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So this is certainly an interesting idea, and FSP does have one or more PSUs with 12+<insert obscure voltage here> for PoE, but those have relatively low efficiency. AFAIK, they're not working on anything better in that field either, but it wouldn't hurt to ask. Maybe one of their designs can be modified relatively easily to output 19V instead of 53V on one rail.I think the specs you listed are fine and 150mm is a must, but first, you should get the highest voltage you possibly can and for the highest efficiency as well. 40mm fans get loud, even in good PSUs like the SSP300 and the FSP400 (which are both 80+ Gold). The first quiet Flex PSU I ever used was the FSP500-50FSPT, apart from one that I fitted an 80mm fan to, so that is a very huge issue to overcome.And second, consider that you might as well let FSP design a completely custom PSU (including form factor) if it's just for one case. The biggest issue, as others have said, would be to get enough orders for your case/the standalone PSU to fulfil FSPs MOQ for a custom design. I reckon that might be a bit higher than the 300 they ask for modified designs. Your best bet would be to make a case like this for a big retailer that sells pre-built systems to get the MOQ going an then sell leftovers to enthusiasts. Problem there is that you'd have to invest an awful lot of money up-front.
So this is certainly an interesting idea, and FSP does have one or more PSUs with 12+<insert obscure voltage here> for PoE, but those have relatively low efficiency. AFAIK, they're not working on anything better in that field either, but it wouldn't hurt to ask. Maybe one of their designs can be modified relatively easily to output 19V instead of 53V on one rail.
I think the specs you listed are fine and 150mm is a must, but first, you should get the highest voltage you possibly can and for the highest efficiency as well. 40mm fans get loud, even in good PSUs like the SSP300 and the FSP400 (which are both 80+ Gold). The first quiet Flex PSU I ever used was the FSP500-50FSPT, apart from one that I fitted an 80mm fan to, so that is a very huge issue to overcome.
And second, consider that you might as well let FSP design a completely custom PSU (including form factor) if it's just for one case. The biggest issue, as others have said, would be to get enough orders for your case/the standalone PSU to fulfil FSPs MOQ for a custom design. I reckon that might be a bit higher than the 300 they ask for modified designs. Your best bet would be to make a case like this for a big retailer that sells pre-built systems to get the MOQ going an then sell leftovers to enthusiasts. Problem there is that you'd have to invest an awful lot of money up-front.
