CAC-SXHH4-U02 Detailed Features

Four is the number, not three, nor two, nary it be five, but it shall be four (in my worst Monte Python: Search for the Holy Grail reference). Xigmatek has experimented with the fourth heat-pipe in a few of the recent products, such as the HDT-SD964. There is a whole new dynamic put into place when you transition the footprint from three heat-pipe rods to four, and since the surface area of the CPU is finite the manufacturer must take care to design the contact surface to match the intended processor group.

If you look closely at the image below, you might notice that the mounting holes are not threaded. This is due to the reduced edge area that is left after a fourth 8-gauge heat-pipe rod has been added to the base.

Similar to the design we have seen in the Noctua NH-U12P, Xigmatek has utilized a staggered heat-pipe rod design in the Achilles S1284. The benefit to this design is that it allows the airflow to directly oppose the heat-pipe rod and draw heat away as it circulates past. More designs are including this technique, which has helped accomplish a very small margin of added performance.

Past heatsink fins have been rather square, with right angles at each corner. New in the Achilles S1284 are some rakish angles which help add just a small amount of additional surface area to radiate away thermal energy. So far, the CAC-SXHH4-U02 part number is the only one in the Xigmatek lineup to include this finsink design.

I was a big fan of the easy installation that came with the first HDT-S1283 design, despite the reduced contact pressure afforded to screw-type retaining brackets. The push-pin clip system returns with the Achilles S1284, as the added fourth heat-pipe rod reduces the screw size and mounting edge area. The push-pin clip system fits Intel LGA775 sockets, and a retaining clamp is used for AMD systems, making it easy to install while still offering good performance for users.

Achilles S1284 Features

• H.D.T. (Heat-pipe direct touch) technology
• Anti-vibration rubber design
• Transparent fan with colorful LED lights
• 4pcs Φ8mm high performance U type heat-pipes
• Light weight
• High performance & easy installation
• 120mm highly efficient PWM fan
• 3 in 1 application: LGA775 push-pin/K8 & AM2 tool-less clip.

CAC-SXHH4-U02 Specifications

• Product Name: Achilles S1284
• Product Number: CAC-SXHH4-U02
• Outside Dimension (W) x (H) x (D) mm 120 x 60 x 159
• Heat Sink Material: Aluminum Alloy
• Fan Dimension (W) x (H) x (D) mm 120 x 120 x 25
• Pulse Width Modulation (PWM) Fan
  • Voltage Rating (V) 12V
  • Speed (R.P.M.) 800~1500 R.P.M.
  • Bearing Type: Long Life Bearing
  • Air Flow (CFM) 61.375 CFM
  • Air Pressure (mm H2O) 1.516 mm H2O
  • Life Expectancy (hrs) 50,000 hrs
  • Noise Level (dB) 20.64 dBA
  • Connector 4 Pin with PWM
  • Weight (g) 660g (w/fan)

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