ATI Radeon HD 4870 X2 vs AMD Radeon HD 6850 1440SP Edition

VS

ATI Radeon HD 4870 X2

AMD Radeon HD 6850 1440SP Edition

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 1024MB VRAM Radeon HD 6850 1440SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6850 1440SP Edition 's Advantages

Released 4 years late

Larger VRAM bandwidth (128.0GB/s vs 115.2GB/s)

640 additional rendering cores

Lower TDP (151W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2

1.2 TFLOPS

Radeon HD 6850 1440SP Edition +74%

2.088 TFLOPS

Radeon HD 4870 X2

VS

Radeon HD 6850 1440SP Edition

Graphics Card

Aug 2008

Release Date

Aug 2012

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

128.0GB/s

Render Config

10

Compute Units

18

-

800

Shading Units

1440

40

TMUs

72

16

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

23.20 GPixel/s

30.00 GTexel/s

Texture Rate

52.20 GTexel/s

-

1200 GFLOPS

FP32 (float)

2.088 TFLOPS

240.0 GFLOPS

FP64 (double)

417.6 GFLOPS

Board Design

286W

TDP

151W

600 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

R700

GPU Name

Cypress

R700 XT (215-0669045)

GPU Variant

Cypress PRO (215-0735043)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

2.154 billion

256 mm²

Die Size

334 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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