AMD Radeon 550X 640SP vs AMD Radeon HD 7950 Mac Edition

VS

AMD Radeon 550X 640SP AMD Radeon HD 7950 Mac Edition

We compared two Desktop platform GPUs: 4GB VRAM Radeon 550X 640SP and 3GB VRAM Radeon HD 7950 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon 550X 640SP 's Advantages

Released 5 years and 1 months late

Boost Clock1071MHz

More VRAM (4GB vs 3GB)

Lower TDP (50W vs 200W)

AMD Radeon HD 7950 Mac Edition 's Advantages

Larger VRAM bandwidth (240.0GB/s vs 48.00GB/s)

1152 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon 550X 640SP

1.371 TFLOPS

Radeon HD 7950 Mac Edition +109%

2.867 TFLOPS

Radeon 550X 640SP

VS

Radeon HD 7950 Mac Edition

Graphics Card

Apr 2018

Release Date

Mar 2013

Polaris

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1019 MHz

Base Clock

-

1071 MHz

Boost Clock

-

1500 MHz

Memory Clock

1250 MHz

Memory

4GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

384bit

48.00GB/s

Bandwidth

240.0GB/s

Render Config

-

SM Count

-

10

Compute Units

28

640

Shading Units

1792

40

TMUs

112

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

Theoretical Performance

17.14 GPixel/s

Pixel Rate

25.60 GPixel/s

42.84 GTexel/s

Texture Rate

89.60 GTexel/s

1371 GFLOPS

FP16 (half)

-

1371 GFLOPS

FP32 (float)

2.867 TFLOPS

85.68 GFLOPS

FP64 (double)

716.8 GFLOPS

Graphics Processor

Lexa

GPU Name

Tahiti

Lexa PRO (215-0904018)

GPU Variant

Tahiti PRO (215-0821056)

GCN 4.0

Architecture

GCN 1.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

4.313 billion

103 mm²

Die Size

352 mm²

Board Design

50W

TDP

200W

250 W

Suggested PSU

550 W

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

Outputs

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

None

Power Connectors

2x 6-pin

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

Vulkan

1.2

-

CUDA

-

6.4

Shader Model

5.1

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