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ATI Radeon HD 4890

ATI Radeon HD 4890 Image ATI RV790 Image
The Radeon HD 4890 was a performance graphics card by ATI, launched in April 2009. Built on the 55 nm process, and based on the RV790 graphics processor, in its RV790 XT 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. It features 800 shading units, 40 texture mapping units and 16 ROPs. ATI has placed 1,024 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 850 MHz, memory is running at 975 MHz.
We recommend the ATI Radeon HD 4890 for gaming with highest details at resolutions up to, and including, 1280x720.
Being a dual-slot card, the ATI Radeon HD 4890 draws power from 2x 6-pin power connectors, with power draw rated at 190 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4890 is connected to the rest of the system using a PCIe 2.0 x16 interface. The card measures 241 mm in length, and features a dual-slot cooling solution. Its price at launch was 249 US Dollars.

Graphics Processor

GPU Name: RV790
GPU Variant: RV790 XT
Architecture: TeraScale
Process Size: 55 nm
Transistors: 959 million
Die Size: 282 mm²

Graphics Card

Released: Apr 2nd, 2009
Production Status: End-of-life
Launch Price: 249 USD
Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 850 MHz
Memory Clock: 975 MHz
3900 MHz effective


Memory Size: 1024 MB
Memory Type: GDDR5
Memory Bus: 256 bit
Bandwidth: 124.8 GB/s

Render Config

Shading Units: 800
TMUs: 40
ROPs: 16
Compute Units: 10
Pixel Rate: 13.60 GPixel/s
Texture Rate: 34.0 GTexel/s
Floating-point performance: 1,360.0 GFLOPS

Board Design

Slot Width: Dual-slot
Length: 9.49 inches
241 mm
TDP: 190 W
Outputs: 2x DVI
1x S-Video
Power Connectors: 2x 6-pin
Board Number: B790

Graphics Features

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


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Our review database contains 114 reviews of the Radeon HD 4890.

Retail boards based on this design

Name GPU Clock Memory Clock Other Changes
ASUS HD 4890 TOP 900 MHz 1000 MHz
Diamond HD 4890 XOC 925 MHz 1050 MHz 9.8 inches
HIS HD 4890 Fan Turbo 900 MHz 1000 MHz 9.69 inches
HIS HD 4890 Fan Turbo+ 965 MHz 1050 MHz 9.69 inches
MSI HD 4890 Cyclone SOC 1000 MHz 1000 MHz 1x DVI 1x HDMI 1x VGA
PowerColor HD 4890 LCS 900 MHz 1000 MHz
PowerColor HD 4890 PCS+ 950 MHz 975 MHz
Sapphire HD 4890 850 MHz 975 MHz
Sapphire HD 4890 Atomic 1000 MHz 1050 MHz
Sapphire HD 4890 New Edition 850 MHz 975 MHz 1x DVI 1x HDMI 1x DisplayPort
Sapphire HD 4890 Toxic 960 MHz 1050 MHz
Sapphire HD 4890 Vapor-X OC 870 MHz 1050 MHz 1x DVI 1x HDMI 1x DisplayPort 1x VGA
Sapphire HD 4890 Vapor-X OC 2 GB 870 MHz 1050 MHz 2048 MB, 1x DVI 1x HDMI 1x DisplayPort 1x VGA
VisionTek HD 4890 OC Edition 950 MHz 1050 MHz
XFX HD 4890 Black Edition 1000 MHz 1000 MHz