU Name

Polaris 20

Tahiti LE (215-0821122)

GPU Variant

Polaris 20 XTX (215-0910038)

GCN 1.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

4.313 billion

Transistors

5.7 billion

352 mm²

Die Size

232 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.2

-

5.1

Shader Model

6.4

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