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ATI Radeon HD 4890

RV790
Graphics Processor
800
Cores
40
TMUs
16
ROPs
1024 MB
Memory Size
GDDR5
Memory Type
256 bit
Bus Width
ATI Radeon HD 4890 Photo ATI RV790 Photo
The Radeon HD 4890 was a performance graphics card by ATI, launched in April 2009. Built on the 55 nm process, and based on the RV790 graphics processor, in its RV790 XT variant, the card supports DirectX 10.1. The RV790 graphics processor is an average sized chip with a die area of 282 mm² and 959 million transistors. It features 800 shading units, 40 texture mapping units and 16 ROPs. ATI has placed 1,024 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 850 MHz, memory is running at 975 MHz.
Being a dual-slot card, the ATI Radeon HD 4890 draws power from 2x 6-pin power connectors, with power draw rated at 190 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4890 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 241 mm in length, and features a dual-slot cooling solution. Its price at launch was 249 US Dollars.

Graphics Processor

GPU Name
RV790
GPU Variant
RV790 XT
(215-0758016)
Architecture
TeraScale
Process Size
55 nm
Transistors
959 million
Die Size
282 mm²

Graphics Card

Release Date
Apr 2nd, 2009
Generation
Radeon R700 HD 4800
Production Status
End-of-life
Launch Price
249 USD
Bus Interface
PCIe 2.0 x16

Relative Performance

9%
11%
13%
17%
20%
21%
26%
35%
35%
38%
40%
41%
47%
50%
54%
55%
58%
60%
64%
67%
68%
71%
73%
83%
84%
85%
87%
87%
88%
88%
94%
98%
100%
Radeon HD 4890
104%
104%
106%
107%
107%
107%
109%
114%
117%
125%
127%
127%
133%
133%
138%
147%
152%
153%
155%
156%
162%
163%
165%
167%
175%
179%
182%
182%
182%
183%
197%
199%
204%
206%
207%
209%
209%
213%
214%
220%
236%
242%
249%
250%
253%
255%
261%
268%
274%
281%
285%
285%
316%
347%
352%
376%
378%
383%
388%
391%
393%
399%
400%
402%
406%
428%
436%
442%
442%
486%
495%
503%
541%
594%
615%
662%
662%
699%
817%
838%
914%
1040%
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
850 MHz
Memory Clock
975 MHz
3900 MHz effective

Memory

Memory Size
1024 MB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
124.8 GB/s

Render Config

Shading Units
800
TMUs
40
ROPs
16
Compute Units
10

Theoretical Performance

Pixel Rate
13.60 GPixel/s
Texture Rate
34.00 GTexel/s
FP32 (float) performance
1,360 GFLOPS
FP64 (double) performance
272.0 GFLOPS (1:5)

Board Design

Slot Width
Dual-slot
Length
9.49 inches
241 mm
TDP
190 W
Outputs
2x DVI
1x S-Video
Power Connectors
2x 6-pin
Board Number
B790

Graphics Features

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

RV790 GPU Notes

Graphics/Compute: GFX3
Display Core Engine: 3.1
Unified Video Decoder: 2.0

Retail boards based on this design (15)

Name GPU Clock Memory Clock Other Changes
ASUS HD 4890 TOP 900 MHz 1000 MHz
Diamond HD 4890 XOC 925 MHz 1050 MHz 9.8 inches/249 mm
HIS HD 4890 Fan Turbo 900 MHz 1000 MHz 9.69 inches/246 mm
HIS HD 4890 Fan Turbo+ 965 MHz 1050 MHz 9.69 inches/246 mm
MSI HD 4890 Cyclone SOC 1000 MHz 1000 MHz 1x DVI 1x HDMI 1x VGA
PowerColor HD 4890 LCS 900 MHz 1000 MHz
PowerColor HD 4890 PCS+ 950 MHz 975 MHz
Sapphire HD 4890 850 MHz 975 MHz
Sapphire HD 4890 Atomic 1000 MHz 1050 MHz
Sapphire HD 4890 New Edition 850 MHz 975 MHz 1x DVI 1x HDMI 1x DisplayPort
Sapphire HD 4890 Toxic 960 MHz 1050 MHz
Sapphire HD 4890 Vapor-X OC 870 MHz 1050 MHz 1x DVI 1x HDMI 1x DisplayPort 1x VGA
Sapphire HD 4890 Vapor-X OC 2 GB 870 MHz 1050 MHz 2048 MB, 1x DVI 1x HDMI 1x DisplayPort 1x VGA
VisionTek HD 4890 OC Edition 950 MHz 1050 MHz
XFX HD 4890 Black Edition 1000 MHz 1000 MHz