ATI RV770

RV770

RV770 XT Mac

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Die Shot

Block Diagram

ATI's RV770 GPU uses the TeraScale architecture and is made using a 55 nm production process at TSMC. With a die size of 256 mm² and a transistor count of 956 million it is a medium-sized chip. RV770 supports DirectX 10.1 (Feature Level 10_1). For GPU compute applications, OpenCL version 1.1 can be used. It features 800 shading units, 40 texture mapping units and 16 ROPs.

Further reading: R700 Series Instruction Set Architecture

Graphics Processor

Released: Jun 25th, 2008

GPU Name: RV770

Mobile Variant: M98

Codename: Wekiva

Architecture: TeraScale

Foundry: TSMC

Process Size: 55 nm

Transistors: 956 million

Density: 3.7M / mm²

Die Size: 256 mm²

Package: HFCBGA-1492

Graphics Features

DirectX: 10.1 (10_1)

OpenGL: 3.3

OpenCL: 1.1

Vulkan: N/A

Shader Model: 4.1

WDDM: 1.1

Compute: GFX3

DCE: 3.1

UVD: 2.0

Render Config

Shading Units: 800

TMUs: 40

ROPs: 16

Compute Units: 10

Z-Stencil: 64

L1 Cache: 16 KB per CU

L2 Cache: 256 KB

Max. TDP: 151 W

All TeraScale GPUs

ATI GPU Architecture History

2009-2015 TeraScale 2
2005-2013 TeraScale
2005-2007 Ultra-Threaded SE
2004-2008 R400
2002-2008 R300
2001-2006 Rage 7
2000 Rage 5
2000-2007 Rage 6
1999-2001 IBM
1998-1999 Rage 4
1997 Rage 2
1997-1999 Rage 3
1992-1997 Mach
1986-1992 Wonder

Graphics cards using the ATI RV770 GPU

Name	Chip	Memory	Shaders	TMUs	ROPs	GPU Clock	Memory Clock
ATI Radeon HD 4870	RV770 XT	512 MB	800	40	16	750 MHz	900 MHz
ATI Radeon HD 4830	RV770 LE	512 MB	640	32	16	575 MHz	900 MHz
ATI Radeon HD 4730	RV770 CE	512 MB	640	32	8	750 MHz	900 MHz
ATI Radeon HD 4850	RV770 PRO	512 MB	800	40	16	625 MHz	993 MHz
ATI FirePro V8700	RV770 XT	1024 MB	800	40	16	750 MHz	850 MHz
ATI FirePro V8750	RV770 XT	2 GB	800	40	16	750 MHz	900 MHz
ATI FirePro V8700 Duo	RV770 XT	1024 MB	800	40	16	750 MHz	850 MHz
ATI FirePro V7770	RV770 XT	1024 MB	800	40	8	625 MHz	1050 MHz
ATI FirePro V7760	RV770 XT	1024 MB	800	40	8	750 MHz	850 MHz
ATI Radeon HD 4810	RV770 CE	512 MB	640	32	8	625 MHz	900 MHz
ATI Radeon HD 4870 Mac Edition	RV770 XT Mac	512 MB	800	40	16	750 MHz	850 MHz
ATI Radeon HD 4855	RV770 PRO	512 MB	640	32	16	575 MHz	900 MHz