6 the PSU is Antec EA-650 Green (80P Bronze, not the Platinum one)
7 There is a power board(?) inside, on the board there are 2 * 6pin PCI-E power connectors remaining.
so if you want to replace a better PSU, make sure it have 2 more 6pin pci-e connectors MORE THAN EA-650.
Can you describe the power board better?
Is it a board that accepts the 20 or 24 pin ATX main plug and has spots for four 6-pin 12v PCIE connectors, and then distributes power to the modules, hub and router? If so, is it a 20 or 24 pin socket? Does it also have a 4 or 8 pin ATX CPU connector? How many output spots does it have, and of what type?