ATI Radeon HD 3850 X3 vs AMD Radeon HD 6870

VS

ATI Radeon HD 3850 X3

AMD Radeon HD 6870

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3850 X3 and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3850 X3 's Advantages

Lower TDP (145W vs 151W)

AMD Radeon HD 6870 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 54.40GB/s)

800 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 3850 X3

0.428 TFLOPS

Radeon HD 6870 +371%

2.016 TFLOPS

Radeon HD 3850 X3

VS

Radeon HD 6870

Graphics Card

Unknown

Release Date

Oct 2010

Radeon R600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

850 MHz

Memory Clock

1050 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

256bit

54.40GB/s

Bandwidth

134.4GB/s

Render Config

4

Compute Units

14

-

320

Shading Units

1120

16

TMUs

56

16

ROPs

32

-

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

10.70 GPixel/s

Pixel Rate

28.80 GPixel/s

10.70 GTexel/s

Texture Rate

50.40 GTexel/s

-

428.2 GFLOPS

FP32 (float)

2.016 TFLOPS

-

Board Design

145W

TDP

151W

300 W

Suggested PSU

450 W

4x DVI

Outputs

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

1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

RV670

GPU Name

Barts

RV670 PRO (215-0708003)

GPU Variant

Barts XT (215-0798000)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

1.7 billion

192 mm²

Die Size

255 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3 (full) 4.0 (partial)

OpenGL

4.4

N/A

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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