ATI Radeon HD 4870: GPU Specs & Benchmarks

The Radeon HD 4870 is a graphics card by ATI, built on the 55 nm process and based on the RV770 graphics processor (GPU). The video card specifications and performance tests (benchmarks) are listed below.

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Benchmarks

3DMark Fire Strike

336

Graphics Processor (GPU)

GPU Name

RV770

Model number

RV770 XT
(215-0669049)

Architecture

TeraScale

Foundry

TSMC

Process Size

55 nm

Transistors

956 million

Die Size

256 mm²

Graphics Card

Release Date

Jun 25th, 2008

Family

Radeon R700
(HD 4800)

Production

End-of-life

Launch Price

299 USD

Predecessor

Radeon R600

Bus Interface

PCIe 2.0 x16

Memory

Memory Size

512 MB

Memory Type

GDDR5

Memory Bus

256 bit

Bandwidth

115.2 GB/s

Performance

Pixel fillrate

12.00 GPixel/s

Texture fillrate

30.00 GTexel/s

FP32 (float) performance

1,200 GFLOPS

FP64 (double) performance

240.0 GFLOPS (1:5)

Clock Speeds

Memory Clock

900 MHz
3.6 Gbps effective

GPU Clock

750 MHz

Render Config

Shading Units

800

TMUs

40

ROPs

16

Compute Units

10

L1 Cache

16 KB (per CU)

L2 Cache

256 KB

Board Design

Slot Width

Dual-slot

Length

241 mm
9.5 inches

Width

111 mm
4.4 inches

Height

40 mm
1.6 inches

Thermal design power (TDP)

150 W

Suggested PSU

450 W

Display Connectors

2x DVI
1x S-Video

Power Connectors

2x 6-pin

Board Number

B507-31

API support

DirectX

10.1 (10_1)

OpenGL

3.3

OpenCL

1.1

Vulkan

N/A

Shader Model

4.1