AMD Radeon HD 6850 1440SP Edition vs AMD Radeon HD 7870 XT

VS

AMD Radeon HD 6850 1440SP Edition

AMD Radeon HD 7870 XT

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6850 1440SP Edition and 2GB VRAM Radeon HD 7870 XT 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

Lower TDP (151W vs 185W)

AMD Radeon HD 7870 XT 's Advantages

Boost Clock975MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (192.0GB/s vs 128.0GB/s)

96 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6850 1440SP Edition

2.088 TFLOPS

Radeon HD 7870 XT +43%

2.995 TFLOPS

Radeon HD 6850 1440SP Edition

VS

Radeon HD 7870 XT

Graphics Card

Aug 2012

Release Date

Nov 2012

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

925 MHz

-

Boost Clock

975 MHz

1000 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

128.0GB/s

Bandwidth

192.0GB/s

Render Config

18

Compute Units

24

-

1440

Shading Units

1536

72

TMUs

96

32

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

23.20 GPixel/s

Pixel Rate

31.20 GPixel/s

52.20 GTexel/s

Texture Rate

93.60 GTexel/s

-

2.088 TFLOPS

FP32 (float)

2.995 TFLOPS

417.6 GFLOPS

FP64 (double)

748.8 GFLOPS

Board Design

151W

TDP

185W

450 W

Suggested PSU

450 W

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

Outputs

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

Cypress

GPU Name

Tahiti

Cypress PRO (215-0735043)

GPU Variant

Tahiti LE (215-0821122)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

2.154 billion

Transistors

4.313 billion

334 mm²

Die Size

352 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

5.0

Shader Model

5.1

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