AMD Radeon HD 6850 X2 vs ATI Radeon HD 3850

VS

AMD Radeon HD 6850 X2

ATI Radeon HD 3850

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6850 X2 and 512MB VRAM Radeon HD 3850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6850 X2 's Advantages

Released 3 years and 10 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 53.12GB/s)

640 additional rendering cores

ATI Radeon HD 3850 's Advantages

Lower TDP (75W vs 254W)

Score

Benchmark

FP32 (float)

Radeon HD 6850 X2 +258%

1.536 TFLOPS

Radeon HD 3850

0.428 TFLOPS

Radeon HD 6850 X2

VS

Radeon HD 3850

Graphics Card

Sep 2011

Release Date

Nov 2007

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

830 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

53.12GB/s

Render Config

12

Compute Units

4

-

960

Shading Units

320

48

TMUs

16

32

ROPs

16

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

10.69 GPixel/s

38.40 GTexel/s

Texture Rate

10.69 GTexel/s

-

1.536 TFLOPS

FP32 (float)

427.5 GFLOPS

-

FP64 (double)

85.50 GFLOPS

Board Design

254W

TDP

75W

600 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x S-Video

2x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Barts

GPU Name

RV670

Barts PRO (215-0798006)

GPU Variant

RV670 PRO (215-0708003)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.666 billion

255 mm²

Die Size

192 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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