ATI Radeon HD 4770 vs AMD Radeon HD 6850 X2

VS

ATI Radeon HD 4770

AMD Radeon HD 6850 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4770 and 2GB VRAM Radeon HD 6850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4770 's Advantages

Lower TDP (80W vs 254W)

AMD Radeon HD 6850 X2 's Advantages

Released 2 years and 5 months late

More VRAM (2GB vs 512GB)

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

320 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4770

0.96 TFLOPS

Radeon HD 6850 X2 +60%

1.536 TFLOPS

Radeon HD 4770

VS

Radeon HD 6850 X2

Graphics Card

Apr 2009

Release Date

Sep 2011

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1050 MHz

Memory

512MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

51.20GB/s

Bandwidth

134.4GB/s

Render Config

8

Compute Units

12

-

640

Shading Units

960

32

TMUs

48

16

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

128 KB

L2 Cache

512 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

25.60 GPixel/s

24.00 GTexel/s

Texture Rate

38.40 GTexel/s

-

960.0 GFLOPS

FP32 (float)

1.536 TFLOPS

192.0 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

254W

250 W

Suggested PSU

600 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

RV740

GPU Name

Barts

RV740 XT (215-0727019)

GPU Variant

Barts PRO (215-0798006)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

0.826 billion

Transistors

1.7 billion

137 mm²

Die Size

255 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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