The Spire all new Kepler universal micro-processor cooler series are direct contact heat-pipe solutions for Core i3/i5 and i7 from Intel and the AMD AM2/3/FM1 micro-processors. There are three (3) different models ranging from two up to four 6mm sinter powder heat-pipes which are in direct contact with the cpu heat-source, dissipating heat effectively and fast. The high density fins are crowned with a powerful fan for high airflow and great cooling performance. The 92mm dc fan provides ample airflow and silent cooling at 19.0dBA. Compatibility is ensured with the multi-platform mounting clip for Intel 775/1155/1156 sockets and AM2/AM3/FM1 micro-processors. The Kepler series from Spire are build to deliver great cooling for maximum system performance. Main Features: Up to Four 6mm all copper heat-pipes Heat-pipe direct CPU contact 50 high density dimpled fins Silent 92x25mm DC fan S420 Thermal compound included Secure & Tool-free installation 3 year manufacturer limited warranty Compatibility: The Kepler series are compatible with ATX and MICRO ATX platforms, Intel socket 775/1155/1156 &1366 sockets as well as AMD socket AM2/AM3/FM1 main-board sockets. MSRP: Kepler USD 19.95 / EURO 14.99 Kepler II USD 25.95 / EURO 18.99 Kepler Pro USD 38.95 / EURO 27.99 For more information, visit the product pages of Kepler Pro, Kepler II, and Kepler.