ATI Mobility Radeon HD 3850 vs ATI Radeon X850 XT AGP

Table of Contents

Graphics Processor

GPU model M88 R481
Architecture TeraScale R400
Manufacturing process 55 nm 130 nm
Number of transistors 666 million 160 million
Die size 192 mm² 297 mm²
GPU variant R481 XT (215RAFCGA11F)

Mobile graphics

Release date Jun 4th, 2008
Generation M8x (Mobility HD 3800)
Production End-of-life
Interface PCIe 2.0 x16
Reviews 2 in our database
Predecessor M7x
Successor M9x


GPU clock 580 MHz 520 MHz
Memory clock 750 MHz 1500 Mbps effective 540 MHz 1080 Mbps effective

Memory Configuration

Memory size 512 MB 256 MB
Memory type GDDR3 GDDR3
Memory bus width 256 bit 256 bit
Bandwidth 48.00 GB/s 34.56 GB/s

Render Configuration

Shading units 320
TMUs 16 16
ROPs 16 16
Compute units 4
Cache L2 256 KB
Pixel shaders 16
Vertex shaders 6


Pixel rate 9.280 GPixel/s 8.320 GPixel/s
Texture rate 9.280 GTexel/s 8.320 GTexel/s
FP32 (float) performance 371.2 GFLOPS
FP64 (double) performance 74.24 GFLOPS (1:5)
Vertex rate 780.0 MVertices/s

Dimensions & Outputs

TDP 35 W 69 W
Outputs No outputs 1x DVI1x VGA1x S-Video
Slot width Dual-slot
Suggested PSU 250 W
Power connectors 1x Molex

API Support & Features

DirectX 10.1 (10_1) 9.0b (9_2)
OpenGL 3.3 2.1
Shader model 4.1
Pixel shader 2.0b
Vertex shader 2.0b

Other Features

Graphics Card

Release date Feb 28th, 2005
Generation Radeon R400 AGP
Production End-of-life
Interface AGP 8x
Reviews 58 in our database
Predecessor Radeon R300
Successor Radeon R500 AGP


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