It looks to me that there is a heat sink that rides in and that clamp goes ontop of it to hold it down. Atleast thats what my older mother board did until i just upgraded to an ASUS board. 
-Jason
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1997 camaro Z28 30th anniversary edition T-tops, M6, fully forged 355, Ported stock heads, Gm847, Pacesetter ceramic coated long tubes, ORY, Magnaflow Cat back, Comp Cams 1.6r's, GMHP guide plates, Comp Cam chromoly pushrods, 10 degree locks and seats, 918 valve springs, P&P stock heads, Lou's short stick, MBA Z28 shift knob, Clear corners,
2001 Grand Cherokee Limited 4.7L v8 H.O quadradrive, Leather, sun roof, interior cold cathods
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