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ATI Radeon HD 3850 X2

ATI Radeon HD 3850 X2 Image ATI RV670 Image
The Radeon HD 3850 X2 was a performance graphics card by ATI, launched in April 2008. 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. Radeon HD 3850 X2 combines two graphics processors to increase performance. It features 320 shading units, 16 texture mapping units and 16 ROPs per GPU. ATI has placed 1,024 MB GDDR3 memory on the card, which are connected using a 256-bit memory interface per GPU (each GPU manages 512 MB). The GPU is operating at a frequency of 669 MHz, memory is running at 828 MHz.
We recommend the ATI Radeon HD 3850 X2 for gaming with highest details at resolutions up to, and including, 1680x1050.
Being a dual-slot card, its power draw is rated at 140 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 3850 X2 is connected to the rest of the system using a PCIe 2.0 x16 interface. The card measures 267 mm in length, and features a dual-slot cooling solution. Its price at launch was 349 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: Apr 4th, 2008
Production Status: End-of-life
Launch Price: 349 USD
Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 669 MHz
Memory Clock: 828 MHz
1656 MHz effective


Memory Size: 512 MB x2
Memory Type: GDDR3
Memory Bus: 256 bit x2
Bandwidth: 53.0 GB/s x2

Render Config

Shading Units: 320 x2
TMUs: 16 x2
ROPs: 16 x2
Compute Units: 4 x2
Pixel Rate: 10.70 GPixel/s x2
Texture Rate: 10.70 GTexel/s x2
Floating-point performance: 428.2 GFLOPS x2

Board Design

Slot Width: Dual-slot
Length: 10.5 inches
267 mm
TDP: 140 W
Outputs: 2x DVI
1x S-Video

Graphics Features

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


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Our review database contains 1 reviews of the Radeon HD 3850 X2.

Retail boards based on this design

Name GPU Clock Memory Clock Other Changes
ASUS ROG HD 3850 X2 669 MHz 828 MHz