Sapphire HD 3870

100225L

Graphics Processor

RV670

Cores

320

TMUs

ROPs

Memory Size

512 MB

Memory Type

GDDR4

Bus Width

256 bit

GPU

PCB Front

PCB Back

Graphics Processor

GPU Name: RV670

GPU Variant: RV670 XT
(215-0708005)

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: 777 MHz

Memory Clock: 1126 MHz
2.3 Gbps effective

Memory

Memory Size: 512 MB

Memory Type: GDDR4

Memory Bus: 256 bit

Bandwidth: 72.06 GB/s

Render Config

Shading Units: 320

TMUs: 16

ROPs: 16

Compute Units: 4

L2 Cache: 256 KB

Theoretical Performance

Pixel Rate: 12.43 GPixel/s

Texture Rate: 12.43 GTexel/s

FP32 (float): 497.3 GFLOPS

FP64 (double): 99.46 GFLOPS (1:5)

Board Design

Slot Width: Dual-slot

TDP: 106 W

Suggested PSU: 300 W

Outputs: 2x DVI
1x S-Video

Power Connectors: 1x 6-pin

Board Number: 109-B33931-00

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 3870 Magic	777 MHz	855 MHz	GDDR3, 229 mm/9 inches, Single-slot
ASUS HD 3870 TOP	851 MHz	1143 MHz	229 mm/9 inches, Single-slot
Diamond Viper HD 3870 Ruby Edition	850 MHz	950 MHz	1024 MB, GDDR3, 229 mm/9 inches
Diamond Viper HD 3870 Ruby Edition	820 MHz	1200 MHz	229 mm/9 inches
HIS HD 3870 IceQ 3 Turbo	850 MHz	1190 MHz
Sapphire HD 3870	777 MHz	1126 MHz
Sapphire HD 3870 Atomic	825 MHz	1200 MHz	Single-slot
Sapphire HD 3870 Toxic II	800 MHz	1152 MHz	Single-slot
Sapphire HD 3870 Ultimate	800 MHz	1152 MHz	Single-slot
Sapphire HD 3870 Vapor-X	800 MHz	1100 MHz	1024 MB, Single-slot
VisionTek HD 3870	777 MHz	1126 MHz	GDDR3, Single-slot