AMD Radeon HD 6390 vs AMD Radeon HD 7970

VS

AMD Radeon HD 6390

AMD Radeon HD 7970

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6390 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 6390 's Advantages

Lower TDP (39W vs 250W)

AMD Radeon HD 7970 's Advantages

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (264.0GB/s vs 16.00GB/s)

1728 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6390

0.352 TFLOPS

Radeon HD 7970 +976%

3.789 TFLOPS

Radeon HD 6390

VS

Radeon HD 7970

Graphics Card

Jul 2011

Release Date

Dec 2011

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

500 MHz

Memory Clock

1375 MHz

Memory

1024MB

Memory Size

3GB

DDR2

Memory Type

GDDR5

128bit

Memory Bus

384bit

16.00GB/s

Bandwidth

264.0GB/s

Render Config

4

Compute Units

32

-

320

Shading Units

2048

16

TMUs

128

8

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

4.400 GPixel/s

Pixel Rate

29.60 GPixel/s

8.800 GTexel/s

Texture Rate

118.4 GTexel/s

-

352.0 GFLOPS

FP32 (float)

3.789 TFLOPS

-

FP64 (double)

947.2 GFLOPS

Board Design

39W

TDP

250W

200 W

Suggested PSU

600 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

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

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Redwood

GPU Name

Tahiti

Redwood LE

GPU Variant

Tahiti XT (215-0821060)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.627 billion

Transistors

4.313 billion

104 mm²

Die Size

352 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

5.0

Shader Model

5.1

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