AMD Radeon HD 6870 X2 vs ATI Radeon HD 5450 PCIe x1

VS

AMD Radeon HD 6870 X2

ATI Radeon HD 5450 PCIe x1

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 512MB VRAM Radeon HD 5450 PCIe x1 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

Released 1 years and 5 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 8.000GB/s)

1040 additional rendering cores

ATI Radeon HD 5450 PCIe x1 's Advantages

Lower TDP (19W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +1838%

2.016 TFLOPS

Radeon HD 5450 PCIe x1

0.104 TFLOPS

Radeon HD 6870 X2

VS

Radeon HD 5450 PCIe x1

Graphics Card

Jul 2011

Release Date

Feb 2010

Northern Islands

Generation

Evergreen

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x1

Clock Speeds

-

1050 MHz

Memory Clock

500 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

8.000GB/s

Render Config

14

Compute Units

2

-

1120

Shading Units

80

56

TMUs

8

32

ROPs

4

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

2.600 GPixel/s

50.40 GTexel/s

Texture Rate

5.200 GTexel/s

-

2.016 TFLOPS

FP32 (float)

104.0 GFLOPS

-

Board Design

300W

TDP

19W

700 W

Suggested PSU

200 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

-

Graphics Processor

Barts

GPU Name

Cedar

Barts XT (215-0798000)

GPU Variant

Cedar PRO

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.7 billion

Transistors

0.292 billion

255 mm²

Die Size

59 mm²

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

5.0

Shader Model

5.0

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