ATI Radeon HD 4870 X2 vs ATI Radeon HD 5550

VS

ATI Radeon HD 4870 X2

ATI Radeon HD 5550

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 512MB VRAM Radeon HD 5550 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 X2 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (115.2GB/s vs 51.20GB/s)

480 additional rendering cores

ATI Radeon HD 5550 's Advantages

Released 1 years and 6 months late

Lower TDP (39W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2 +240%

1.2 TFLOPS

Radeon HD 5550

0.352 TFLOPS

Radeon HD 4870 X2

VS

Radeon HD 5550

Graphics Card

Aug 2008

Release Date

Feb 2010

Radeon R700

Generation

Evergreen

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

800 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

51.20GB/s

Render Config

10

Compute Units

4

-

800

Shading Units

320

40

TMUs

16

ROPs

8

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

4.400 GPixel/s

30.00 GTexel/s

Texture Rate

8.800 GTexel/s

-

1200 GFLOPS

FP32 (float)

352.0 GFLOPS

240.0 GFLOPS

FP64 (double)

-

Board Design

286W

TDP

39W

600 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

R700

GPU Name

Redwood

R700 XT (215-0669045)

GPU Variant

Redwood PRO2

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

0.627 billion

256 mm²

Die Size

104 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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