Pentium II CPU Fans

[xaigi]

How do I determine whether a CPU is Secc-1 or Secc-2? How do I determine whether a fan is secc-1 or secc-2 and whether the fan will fit the CPU?

-Jonathan

 

[vss1980]

OK, it is fairly easy to determine the type as long as you know what to look for.

I'll start with SECC 2 type first.
These have 4 holes on the side of the chip opposite to the heatsink. On retail chips these holes are filled with a retaining clip used to keep the heatsink and fan attached. On OEM versions with OEM heatsinks, this may be different and the heatsink unit is usually a large heatsink with 4 large pins that poke through the holes in the PII chip and come out of the other side of the chip and use a retaining clip or plate of metal to hold the heatsink on.

To remove the OEM heatsink you usually simply slide off the clips or plate that hold the 4 pins, and pull the heatsink and chip apart. Both should seperate easily.
With the retail units, the clips are harder to remove. There was an article that described this at site.

SECC 1 chips are a little different. For starters the construction is different. The heatsink doesnt actually touch the chip itself, but contacts a heat-plate that is attached to the CPU. This makes the heatsink design rather different.
Some of the various design used metal retainer clips which you simply unlock and the heatsink comes off. Others have simple leavers which you flip over and release the heatsink.
Unlike the SECC2 method of clipping the heatsink to the physical chip cartridge, the SECC1 method is to just clip the heatsink to the heatplate.

Hope this helps a bit.

The new heatsink and fan unit will have to be the right type. Due to construction of the chip cartridge and heatsinks, the two types are not compatible.