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ATI Radeon HD 4770

RV740
Graphics Processor
640
Cores
32
TMUs
16
ROPs
512 MB
Memory Size
GDDR5
Memory Type
128 bit
Bus Width
ATI Radeon HD 4770 Photo ATI RV740 Photo
The Radeon HD 4770 was a mid-range graphics card by ATI, launched in April 2009. Built on the 40 nm process, and based on the RV740 graphics processor, in its RV740 XT variant, the card supports DirectX 10.1. The RV740 graphics processor is an average sized chip with a die area of 137 mm² and 826 million transistors. It features 640 shading units, 32 texture mapping units and 16 ROPs. ATI has placed 512 MB GDDR5 memory on the card, which are connected using a 128-bit memory interface. The GPU is operating at a frequency of 750 MHz, memory is running at 800 MHz.
Being a dual-slot card, the ATI Radeon HD 4770 draws power from 1x 6-pin power connectors, with power draw rated at 80 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4770 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 203 mm in length, and features a dual-slot cooling solution. Its price at launch was 109 US Dollars.

Graphics Processor

GPU Name
RV740
GPU Variant
RV740 XT
(215-0727019)
Architecture
TeraScale
Process Size
40 nm
Transistors
826 million
Die Size
137 mm²

Graphics Card

Release Date
Apr 28th, 2009
Generation
Radeon R700 HD 4700
Production Status
End-of-life
Launch Price
109 USD
Bus Interface
PCIe 2.0 x16

Relative Performance

13%
17%
21%
27%
32%
34%
42%
54%
55%
60%
63%
65%
74%
79%
84%
87%
91%
94%
100%
Radeon HD 4770
105%
108%
111%
115%
131%
132%
135%
136%
137%
138%
139%
147%
155%
157%
163%
164%
166%
168%
168%
168%
172%
180%
184%
197%
200%
200%
209%
209%
217%
232%
239%
240%
244%
246%
254%
257%
259%
264%
276%
281%
286%
286%
287%
288%
311%
313%
321%
325%
326%
329%
330%
336%
336%
346%
372%
382%
391%
394%
398%
402%
411%
422%
432%
442%
448%
449%
497%
547%
554%
592%
595%
603%
611%
616%
619%
628%
630%
633%
639%
673%
687%
696%
696%
765%
779%
792%
851%
935%
968%
1043%
1043%
1100%
1287%
1320%
1439%
1637%
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
750 MHz
Memory Clock
800 MHz
3200 MHz effective

Memory

Memory Size
512 MB
Memory Type
GDDR5
Memory Bus
128 bit
Bandwidth
51.20 GB/s

Render Config

Shading Units
640
TMUs
32
ROPs
16
Compute Units
8

Theoretical Performance

Pixel Rate
12.00 GPixel/s
Texture Rate
24.00 GTexel/s
FP32 (float) performance
960.0 GFLOPS
FP64 (double) performance
192.0 GFLOPS (1:5)

Board Design

Slot Width
Dual-slot
Length
8 inches
203 mm
TDP
80 W
Outputs
2x DVI
1x S-Video
Power Connectors
1x 6-pin
Board Number
B743

Graphics Features

DirectX
10.1
OpenGL
3.3
OpenCL
1.1
Vulkan
N/A
Shader Model
4.1

RV740 GPU Notes

Graphics/Compute: GFX3
Display Core Engine: 3.2
Unified Video Decoder: 2.2

Retail boards based on this design (1)

Name GPU Clock Memory Clock Other Changes
ASUS HD 4770 Formula 750 MHz 800 MHz Single-slot, 1x DVI 1x HDMI 1x VGA