AMD Radeon HD 6850 X2 vs ATI Radeon HD 4750

VS

AMD Radeon HD 6850 X2

ATI Radeon HD 4750

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6850 X2 and 512MB VRAM Radeon HD 4750 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 2 years late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 51.20GB/s)

320 additional rendering cores

ATI Radeon HD 4750 's Advantages

Lower TDP (100W vs 254W)

Score

Benchmark

FP32 (float)

Radeon HD 6850 X2 +64%

1.536 TFLOPS

Radeon HD 4750

0.934 TFLOPS

Radeon HD 6850 X2

VS

Radeon HD 4750

Graphics Card

Sep 2011

Release Date

Sep 2009

Northern Islands

Generation

Radeon R700

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

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

51.20GB/s

Render Config

12

Compute Units

8

-

960

Shading Units

640

48

TMUs

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

11.68 GPixel/s

38.40 GTexel/s

Texture Rate

23.36 GTexel/s

-

1.536 TFLOPS

FP32 (float)

934.4 GFLOPS

-

FP64 (double)

186.9 GFLOPS

Board Design

254W

TDP

100W

600 W

Suggested PSU

300 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

RV740

Barts PRO (215-0798006)

GPU Variant

RV740 PRO

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.7 billion

Transistors

0.826 billion

255 mm²

Die Size

137 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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