Sapphire HD 3850 1 GB

100249L

Graphics Processor

RV670

Cores

320

TMUs

ROPs

Memory Size

1024 MB

Memory Type

DDR2

Bus Width

256 bit

GPU

Graphics Processor

GPU Name: RV670

GPU Variant: RV670 PRO
(215-0708003)

Architecture: TeraScale

Foundry: TSMC

Process Size: 55 nm

Transistors: 666 million

Density: 3.5M / mm²

Die Size: 192 mm²

Chip Package: FCBGA-1281

Graphics Card

Release Date: Nov 19th, 2007

Generation: Radeon R600
(HD 3800)

Predecessor: Radeon R500 PCIe

Successor: Radeon R700

Production: End-of-life

Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 668 MHz

Memory Clock: ~~830 MHz~~
500 MHz (-40%)
~~1660 Mbps effective~~
1000 Mbps effective

Memory

Memory Size: ~~512 MB~~
1024 MB

Memory Type: ~~GDDR3~~
DDR2

Memory Bus: 256 bit

Bandwidth: ~~53.12 GB/s~~
32.00 GB/s

Render Config

Shading Units: 320

TMUs: 16

ROPs: 16

Compute Units: 4

L2 Cache: 256 KB

Theoretical Performance

Pixel Rate: 10.69 GPixel/s

Texture Rate: 10.69 GTexel/s

FP32 (float): 427.5 GFLOPS

FP64 (double): 85.50 GFLOPS (1:5)

Board Design

Slot Width: Single-slot

TDP: 75 W

Suggested PSU: 250 W

Outputs: 2x DVI
1x S-Video

Power Connectors: 1x 6-pin

Board Number: 109-B34031-00B,
B400

Graphics Features

DirectX: 10.1 (10_1)

OpenGL: 3.3 (full)
4.0 (partial)

OpenCL: N/A

Vulkan: N/A

Shader Model: 4.1

RV670 GPU Notes

Mobile Variant: M88
Codename: Boom
Graphics/Compute: GFX3
Display Core Engine: 2.0
Unified Video Decoder: 1.0

RV670 Chip Numbers:
RV670 XT (215-0708017)
RV670 XTX ES (215-0708001)

Other retail boards based on this design (11)

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	209 mm/8.2 inches
ASUS HD 3850 Splendid Magic	668 MHz	828 MHz	Dual-slot
ASUS HD 3850 TOP	730 MHz	950 MHz	209 mm/8.2 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