Intriguing. Looks very nice.
Couple of questions:
can the boards still stack easily with this back to back cooler arrangement?
can someone with some watercooling experience give me an idea of the BOM to cool 12 boards?
12x80 = 960W
It seems like a great idea but I'm worried it will prove expensive when you add in radiators, pumps, fans, reservoirs. Is this going to need £300 investment on top of the cooling blocks?
it honestly all depends on the waterblock price and number of boards your going to get..
Double 120mm Radiator - 100$
Pump - 80$ (Laing D5)
2 - 120mm Fans - 40$ (High static Pressure Fans) or 80$ if push pull config
Reservoir - 50 bucks
Fittings and Hoses - Depending on how many waterblocks you have, your looking at 2-5 dollars per fitting.. 6 boards is 12 fittings, plus 6 for pump, rad, reservoir.. These are the cheap fittings too.. If you get like nice fittings like monsoon your looking at 5-6 bucks EACH... 20 fittings would be 120 bucks alone...
Fluids - Distilled water or special additive. 20 bucks.
From the info I found googling around the PC cooling options, I don't thing a 120.2 is going to come close to dissipating 1kW which is what would be required for 12 boards with decent over clocking. Unless I'm very much mistaken to maintain a reasonable delta of 10 degrees in the loop I'd be looking at x3 120.3s or x2 120.4s. As I said, advice from an experienced water cooler that understands head dissipation, delta Ts, and fan/flow rates would be appreciated.
It's an example BOM for components other than the water blocks I'm interested in as we can order those with the boards.