AMD Radeon R9 280X2 vs ATI Radeon HD 4855

VS

AMD Radeon R9 280X2

ATI Radeon HD 4855

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X2 and 512MB VRAM Radeon HD 4855 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 280X2 's Advantages

Boost Clock1000MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (288.0GB/s vs 115.2GB/s)

1408 additional rendering cores

ATI Radeon HD 4855 's Advantages

Lower TDP (110W vs 375W)

Score

Benchmark

FP32 (float)

Radeon R9 280X2 +456%

4.096 TFLOPS

Radeon HD 4855

0.736 TFLOPS

Radeon R9 280X2

VS

Radeon HD 4855

Graphics Card

Unknown

Release Date

Jan 2010

Volcanic Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

950 MHz

Base Clock

-

1000 MHz

Boost Clock

-

1500 MHz

Memory Clock

900 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

288.0GB/s

Bandwidth

115.2GB/s

Render Config

32

Compute Units

8

-

2048

Shading Units

640

128

TMUs

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

9.200 GPixel/s

128.0 GTexel/s

Texture Rate

18.40 GTexel/s

-

4.096 TFLOPS

FP32 (float)

736.0 GFLOPS

1024 GFLOPS

FP64 (double)

147.2 GFLOPS

Board Design

375W

TDP

110W

750 W

Suggested PSU

300 W

6x mini-DisplayPort 1.2

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

3x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

RV770

Tahiti XTL (215-0821065)

GPU Variant

RV770 PRO (215-0669065)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.956 billion

352 mm²

Die Size

256 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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