AMD Radeon HD 7850 vs AMD Radeon HD 7970

VS

AMD Radeon HD 7850

AMD Radeon HD 7970

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7850 and 3GB VRAM Radeon HD 7970 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 250W)

AMD Radeon HD 7970 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 153.6GB/s)

1024 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7850

1.761 TFLOPS

Radeon HD 7970 +115%

3.789 TFLOPS

3DMark Time Spy

Radeon HD 7850

1312

Radeon HD 7970 +73%

2279

Radeon HD 7850

VS

Radeon HD 7970

Graphics Card

Mar 2012

Release Date

Dec 2011

Southern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

1375 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

153.6GB/s

Bandwidth

264.0GB/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

29.60 GPixel/s

55.04 GTexel/s

Texture Rate

118.4 GTexel/s

-

1.761 TFLOPS

FP32 (float)

3.789 TFLOPS

110.1 GFLOPS

FP64 (double)

947.2 GFLOPS

Board Design

130W

TDP

250W

300 W

Suggested PSU

600 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 XT (215-0821060)

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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