HP Vectra VEi7 Technical Reference Manual page 10

Processors
The heat sink is supplied with the processor, and is bolted to it by the
manufacturer. The processor is held in place by a retention mechanism.
Pentium II processors use either a Single Edge Contact Cartridge
(SECC) or a Single Edge Contact Cartridge 2 (SECC 2) packaging
technology. These packages allow the L2 cache to be tightly coupled to
the processor, while enabling the use of high volume commercial SRAM
components. The Pentium III comes in the SECC2 package only.
SECC package
10
Core Components and Technologies
Pentium Processor Packaging
(Single Edge Contact
Heat Sink ATXV2
Weight 237 g
Dissipation 40 W
Attach Locations Interfaces with thermal plate
Connector SC242
Heat Sink Clip Riv screws
SECC 2 package
(exploded view)
heatsink
SECC
(Single Edge Contact
Cartridge)
SECC2 Heat Sink
130 g
36 W
Substrate holes
SC242
SECC2 H/S clip
heatsink clips
SECC2
Cartridge 2)
processor