I upgrade from a Thermaltake Silent Pure Power 420w 18a, it was powering up:
AMD 64 3200+
DFI LanParty UT NF4 SLI-D
2*512MB Corsair Value Ram
2 HD IDE 40GB each 7200 rpm
1 Sata 160GB
3 120mm fans from swiftech (delta 74cfm)
1 CD-Rw 1 DVD-R
1 CoolDrive 6
Apex Heavy Duty Water Cooling from Swiftech
Then i upgrade to a AMD64 3700+, XFX 7800GTX and 2*512MB OCZ Gold VX, so i decide to get the 550w RealPower sli.
I set up my rig and it doesnt boot, the mobo leds are on but when i push the boton it just flash everything and thats it, i take everything away i put stock cooler to everything and plug with the old PSU (Thermaltake) and it works, i have allready read about the issue of bios -5v so i update with the newest bios from DFI and it didn't work.
I unplugged everything again i just conect mobo, micro, memory, i pluged 24pin, 4pin, 1molex and the one of the floppy and it boot, but when i plug my vidcard and tried to start the system it only flash the blue led of the PSU and thats it, then i risk with a hotplug of the VGA and it began working i turnoff and try powering up and work, then i do hotplug to the HD, Cooldrive, CD-RW, etc, i shutdown and when i turn it on again it again only flashes so again i unpluged everything except the mobo conectors it boot, so i do a hotplug with everything and it begin working, but when i unplugged the power cord for a long period of time it again just flash, so i have to do hotplug again.