AMD Radeon HD 6870 X2 vs ATI Radeon HD 4520

VS

AMD Radeon HD 6870 X2

ATI Radeon HD 4520

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 512MB VRAM Radeon HD 4520 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

Released 1 years and 7 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 6.400GB/s)

1040 additional rendering cores

ATI Radeon HD 4520 's Advantages

Lower TDP (25W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +2000%

2.016 TFLOPS

Radeon HD 4520

0.096 TFLOPS

Radeon HD 6870 X2

VS

Radeon HD 4520

Graphics Card

Jul 2011

Release Date

Dec 2009

Northern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

400 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

6.400GB/s

Render Config

14

Compute Units

1

-

1120

Shading Units

80

56

TMUs

8

32

ROPs

4

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

64 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

2.400 GPixel/s

50.40 GTexel/s

Texture Rate

4.800 GTexel/s

-

2.016 TFLOPS

FP32 (float)

96.00 GFLOPS

-

Board Design

300W

TDP

25W

700 W

Suggested PSU

200 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

1x DVI 1x HDMI 1.3a 1x DisplayPort 1.0

-

Power Connectors

None

Graphics Processor

Barts

GPU Name

RV710

Barts XT (215-0798000)

GPU Variant

RV710 (215-0725016)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.242 billion

255 mm²

Die Size

73 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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