ATI Radeon HD 4870 vs ATI Radeon HD 4770

VS

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 and 512MB VRAM Radeon HD 4770 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 51.20GB/s)

160 additional rendering cores

ATI Radeon HD 4770 's Advantages

Released 10 months late

Lower TDP (80W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 +25%

1.2 TFLOPS

Radeon HD 4770

0.96 TFLOPS

Radeon HD 4870

VS

Radeon HD 4770

Graphics Card

Jun 2008

Release Date

Apr 2009

Radeon R700

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

900 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

51.20GB/s

Render Config

-

SM Count

-

10

Compute Units

8

800

Shading Units

640

40

TMUs

32

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

128 KB

Theoretical Performance

12.00 GPixel/s

Pixel Rate

12.00 GPixel/s

30.00 GTexel/s

Texture Rate

24.00 GTexel/s

-

FP16 (half)

-

1200 GFLOPS

FP32 (float)

960.0 GFLOPS

240.0 GFLOPS

FP64 (double)

192.0 GFLOPS

Graphics Processor

RV770

GPU Name

RV740

RV770 XT (215-0669049)

GPU Variant

RV740 XT (215-0727019)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

0.826 billion

256 mm²

Die Size

137 mm²

Board Design

150W

TDP

80W

450 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 6-pin

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

-

CUDA

-

4.1

Shader Model

4.1

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