AMD Radeon RX 550X 640SP vs AMD Radeon R9 255 OEM

VS

AMD Radeon RX 550X 640SP

AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon RX 550X 640SP and 2GB VRAM Radeon R9 255 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 550X 640SP 's Advantages

Released 4 years and 4 months late

Boost Clock has increased by 15% (1071MHz vs 930MHz)

Larger VRAM bandwidth (96.00GB/s vs 73.60GB/s)

128 additional rendering cores

Lower TDP (60W vs 65W)

Score

Benchmark

FP32 (float)

Radeon RX 550X 640SP +44%

1.371 TFLOPS

Radeon R9 255 OEM

0.952 TFLOPS

Radeon RX 550X 640SP

VS

Radeon R9 255 OEM

Graphics Card

Apr 2018

Release Date

Dec 2013

Polaris

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1019 MHz

Base Clock

900 MHz

1071 MHz

Boost Clock

930 MHz

1500 MHz

Memory Clock

1150 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

96.00GB/s

Bandwidth

73.60GB/s

Render Config

10

Compute Units

8

-

640

Shading Units

512

40

TMUs

32

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

17.14 GPixel/s

Pixel Rate

14.88 GPixel/s

42.84 GTexel/s

Texture Rate

29.76 GTexel/s

1371 GFLOPS

FP16 (half)

-

1371 GFLOPS

FP32 (float)

952.3 GFLOPS

85.68 GFLOPS

FP64 (double)

59.52 GFLOPS

Board Design

60W

TDP

65W

250 W

Suggested PSU

250 W

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

Outputs

No outputs

None

Power Connectors

1x 6-pin

Graphics Processor

Baffin

GPU Name

Cape Verde

Baffin LE

GPU Variant

Cape Verde PRX

GCN 4.0

Architecture

GCN 1.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

3 billion

Transistors

1.5 billion

123 mm²

Die Size

123 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

Vulkan

1.2

-

6.4

Shader Model

5.1

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