Used in great condition, Have 2 units, will sell for $55 for both. The mounting frame for a 3.5" hard drive is built into a free 5.25" bay. A display on the front alternately shows the temperature data from the two sensors that get placed inside the computer. The display can be switched between Celsius and Fahrenheit internally using a DIP switch. Two small 40 mm fans next to the metal frame provide cooling of the mounted hard drive. At a level of 45 degrees Celsius/113 Fahrenheit the LED's in the display start blinking. An acoustic signal would be better, but there is none with the Antec HD Cooler.

　　Once the PC starts up, the front panel alternates between showing the temperature of the drive and the case along with a small pair of LEDs to show which temperature is being displayed. Unfortunately, the instructions don't tell you which is which so you have to guess.

　　The front panel contains 2 40mm fans. These start at 4500rpm and increase to 5500 RPM linearly as the temperature rises above 30 degrees C.

　　The Antec HD Cooler was extremely quiet, you'd barely know it had any fans at all. The display on our test PC showed a case temperature of 43 degrees C with the drive running at 33 degrees C so clearly, the aluminium jacket and twin fans were working well. It was also useful to have a constant reminder of how warm the machine is, giving plenty of warning if things did start to warm up, perhaps on a hot summer's day.

　　A less obvious side effect of using something like the Antec HD Cooler is that it provides a new bay for your hard drive and for those who have a machine stuffed full of drives, this is a major bonus. Our test machine has all its drive cages filled and the drive tested here used to sit on the floor of the case, hardly ideal. Now it has its own cooled bay.

　　Features: Improved aluminum heatsink provides maximum heat dispersion. Supports IDE, SCSI, and Serial ATA high-speed hard drives. Two thermally-controlled, variable-speed 40mm fans deliver quiet cooling. Two built-in temperature sensors let you monitor hard drive and case temperatures. Digital temperature displays Celsius (C) or Fahrenheit (F) Materials: Aluminum alloy heatsink; ABS and PC fire resistant front panel Fan: 2x 40x40x20 mm fans Fan Speed: 4500 RPM upto 30C (86F); 5500 RPM at 40C (104F) Display: 0C (32F) ~ 100C (212F) 2% LED blinks if temperature >45C (113F) Display toggles every 3 seconds between case and HDD temperatures Dimension: 7.25 x 5.75 x 1.6 inch / 18.4 x 14.6 x 14.2 cm Weight: 1.21 lbs / 540 g