ATI Radeon HD 3550 vs ATI Radeon HD 4855

VS

ATI Radeon HD 3550

ATI Radeon HD 4855

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3550 and 512MB VRAM Radeon HD 4855 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3550 's Advantages

Lower TDP (30W vs 110W)

ATI Radeon HD 4855 's Advantages

Released 1 years and 5 months late

Larger VRAM bandwidth (115.2GB/s vs 6.336GB/s)

600 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 3550

0.048 TFLOPS

Radeon HD 4855 +1433%

0.736 TFLOPS

Radeon HD 3550

VS

Radeon HD 4855

Graphics Card

Aug 2008

Release Date

Jan 2010

Radeon R600

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

396 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

512MB

DDR2

Memory Type

GDDR5

64bit

Memory Bus

256bit

6.336GB/s

Bandwidth

115.2GB/s

Render Config

2

Compute Units

8

-

40

Shading Units

640

4

TMUs

32

4

ROPs

16

-

L1 Cache

16 KB (per CU)

64 KB

L2 Cache

256 KB

-

Theoretical Performance

2.376 GPixel/s

Pixel Rate

9.200 GPixel/s

2.376 GTexel/s

Texture Rate

18.40 GTexel/s

-

47.52 GFLOPS

FP32 (float)

736.0 GFLOPS

-

FP64 (double)

147.2 GFLOPS

Board Design

30W

TDP

110W

200 W

Suggested PSU

300 W

2x DisplayPort

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

None

Power Connectors

1x 6-pin

Graphics Processor

RV620

GPU Name

RV770

RV620 PRO (215-0670006)

GPU Variant

RV770 PRO (215-0669065)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.181 billion

Transistors

0.956 billion

67 mm²

Die Size

256 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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