Upon closer inspection of the Card Cooler XT, I noticed that the color and sturdiness of its frames was different from the original Card Cooler. As it turns out, the designs for Card Coolers were slightly modified. For one, the metal frame that holds the fans is now made with anodized 18 gauge aircraft grade aluminum. As for other improvements made on the Card Cooler, I've made a handy little chart. Enlarge Notice that the fan type is now ball bearing instead of the original's sleeve bearing.
Ball bearing fans have better reliability and longer life than sleeve bearing fans.
The XT's fans also have a slightly lower RPM to keep the noise level down, which is a definite plus. As you can see from the chart, the XT's not that much louder than the original. With a theoretical air volume movement of 138 CFM, the XT has double the CFM that the original has. Even though there are bigger fans in this unit, it still only uses a total of 4.8 Watts - not that much more than the original again. Finally, and probably most note worthy, the XT comes with a Lifetime Warranty.