It’s a tower HSF with 5 heat pipes and a 92mm fan sandwich by the fins. It’s like a Tuniq 120 but not as powerful because of the Asus smaller fan. You must take out the motherboard to install it. Check the pics here…

Silent Square Series

Ultra Silent for Ultimate Performance

CPU Support
Intel® Core™2 Extreme/ Core™2 Duo/ Pentium® D (Dual-Core)
Intel® Pentium® 4 HT/Celeron® D
AMD Athlon™ 64 X2/ FX (Dual-Core)
AMD Athlon™ 64/Sempron™ CPU
Fan Speed 1,800 rpm with PWM control
Material Cu. Base + Dual-Side Al. Fins + 5 Heat Pipes