AMD Radeon HD 6850 X2 vs ATI Radeon HD 3650

VS

AMD Radeon HD 6850 X2

ATI Radeon HD 3650

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6850 X2 and 256MB VRAM Radeon HD 3650 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 8 months late

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (134.4GB/s vs 25.60GB/s)

840 additional rendering cores

ATI Radeon HD 3650 's Advantages

Lower TDP (65W vs 254W)

Score

Benchmark

FP32 (float)

Radeon HD 6850 X2 +782%

1.536 TFLOPS

Radeon HD 3650

0.174 TFLOPS

Radeon HD 6850 X2

VS

Radeon HD 3650

Graphics Card

Sep 2011

Release Date

Jan 2008

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

25.60GB/s

Render Config

12

Compute Units

3

-

960

Shading Units

120

48

TMUs

8

32

ROPs

4

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

128 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

2.900 GPixel/s

38.40 GTexel/s

Texture Rate

5.800 GTexel/s

-

1.536 TFLOPS

FP32 (float)

174.0 GFLOPS

-

Board Design

254W

TDP

65W

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

None

Graphics Processor

Barts

GPU Name

RV635

Barts PRO (215-0798006)

GPU Variant

RV635 PRO (215-0682008)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.378 billion

255 mm²

Die Size

135 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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