AMD Radeon HD 7970 vs ATI Radeon HD 4750

VS

AMD Radeon HD 7970

ATI Radeon HD 4750

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 and 512MB VRAM Radeon HD 4750 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 's Advantages

Released 2 years and 3 months late

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (264.0GB/s vs 51.20GB/s)

1408 additional rendering cores

ATI Radeon HD 4750 's Advantages

Lower TDP (100W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 +305%

3.789 TFLOPS

Radeon HD 4750

0.934 TFLOPS

Radeon HD 7970

VS

Radeon HD 4750

Graphics Card

Dec 2011

Release Date

Sep 2009

Southern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

800 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

264.0GB/s

Bandwidth

51.20GB/s

Render Config

32

Compute Units

8

-

2048

Shading Units

640

128

TMUs

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

128 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

11.68 GPixel/s

118.4 GTexel/s

Texture Rate

23.36 GTexel/s

-

3.789 TFLOPS

FP32 (float)

934.4 GFLOPS

947.2 GFLOPS

FP64 (double)

186.9 GFLOPS

Board Design

250W

TDP

100W

600 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x S-Video

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

RV740

Tahiti XT (215-0821060)

GPU Variant

RV740 PRO

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

0.826 billion

352 mm²

Die Size

137 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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