AMD Radeon Sky 900 vs AMD Radeon 550X 640SP

VS

AMD Radeon Sky 900

AMD Radeon 550X 640SP

We compared two Desktop platform GPUs: 3GB VRAM Radeon Sky 900 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 Sky 900 's Advantages

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

1152 additional rendering cores

AMD Radeon 550X 640SP 's Advantages

Released 5 years and 1 months late

Boost Clock has increased by 13% (1071MHz vs 950MHz)

More VRAM (4GB vs 3GB)

Lower TDP (50W vs 300W)

Score

Benchmark

FP32 (float)

Radeon Sky 900 +148%

3.405 TFLOPS

Radeon 550X 640SP

1.371 TFLOPS

Radeon Sky 900

VS

Radeon 550X 640SP

Graphics Card

Mar 2013

Release Date

Apr 2018

Radeon Sky

Generation

Polaris

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

825 MHz

Base Clock

1019 MHz

950 MHz

Boost Clock

1071 MHz

1250 MHz

Memory Clock

1500 MHz

Memory

3GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

64bit

240.0GB/s

Bandwidth

48.00GB/s

Render Config

28

Compute Units

10

-

1792

Shading Units

640

112

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

30.40 GPixel/s

Pixel Rate

17.14 GPixel/s

106.4 GTexel/s

Texture Rate

42.84 GTexel/s

-

FP16 (half)

1371 GFLOPS

3.405 TFLOPS

FP32 (float)

1371 GFLOPS

851.2 GFLOPS

FP64 (double)

85.68 GFLOPS

Board Design

300W

TDP

50W

700 W

Suggested PSU

250 W

1x DVI 1x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

Lexa

Orthrus

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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