ATI Radeon HD 3850 AGP vs AMD Radeon HD 6870 X2

VS

ATI Radeon HD 3850 AGP

AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3850 AGP and 1024MB VRAM Radeon HD 6870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3850 AGP 's Advantages

Lower TDP (75W vs 300W)

AMD Radeon HD 6870 X2 's Advantages

Released 3 years and 6 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 52.99GB/s)

800 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 3850 AGP

0.428 TFLOPS

Radeon HD 6870 X2 +371%

2.016 TFLOPS

Radeon HD 3850 AGP

VS

Radeon HD 6870 X2

Graphics Card

Jan 2008

Release Date

Jul 2011

Radeon R600

Generation

Northern Islands

Desktop

Type

Desktop

AGP 8x

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

828 MHz

Memory Clock

1050 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

256bit

52.99GB/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

10.69 GPixel/s

Pixel Rate

28.80 GPixel/s

10.69 GTexel/s

Texture Rate

50.40 GTexel/s

-

427.5 GFLOPS

FP32 (float)

2.016 TFLOPS

85.50 GFLOPS

FP64 (double)

-

Board Design

75W

TDP

300W

250 W

Suggested PSU

700 W

2x DVI 1x S-Video

Outputs

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

1x 8-pin

Power Connectors

-

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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