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ATI Radeon HD 3850

ATI Radeon HD 3850 Image ATI RV670 Image
The Radeon HD 3850 was a mid-range graphics card by ATI, launched in November 2007. Built on the 55 nm process, and based on the RV670 graphics processor, in its RV670 PRO variant, the card supports DirectX 10.1. The RV670 graphics processor is an average sized chip with a die area of 192 mm² and 666 million transistors. It features 320 shading units, 16 texture mapping units and 16 ROPs. ATI has placed 512 MB GDDR3 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 668 MHz, memory is running at 830 MHz.
We recommend the ATI Radeon HD 3850 for gaming with highest details at resolutions up to, and including, 1280x720.
Being a single-slot card, the ATI Radeon HD 3850 draws power from 1x 6-pin power connectors, with power draw rated at 75 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 3850 is connected to the rest of the system using a PCIe 2.0 x16 interface. The card measures 208 mm in length, and features a single-slot cooling solution. Its price at launch was 179 US Dollars.

Graphics Processor

GPU Name: RV670
GPU Variant: RV670 PRO
Architecture: TeraScale
Process Size: 55 nm
Transistors: 666 million
Die Size: 192 mm²

Graphics Card

Released: Nov 19th, 2007
Production Status: End-of-life
Launch Price: 179 USD
Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 668 MHz
Memory Clock: 830 MHz
1660 MHz effective


Memory Size: 512 MB
Memory Type: GDDR3
Memory Bus: 256 bit
Bandwidth: 53.1 GB/s

Render Config

Shading Units: 320
TMUs: 16
ROPs: 16
Compute Units: 4
Pixel Rate: 10.69 GPixel/s
Texture Rate: 10.69 GTexel/s
Floating-point performance: 427.5 GFLOPS

Board Design

Slot Width: Single-slot
Length: 8.2 inches
208 mm
TDP: 75 W
Outputs: 2x DVI
1x S-Video
Power Connectors: 1x 6-pin
Board Number: B340, B400

Graphics Features

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


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Our review database contains 71 reviews of the Radeon HD 3850.

Retail boards based on this design

Name GPU Clock Memory Clock Other Changes
ASUS HD 3850 Magic 669 MHz 400 MHz DDR2
ASUS HD 3850 OC Gear 669 MHz 829 MHz 8.21 inches
ASUS HD 3850 Splendid Magic 668 MHz 828 MHz Dual-slot
ASUS HD 3850 TOP 730 MHz 950 MHz 8.21 inches
Diamond Viper HD 3850 Ruby Edition 725 MHz 900 MHz Dual-slot
PowerColor HD 3850 Xtreme 720 MHz 900 MHz GDDR4, 1x DVI 1x HDMI 1x S-Video
Sapphire HD 3850 1 GB 668 MHz 500 MHz 1024 MB, DDR2
Sapphire HD 3850 1 GB 702 MHz 828 MHz 1024 MB
Sapphire HD 3850 256 MB 668 MHz 830 MHz 256 MB
Sapphire HD 3850 512 MB 668 MHz 830 MHz DDR2
Sapphire HD 3850 Ultimate 669 MHz 829 MHz