HIS HD 3870 IceQ 3 Turbo

H387Q512N

Graphics Processor

RV670

Cores

320

TMUs

ROPs

Memory Size

512 MB

Memory Type

GDDR4

Bus Width

256 bit

GPU

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~~
850 MHz (+9%)

Memory Clock: ~~1126 MHz~~
1190 MHz (+6%)
~~2.3 Gbps effective~~
2.4 Gbps effective

Memory

Memory Size: 512 MB

Memory Type: GDDR4

Memory Bus: 256 bit

Bandwidth: ~~72.06 GB/s~~
76.16 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~~
13.60 GPixel/s

Texture Rate: ~~12.43 GTexel/s~~
13.60 GTexel/s

FP32 (float): ~~497.3 GFLOPS~~
544.0 GFLOPS

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

Board Design

Slot Width: Dual-slot

Length: 241 mm
9.5 inches

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