Wouldn't that potentially short the drains of the two FETs? I reckon that's a bad thing. How do you ensure insulation if you mount your FETs like that. Thermal grease?
Cheers,
Florian
//EDIT
HERP DERP, confused drain with source. The metal part of the TO-247AC is connected to the drain but those are connected anyway. Forget I asked this question.
If you dont want electrical connection you need to make sure that the past of fet #1 does not hit the metal or paste of fet #2 .
This is discribed in the artic silver guide / manual for this product.
I did some thermal calculations and you can put around 115W in the mosfet and get a junction temp of 170 deg c. (175 max) so one fet would be enough for one cpu cooler.
example:
90W from psu (30V , 3A )
The 1 ohm resistor will drop 3V ( 1 ohm *3 A )
So the mosfet gets 27V and 3A (81W)
Rt j-c = 0.75 max
Rt c-h = 0.24 min
Rt h-a = 0.3 typ. - fan on high Freezer 7 pro
(calculated from some results on the internet , seems to give around the same number)
so Rth (j-a) is ~1.3 deg. C / W
Temp ambient = 21 deg. C/W
This all results in a junction temp of 126.3 deg. C. (175 max)
It all depends on how fast the heat pipes can transfer the heat but i'm guessing its kinda instant.
If my calculations are correct in real life you would only use one mosfet per cpu heatsink because it can utilize it fully.
gr.spikee