AMD Radeon HD 7970 vs AMD Radeon 550X 640SP

VS

AMD Radeon HD 7970 AMD Radeon 550X 640SP

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 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 7970 's Advantages

Larger VRAM bandwidth (264.0GB/s vs 48.00GB/s)

1408 additional rendering cores

AMD Radeon 550X 640SP 's Advantages

Released 6 years and 4 months late

Boost Clock1071MHz

More VRAM (4GB vs 3GB)

Lower TDP (50W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 +176%

3.789 TFLOPS

Radeon 550X 640SP

1.371 TFLOPS

Radeon HD 7970

VS

Radeon 550X 640SP

Graphics Card

Dec 2011

Release Date

Apr 2018

Southern Islands

Generation

Polaris

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1019 MHz

-

Boost Clock

1071 MHz

1375 MHz

Memory Clock

1500 MHz

Memory

3GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

64bit

264.0GB/s

Bandwidth

48.00GB/s

Render Config

-

SM Count

-

32

Compute Units

10

2048

Shading Units

640

128

TMUs

40

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

Theoretical Performance

29.60 GPixel/s

Pixel Rate

17.14 GPixel/s

118.4 GTexel/s

Texture Rate

42.84 GTexel/s

-

FP16 (half)

1371 GFLOPS

3.789 TFLOPS

FP32 (float)

1371 GFLOPS

947.2 GFLOPS

FP64 (double)

85.68 GFLOPS

Graphics Processor

Tahiti

GPU Name

Lexa

Tahiti XT (215-0821060)

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

Board Design

250W

TDP

50W

600 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

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

6.4

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