HIS HD 4870 IceQ 4+ Turbo

H487QT512P

Graphics Processor

RV770

Cores

800

TMUs

ROPs

Memory Size

512 MB

Memory Type

GDDR5

Bus Width

256 bit

GPU

Top

Bottom

Back

Graphics Processor

GPU Name: RV770

GPU Variant: RV770 XT
(215-0669049)

Architecture: TeraScale

Foundry: TSMC

Process Size: 55 nm

Transistors: 956 million

Density: 3.7M / mm²

Die Size: 256 mm²

Chip Package: HFCBGA-1492

Graphics Card

Release Date: Jun 25th, 2008

Generation: Radeon R700
(HD 4800)

Predecessor: Radeon R600

Successor: Evergreen

Production: End-of-life

Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: ~~750 MHz~~
780 MHz (+4%)

Memory Clock: ~~900 MHz~~
1000 MHz (+11%)
~~3.6 Gbps effective~~
4 Gbps effective

Memory

Memory Size: 512 MB

Memory Type: GDDR5

Memory Bus: 256 bit

Bandwidth: ~~115.2 GB/s~~
128.0 GB/s

Render Config

Shading Units: 800

TMUs: 40

ROPs: 16

Compute Units: 10

L1 Cache: 16 KB (per CU)

L2 Cache: 256 KB

Theoretical Performance

Pixel Rate: ~~12.00 GPixel/s~~
12.48 GPixel/s

Texture Rate: ~~30.00 GTexel/s~~
31.20 GTexel/s

FP32 (float): ~~1,200 GFLOPS~~
1,248 GFLOPS

FP64 (double): ~~240.0 GFLOPS~~
249.6 GFLOPS (1:5)

Board Design

Slot Width: Dual-slot

Length: 241 mm
9.5 inches

Width: 111 mm
4.4 inches

Height: 40 mm
1.6 inches

TDP: 150 W

Suggested PSU: 450 W

Outputs: 2x DVI
1x S-Video

Power Connectors: 2x 6-pin

Board Number: 109-B50731-10

Graphics Features

DirectX: 10.1 (10_1)

OpenGL: 3.3

OpenCL: 1.1

Vulkan: N/A

Shader Model: 4.1

RV770 GPU Notes

Mobile Variant: M98
Codename: Wekiva
Graphics/Compute: GFX3
Display Core Engine: 3.1
Unified Video Decoder: 2.0

Other retail boards based on this design (17)

Name	GPU Clock	Memory Clock	Other Changes
ASUS HD 4870 DK TOP	815 MHz	925 MHz
ASUS HD 4870 TOP	815 MHz	925 MHz
ASUS ROG Matrix HD 4870	770 MHz	920 MHz
HIS HD 4870 IceQ 4+ Turbo	780 MHz	1000 MHz
HIS HD 4870 IceQ 4+ Turbo 1 GB	770 MHz	1000 MHz	1024 MB
HIS HD 4870 Turbo	780 MHz	1000 MHz
Palit HD 4870 Sonic Dual	775 MHz	1000 MHz	1x DVI 1x HDMI 1x DisplayPort 1x VGA
Palit HD 4870 Sonic Dual	775 MHz	1000 MHz	2x DVI 1x DisplayPort
PowerColor HD 4870 LCS	800 MHz	950 MHz	Single-slot
Sapphire HD 4870 Toxic	780 MHz	1000 MHz
Sapphire HD 4870 Toxic 1 GB	780 MHz	1000 MHz	1024 MB, 1x DVI 1x HDMI 1x VGA
Sapphire HD 4870 Vapor-X 1 GB	750 MHz	900 MHz	1024 MB, 1x DVI 1x HDMI 1x VGA
Sapphire HD 4870 Vapor-X 2 GB	750 MHz	900 MHz	2 GB, 1x DVI 1x HDMI 1x VGA
XFX HD 4870	750 MHz	900 MHz	2x DVI
XFX HD 4870 1 GB	750 MHz	900 MHz	1024 MB
XFX HD 4870 XXX	775 MHz	950 MHz
XFX HD 4870 XXX 1 GB	775 MHz	950 MHz	1024 MB