AMD Radeon HD 7950 vs AMD Radeon HD 6850

VS

AMD Radeon HD 7950

AMD Radeon HD 6850

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7950 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 7950 's Advantages

Released 1 years and 3 months late

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (240.0GB/s vs 128.0GB/s)

832 additional rendering cores

AMD Radeon HD 6850 's Advantages

Lower TDP (127W vs 200W)

Score

Benchmark

FP32 (float)

Radeon HD 7950 +92%

2.867 TFLOPS

Radeon HD 6850

1.488 TFLOPS

Radeon HD 7950

VS

Radeon HD 6850

Graphics Card

Jan 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

-

1250 MHz

Memory Clock

1000 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

240.0GB/s

Bandwidth

128.0GB/s

Render Config

28

Compute Units

12

-

1792

Shading Units

960

112

TMUs

48

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

24.80 GPixel/s

89.60 GTexel/s

Texture Rate

37.20 GTexel/s

-

2.867 TFLOPS

FP32 (float)

1488 GFLOPS

716.8 GFLOPS

FP64 (double)

-

Board Design

200W

TDP

127W

550 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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

Barts

Tahiti PRO (215-0821056)

GPU Variant

Barts PRO (215-0798006)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

1.7 billion

352 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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