AMD Radeon R9 255 OEM vs AMD Radeon HD 6450

VS

AMD Radeon R9 255 OEM

AMD Radeon HD 6450

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 255 OEM and 512MB VRAM Radeon HD 6450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 255 OEM 's Advantages

Released 2 years and 8 months late

Boost Clock930MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (73.60GB/s vs 25.60GB/s)

352 additional rendering cores

AMD Radeon HD 6450 's Advantages

Lower TDP (18W vs 65W)

Score

Benchmark

FP32 (float)

Radeon R9 255 OEM +376%

0.952 TFLOPS

Radeon HD 6450

0.2 TFLOPS

Radeon R9 255 OEM

VS

Radeon HD 6450

Graphics Card

Dec 2013

Release Date

Apr 2011

Volcanic Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

900 MHz

Base Clock

-

930 MHz

Boost Clock

-

1150 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

64bit

73.60GB/s

Bandwidth

25.60GB/s

Render Config

8

Compute Units

2

-

512

Shading Units

160

32

TMUs

8

16

ROPs

4

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

14.88 GPixel/s

Pixel Rate

2.500 GPixel/s

29.76 GTexel/s

Texture Rate

5.000 GTexel/s

-

952.3 GFLOPS

FP32 (float)

200.0 GFLOPS

59.52 GFLOPS

FP64 (double)

-

Board Design

65W

TDP

18W

250 W

Suggested PSU

200 W

No outputs

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin

Power Connectors

None

Graphics Processor

Cape Verde

GPU Name

Caicos

Cape Verde PRX

GPU Variant

Caicos PRO

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.5 billion

Transistors

0.37 billion

123 mm²

Die Size

67 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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