ATI Radeon HD 4770 vs AMD Radeon HD 7990

VS

ATI Radeon HD 4770

AMD Radeon HD 7990

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4770 and 3GB VRAM Radeon HD 7990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4770 's Advantages

Lower TDP (80W vs 375W)

AMD Radeon HD 7990 's Advantages

Released 4 years late

Boost Clock1000MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (288.0GB/s vs 51.20GB/s)

1408 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4770

0.96 TFLOPS

Radeon HD 7990 +326%

4.096 TFLOPS

Radeon HD 4770

VS

Radeon HD 7990

Graphics Card

Apr 2009

Release Date

Apr 2013

Radeon R700

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

950 MHz

-

Boost Clock

1000 MHz

800 MHz

Memory Clock

1500 MHz

Memory

512MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

384bit

51.20GB/s

Bandwidth

288.0GB/s

Render Config

8

Compute Units

32

-

640

Shading Units

2048

32

TMUs

128

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

128 KB

L2 Cache

768 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

32.00 GPixel/s

24.00 GTexel/s

Texture Rate

128.0 GTexel/s

-

960.0 GFLOPS

FP32 (float)

4.096 TFLOPS

192.0 GFLOPS

FP64 (double)

1024 GFLOPS

Board Design

80W

TDP

375W

250 W

Suggested PSU

750 W

2x DVI 1x S-Video

Outputs

1x DVI 4x mini-DisplayPort 1.2

1x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

RV740

GPU Name

Malta

RV740 XT (215-0727019)

GPU Variant

Malta XT (215-0849026)

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.826 billion

Transistors

4.313 billion

137 mm²

Die Size

365 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_1)

3.3

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

-

4.1

Shader Model

5.1

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