ATI Radeon HD 5670 vs ATI Radeon HD 4855

VS

ATI Radeon HD 5670

ATI Radeon HD 4855

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 5670 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 5670 's Advantages

More VRAM (1024GB vs 512GB)

Lower TDP (64W vs 110W)

ATI Radeon HD 4855 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 64.00GB/s)

240 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 5670

0.62 TFLOPS

Radeon HD 4855 +18%

0.736 TFLOPS

Radeon HD 5670

VS

Radeon HD 4855

Graphics Card

Jan 2010

Release Date

Jan 2010

Evergreen

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

900 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

64.00GB/s

Bandwidth

115.2GB/s

Render Config

5

Compute Units

8

-

400

Shading Units

640

20

TMUs

32

8

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

6.200 GPixel/s

Pixel Rate

9.200 GPixel/s

15.50 GTexel/s

Texture Rate

18.40 GTexel/s

-

620.0 GFLOPS

FP32 (float)

736.0 GFLOPS

-

FP64 (double)

147.2 GFLOPS

Board Design

64W

TDP

110W

250 W

Suggested PSU

300 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

None

Power Connectors

1x 6-pin

Graphics Processor

Redwood

GPU Name

RV770

Redwood XT (215-0757002)

GPU Variant

RV770 PRO (215-0669065)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

0.627 billion

Transistors

0.956 billion

104 mm²

Die Size

256 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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