AMD Radeon HD 7850 vs AMD Radeon HD 7970 GHz Edition

VS

AMD Radeon HD 7850

AMD Radeon HD 7970 GHz Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7850 and 3GB VRAM Radeon HD 7970 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7850 's Advantages

Lower TDP (130W vs 300W)

AMD Radeon HD 7970 GHz Edition 's Advantages

Boost Clock1050MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 153.6GB/s)

1024 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7850

1.761 TFLOPS

Radeon HD 7970 GHz Edition +144%

4.301 TFLOPS

Radeon HD 7850

VS

Radeon HD 7970 GHz Edition

Graphics Card

Mar 2012

Release Date

Jun 2012

Southern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1000 MHz

-

Boost Clock

1050 MHz

1200 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

153.6GB/s

Bandwidth

288.0GB/s

Render Config

16

Compute Units

32

-

1024

Shading Units

2048

64

TMUs

128

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

27.52 GPixel/s

Pixel Rate

33.60 GPixel/s

55.04 GTexel/s

Texture Rate

134.4 GTexel/s

-

1.761 TFLOPS

FP32 (float)

4.301 TFLOPS

110.1 GFLOPS

FP64 (double)

1075 GFLOPS

Board Design

130W

TDP

300W

300 W

Suggested PSU

700 W

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

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Pitcairn

GPU Name

Tahiti

Pitcairn PRO (215-0828062)

GPU Variant

Tahiti XT2 (215-0821065)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

4.313 billion

212 mm²

Die Size

352 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

5.1

Shader Model

5.1

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