Lenovo T221 User Manual

Document version 1.0 

Page 1 

9/1/2004 

 
 

 

 
The primary consideration, for choosing either the T221 model DG3 or DG5 is the rate at which it is 
desired to display image changes. Internal frame buffers within the T221 ensure that the panel is always 
refreshed at a suitable rate (41Hz in the DG3, 41-48Hz in the DG5); however bandwidth and I/O 
considerations on the DVI interface mean that the frame buffers may be updated with new data at a 
slower rate. For many applications this isn’t an issue; however some applications require a higher rate so 
that motion or data changes are presented as quickly and smoothly as possible. 
 
The following table summaries the recommended T221 model and graphics card(s) depending on the 
preferred update rate. 
 

T221 

Image 

motion 

characteristic 

Typical Applications 

 

Minimum 

Screen Update

Rate 

Model

EDID

Firmware 

level 

IBM Supported 

Graphics Cards 

(NVIDIA) 

2D 

Office 

Applications 

Publishing 

Virtual 

Galleries & 

Museums 

Digital 

Photography 

13Hz DG3/5

29 

FX1100 
FX1300 

20Hz DG3/5

29 

FX1100 
FX1300 

3D 

Engineering 

& Modeling 

24Hz DG5

02 

FX3000 
FX3400 

Primarily 

static 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Smooth & 

life-like 

Video 

Image 

analysis 

(roaming, 

windowing, 

leveling) 

Video 

Creation 

48Hz DG5

06 

DG3 – 4.0 

 
 

DG5 – 4.3 

FX3000 
FX3400