AMD Radeon HD 7870 XT vs AMD Radeon 550X 640SP

VS

AMD Radeon HD 7870 XT

AMD Radeon 550X 640SP

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 4GB VRAM Radeon 550X 640SP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 XT 's Advantages

Larger VRAM bandwidth (192.0GB/s vs 48.00GB/s)

896 additional rendering cores

AMD Radeon 550X 640SP 's Advantages

Released 5 years and 5 months late

Boost Clock has increased by 10% (1071MHz vs 975MHz)

More VRAM (4GB vs 2GB)

Lower TDP (50W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +118%

2.995 TFLOPS

Radeon 550X 640SP

1.371 TFLOPS

Radeon HD 7870 XT

VS

Radeon 550X 640SP

Graphics Card

Nov 2012

Release Date

Apr 2018

Southern Islands

Generation

Polaris

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

925 MHz

Base Clock

1019 MHz

975 MHz

Boost Clock

1071 MHz

1500 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

192.0GB/s

Bandwidth

48.00GB/s

Render Config

24

Compute Units

10

-

1536

Shading Units

640

96

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

17.14 GPixel/s

93.60 GTexel/s

Texture Rate

42.84 GTexel/s

-

FP16 (half)

1371 GFLOPS

2.995 TFLOPS

FP32 (float)

1371 GFLOPS

748.8 GFLOPS

FP64 (double)

85.68 GFLOPS

Board Design

185W

TDP

50W

450 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 2.0b 1x DisplayPort 1.4a

2x 6-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

Lexa

Tahiti LE (215-0821122)

GPU Variant

Lexa PRO (215-0904018)

GCN 1.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

4.313 billion

Transistors

2.2 billion

352 mm²

Die Size

103 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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