IT Library

8/12/10

LCD Shopping Tips

LCD Shopping Best Practices

You’ll run across a lot of jargon when shopping for an LCD in today’s market. It may seem like gibberish, however the terms used offer pertinent information regarding the display’s performance and purpose. To aid in your pursuit of finding the perfect LCD, consider the following breakdown of terminology and key specifications.

Brightness or Luminance

This rating is stated as cd/m2 (candelas per square meter) and describes the level of light a display emits. In general, 300 cd/m2 is fine, but for video or production work, you’ll find a higher brightness rating is preferred. But, if you plan to sit in front of a display for long periods of time, you may want to turn down the brightness to 300 cd/m2 or below.

Contrast Ratio

The difference in luminance between a monitor’s brightest and darkest possible output is its contrast ratio. Comparing contrast ratios between competing displays accurately is difficult at best as manufacturers use varying measures of calculating contrast ratio. The best way to compare two displays is to look at them side to side.

Response Time

Response Time is the amount of time in milliseconds that it takes for a pixel to go from black to white and back to black again. The lower the number, the better. Pixel response time is key for fast action video games or watching movies. Unfortunately, comparing different manufacturers claims for response time is difficult due to varying measurement methods. Generally speaking, most displays built today are fast enough for all but the most hard-core gamers and production editors.

Aspect Ratio

Widescreen displays with 16:10 aspect ratios are now the norm, replacing the standard aspect ratio of 4:3. For daily computer use, whether office or home, the widescreen format allows extra horizontal space for applications and windows. The widescreen format also allows for a more cinematic experience when watching movies or playing games.

HDMI

High Definition Multimedia interface, or HDMI, is a connector that uses a single cable to carry digital video and audio signals from HD cable and satellite receivers. Most computers are not HDMI-capable, but HDMI is backward-compatible with DVI.

Rotating Screen

Computer screens are almost always wider than they are tall. This default landscape mode works best most of the time, enabling you to view multiple windows side by side. Occasionally, a taller, narrower screen may be preferable for reading manuscripts, information display or for point-of-sale purposes. For these situations, a display that can rotate (or pivot) from landscape to portrait orientation can come in very handy.

I recommend doing your research ahead of time, prior to being mauled by overzealous Best Buy employees etc. Use the information above as a way of setting a benchmark for alternatives you may be considering. Remember, it’s a buyer’s market and prices will only come down over time. Happy hunting.

Contact a Guidon representative today for further information and tips on shopping for your perfect LCD.

Category: IT Library

6/15/10

Data Center Optimization with Blade Servers

One way to address the problems associated with server sprawl is through physical consolidation. Through physical consolidation, an organization reduces the total number of servers in use by merging the workload onto fewer servers.

Organizations are able to make more efficient use of their computing resources, not to mention free up data center space, reduce power and cooling costs, and reduce complexity to make management easier.

Blade Servers

The use of blade servers in the data center is one approach to physical consolidation. Blade servers are different than traditional rack-mount servers. Blade systems are built with a modular infrastructure that can share many resources with fewer components. Unlike rack-mount servers, blades do not have their own power supplies or fans.

Rather, they share these components with other blades in a chassis that they all reside in. Another key difference is that blades do not have traditional input connections that can be found on the back of a rack-mount server. Communication is performed through the chassis mid-plane, which interconnects all of the blades to the chassis.

Blade Benefits

Blade servers offer many benefits of physical consolidation within the data center. Their consolidated design is more affordable to purchase and maintain than traditional rack-mount servers. Less rack space is used, and blades offer an almost 20 percent reduction in server airflow and close to a 30 percent power savings over traditional servers. With some manufacturers, up to 16 blades can fit into a 10U rack space. That’s quite a space savings compared to the traditional 1U “pizza box” servers of the past. Blade deployment is also much easier. Blade servers can be set up in minutes. And best of all, the IT team can add resources to the blade setup without having to rewire the entire rack.

Blade servers may not be a good fit for every situation. If an organization is only looking to replace one to three servers, blades are probably not appropriate. Or if an organization’s storage needs are great and there is no budget for a centralized storage system, then rack-mount servers may be a better fit given their greater internal storage space.