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ATI Radeon HD 4860

ATI Radeon HD 4860 Image ATI RV790 Image
The Radeon HD 4860 was a graphics card by ATI, launched in September 2009. Built on the 55 nm process, and based on the RV790 graphics processor, in its RV790 GT variant, the card supports DirectX 10.1. The RV790 graphics processor is an average sized chip with a die area of 282 mm² and 959 million transistors. Unlike the fully unlocked Radeon HD 4890, which uses the same GPU but has all 800 shaders enabled, ATI has disabled some shading units on the Radeon HD 4860 to reach the product's target shader count. It features 640 shading units, 32 texture mapping units and 16 ROPs. ATI has placed 512 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 700 MHz, memory is running at 750 MHz.
We recommend the ATI Radeon HD 4860 for gaming with highest details at resolutions up to, and including, 1280x720.
Being a dual-slot card, the ATI Radeon HD 4860 draws power from 2x 6-pin power connectors, with power draw rated at 130 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4860 is connected to the rest of the system using a PCIe 2.0 x16 interface.

Graphics Processor

GPU Name: RV790
GPU Variant: RV790 GT
Process Size: 55 nm
Transistors: 959 million
Die Size: 282 mm²

Graphics Card

Released: Sep 9th, 2009
Production Status: End-of-life
Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 700 MHz
Memory Clock: 750 MHz
3000 MHz effective

Memory

Memory Size: 512 MB
Memory Type: GDDR5
Memory Bus: 256 bit
Bandwidth: 96.0 GB/s

Render Config

Shading Units: 640
TMUs: 32
ROPs: 16
Compute Units: 8
Pixel Rate: 11.2 GPixel/s
Texture Rate: 22.4 GTexel/s
Floating-point performance: 896.0 GFLOPS

Board Design

Slot Width: Dual-slot
TDP: 130 W
Outputs: 2x DVI
1x S-Video
Power Connectors: 2x 6-pin

Graphics Features

DirectX: 10.1
OpenGL: 3.3
OpenCL: 1.0
Shader Model: 4.1

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Retail boards based on this design

Name GPU Clock Memory Clock Other Changes
Sapphire HD 4860 1 GB 700 MHz 750 MHz 1024 MB, 1x DVI 1x HDMI 1x DisplayPort