I'm using a PicoPSU 120W for over 1.5year (along with Ian's ATX adapter), that powers my full A1200D PPC along with all the things you see on my signature. No problem @ all and everything works like a charm.
As Delshay said... the only thing you should worry about is the heat. Adding 2xmini VGA heatsinks in the 2 hot components (the yellow square) plus a mini fan blowing air to the PSU and you're set! You can check some pics of it inside my A1200 if you click on the link in my signature.
i will test your set-up,but is that a Elbox Fast Eide MKIII and you don`t have built-in switcing between Bvision and Indivision. my A1200 motherboard has a standard 15pin VGA socket which outputs both Indivision/Bvision.
Bvison overclocked ( 100Mhz as standard ) when using OS3.9 this card can go faster but it is limited by the software.
Bvision are limited in top end speed by the hardware,but *my Bvision(s)* it`s the other way round it now the software thats the problem.
poor photo of Bvision(s) done this way for a reason.
http://www.amiga.org/gallery/index.php?n=3219 *** this is where the power drain is...83Mhz bus ( 334Mhz ) on the Blizzard card*** the Pico PSU can not cope with this card at this speed.
68060 is clocked at 72Mhz but is now Beta at 73Mhz
the voltage jrops to around 4.86 when card is added. the voltage needs to be at the very min 4.94 but even at this voltage setting it will sometimes crash. the voltage must read 4.98 and above for it to be stable.
i don`t know how you have added in your Pico PSU but my A1200 motherboard(s) has a ATX PSU Socket,so i can choose what PSU i can use.
but the most amazing thing about my A1200 is there is not a single cable/or wire to be seen when veiwed from above,but somehow it is all connected.