AMD Radeon HD 7870 GHz Edition vs ATI Radeon HD 3850 X3

VS

AMD Radeon HD 7870 GHz Edition

ATI Radeon HD 3850 X3

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition and 512MB VRAM Radeon HD 3850 X3 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 GHz Edition 's Advantages

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (153.6GB/s vs 54.40GB/s)

960 additional rendering cores

ATI Radeon HD 3850 X3 's Advantages

Lower TDP (145W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 GHz Edition +498%

2.56 TFLOPS

Radeon HD 3850 X3

0.428 TFLOPS

Radeon HD 7870 GHz Edition

VS

Radeon HD 3850 X3

Graphics Card

Mar 2012

Release Date

Unknown

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

850 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

153.6GB/s

Bandwidth

54.40GB/s

Render Config

20

Compute Units

4

-

1280

Shading Units

320

80

TMUs

16

32

ROPs

16

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

10.70 GPixel/s

80.00 GTexel/s

Texture Rate

10.70 GTexel/s

-

2.560 TFLOPS

FP32 (float)

428.2 GFLOPS

160.0 GFLOPS

FP64 (double)

-

Board Design

175W

TDP

145W

450 W

Suggested PSU

300 W

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

Outputs

4x DVI

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Pitcairn

GPU Name

RV670

Pitcairn XT (215-0828047)

GPU Variant

RV670 PRO (215-0708003)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

2.8 billion

Transistors

0.666 billion

212 mm²

Die Size

192 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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