AMD Radeon HD 7970 vs AMD Radeon HD 6450 OEM

VS

AMD Radeon HD 7970

AMD Radeon HD 6450 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 and 512MB VRAM Radeon HD 6450 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 's Advantages

Released 10 months late

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (264.0GB/s vs 8.528GB/s)

1888 additional rendering cores

AMD Radeon HD 6450 OEM 's Advantages

Lower TDP (18W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 +1794%

3.789 TFLOPS

Radeon HD 6450 OEM

0.2 TFLOPS

Radeon HD 7970

VS

Radeon HD 6450 OEM

Graphics Card

Dec 2011

Release Date

Feb 2011

Southern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

533 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

64bit

264.0GB/s

Bandwidth

8.528GB/s

Render Config

32

Compute Units

2

-

2048

Shading Units

160

128

TMUs

8

32

ROPs

4

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

128 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

2.500 GPixel/s

118.4 GTexel/s

Texture Rate

5.000 GTexel/s

-

3.789 TFLOPS

FP32 (float)

200.0 GFLOPS

947.2 GFLOPS

FP64 (double)

-

Board Design

250W

TDP

18W

600 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

Caicos

Tahiti XT (215-0821060)

GPU Variant

Junbonator

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

0.37 billion

352 mm²

Die Size

67 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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