AMD Radeon HD 7970 vs ATI Radeon HD 3450

VS

AMD Radeon HD 7970

ATI Radeon HD 3450

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 and 256MB VRAM Radeon HD 3450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 's Advantages

Released 4 years late

More VRAM (3GB vs 256GB)

Larger VRAM bandwidth (264.0GB/s vs 8.000GB/s)

2008 additional rendering cores

ATI Radeon HD 3450 's Advantages

Lower TDP (25W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 +7793%

3.789 TFLOPS

Radeon HD 3450

0.048 TFLOPS

Radeon HD 7970

VS

Radeon HD 3450

Graphics Card

Dec 2011

Release Date

Dec 2007

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

500 MHz

Memory

3GB

Memory Size

256MB

GDDR5

Memory Type

DDR2

384bit

Memory Bus

64bit

264.0GB/s

Bandwidth

8.000GB/s

Render Config

32

Compute Units

2

-

2048

Shading Units

40

128

TMUs

4

32

ROPs

4

-

16 KB (per CU)

L1 Cache

-

768 KB

L2 Cache

64 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

2.400 GPixel/s

118.4 GTexel/s

Texture Rate

2.400 GTexel/s

-

3.789 TFLOPS

FP32 (float)

48.00 GFLOPS

947.2 GFLOPS

FP64 (double)

-

Board Design

250W

TDP

25W

600 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x VGA 1x S-Video

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

RV620

Tahiti XT (215-0821060)

GPU Variant

RV620 LE

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.181 billion

352 mm²

Die Size

67 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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