ATI Radeon HD 4770 vs AMD Radeon HD 6790

VS

ATI Radeon HD 4770

AMD Radeon HD 6790

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4770 and 1024MB VRAM Radeon HD 6790 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 150W)

AMD Radeon HD 6790 's Advantages

Released 2 years late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 51.20GB/s)

160 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4770

0.96 TFLOPS

Radeon HD 6790 +40%

1.344 TFLOPS

Radeon HD 4770

VS

Radeon HD 6790

Graphics Card

Apr 2009

Release Date

Apr 2011

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1050 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

51.20GB/s

Bandwidth

134.4GB/s

Render Config

8

Compute Units

10

-

640

Shading Units

800

32

TMUs

40

16

ROPs

16

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

128 KB

L2 Cache

512 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

13.44 GPixel/s

24.00 GTexel/s

Texture Rate

33.60 GTexel/s

-

960.0 GFLOPS

FP32 (float)

1344 GFLOPS

192.0 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

150W

250 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

RV740

GPU Name

Barts

RV740 XT (215-0727019)

GPU Variant

Barts LE (215-0798002)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

0.826 billion

Transistors

1.7 billion

137 mm²

Die Size

255 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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