The TaiSol heatsink (Socket-A & Socket-370 Cooler roundup, Nov 2000) is ideal for fitting an 80 mm fan. Viewed from the top it measures 60x80, and the fins are easily spread (fan them out!) to 80x80mm.
The airflow of a fan mounted hard against the fins is always compromised by the shielding effect of the fan motor.Thus I folded a short 30 mm aluminium "coupler" so the air flow from the fan (YStech 80mm,3500rpm, 37 cuft) could stabilise as it travelled the 30mm, and converge as it passed round the motor. The coupler forms a short tube of x section 80x80 fitted on top of the heatsink. The fan blows through the coupler, down into the fins.
I have this setup on my VP6 dual PIII (700, o/c to 1003MHz, 1.85v)When the PIII's idle, VP6 reports cpu at ambient* +0 to1 degree C and at 100%cpu, ambient +6 or 7 degrees C. The 3500 rpm fans are quiet.(cf. Delta which runs at 7000rpm!)I would guess this outperforms the copper Hedgehog, is much lighter and also very cheap!
NB axial fans generate very low air pressure (about 3 or 4 mm of water) To move lots of air through a resistance (the fins) you really need a centrifugal blower (my car heater has one) but also Very noisy. Enthusiasts could try stacking 2 axial fans in series......
* ambient is that relative to cpu; ie case temperature, not room temp.
The airflow of a fan mounted hard against the fins is always compromised by the shielding effect of the fan motor.Thus I folded a short 30 mm aluminium "coupler" so the air flow from the fan (YStech 80mm,3500rpm, 37 cuft) could stabilise as it travelled the 30mm, and converge as it passed round the motor. The coupler forms a short tube of x section 80x80 fitted on top of the heatsink. The fan blows through the coupler, down into the fins.
I have this setup on my VP6 dual PIII (700, o/c to 1003MHz, 1.85v)When the PIII's idle, VP6 reports cpu at ambient* +0 to1 degree C and at 100%cpu, ambient +6 or 7 degrees C. The 3500 rpm fans are quiet.(cf. Delta which runs at 7000rpm!)I would guess this outperforms the copper Hedgehog, is much lighter and also very cheap!
NB axial fans generate very low air pressure (about 3 or 4 mm of water) To move lots of air through a resistance (the fins) you really need a centrifugal blower (my car heater has one) but also Very noisy. Enthusiasts could try stacking 2 axial fans in series......
* ambient is that relative to cpu; ie case temperature, not room temp.
nice!
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