AMD Radeon HD 7770 GHz Edition vs AMD Radeon HD 6850

VS

AMD Radeon HD 7770 GHz Edition

AMD Radeon HD 6850

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 7770 GHz Edition and 1024MB VRAM Radeon HD 6850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7770 GHz Edition 's Advantages

Released 1 years and 4 months late

Lower TDP (80W vs 127W)

AMD Radeon HD 6850 's Advantages

Larger VRAM bandwidth (128.0GB/s vs 72.00GB/s)

320 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7770 GHz Edition

1.28 TFLOPS

Radeon HD 6850 +16%

1.488 TFLOPS

Radeon HD 7770 GHz Edition

VS

Radeon HD 6850

Graphics Card

Feb 2012

Release Date

Oct 2010

Southern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1125 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

72.00GB/s

Bandwidth

128.0GB/s

Render Config

10

Compute Units

12

-

640

Shading Units

960

40

TMUs

48

16

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

16.00 GPixel/s

Pixel Rate

24.80 GPixel/s

40.00 GTexel/s

Texture Rate

37.20 GTexel/s

-

1280 GFLOPS

FP32 (float)

1488 GFLOPS

80.00 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

127W

250 W

Suggested PSU

300 W

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

Cape Verde

GPU Name

Barts

Cape Verde XT

GPU Variant

Barts PRO (215-0798006)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.5 billion

Transistors

1.7 billion

123 mm²

Die Size

255 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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