ATI Radeon HD 4870 X2 vs AMD Radeon R9 255 OEM

VS

ATI Radeon HD 4870 X2

AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 2GB VRAM Radeon R9 255 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 X2 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 73.60GB/s)

288 additional rendering cores

AMD Radeon R9 255 OEM 's Advantages

Released 5 years and 4 months late

Boost Clock930MHz

More VRAM (2GB vs 1024GB)

Lower TDP (65W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2 +26%

1.2 TFLOPS

Radeon R9 255 OEM

0.952 TFLOPS

Radeon HD 4870 X2

VS

Radeon R9 255 OEM

Graphics Card

Aug 2008

Release Date

Dec 2013

Radeon R700

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

900 MHz

-

Boost Clock

930 MHz

900 MHz

Memory Clock

1150 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

73.60GB/s

Render Config

10

Compute Units

8

-

800

Shading Units

512

40

TMUs

32

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

14.88 GPixel/s

30.00 GTexel/s

Texture Rate

29.76 GTexel/s

-

1200 GFLOPS

FP32 (float)

952.3 GFLOPS

240.0 GFLOPS

FP64 (double)

59.52 GFLOPS

Board Design

286W

TDP

65W

600 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

No outputs

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

R700

GPU Name

Cape Verde

R700 XT (215-0669045)

GPU Variant

Cape Verde PRX

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

1.5 billion

256 mm²

Die Size

123 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_1)

3.3

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

-

4.1

Shader Model

5.1

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