ATI Radeon HD 4770 vs ATI Radeon HD 4890

VS

ATI Radeon HD 4770

ATI Radeon HD 4890

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4770 and 1024MB VRAM Radeon HD 4890 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 190W)

ATI Radeon HD 4890 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (124.8GB/s vs 51.20GB/s)

160 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4770

0.96 TFLOPS

Radeon HD 4890 +41%

1.36 TFLOPS

Radeon HD 4770

VS

Radeon HD 4890

Graphics Card

Apr 2009

Release Date

Apr 2009

Radeon R700

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

975 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

51.20GB/s

Bandwidth

124.8GB/s

Render Config

8

Compute Units

10

-

640

Shading Units

800

32

TMUs

40

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

128 KB

L2 Cache

256 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

13.60 GPixel/s

24.00 GTexel/s

Texture Rate

34.00 GTexel/s

-

960.0 GFLOPS

FP32 (float)

1360 GFLOPS

192.0 GFLOPS

FP64 (double)

272.0 GFLOPS

Board Design

80W

TDP

190W

250 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

2x DVI 1x S-Video

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

RV740

GPU Name

RV790

RV740 XT (215-0727019)

GPU Variant

RV790 XT (215-0758016)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

0.826 billion

Transistors

0.959 billion

137 mm²

Die Size

282 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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