Do it!
Get them on the phone man, they advertised that thing as being SLI ready because it had 2pcie connectors. 2x25amps (where it is really one shared 25amp rail) is in many ways screwing people over that actualy need it for SLI. According to specs I've found, this PSU would just barely let you use a GeForce GTS 450, and I seriously doubt it would let you SLI two of them.
You should ask OCZ if they will let you have a credit towards purchasing a better one. That isn't asking them more than what they should do. If you have to go OCZ, here are 2 I spec'd out for good output amps.
OCZ-ZT550W
(+3.3V@24A, +5V@24A, +12V@45A, [email protected], +5VSB@3A )
OCZ-ZT650W (+3.3V@30A, +5V@24A, +12V@54A, [email protected], +5VSB@3A)
---The 550 wants 8amps in, the 650 wants 10amps in.
When I spec'd out my new PSU, I decided that 4 12volt rails would assure 1 for CPU, 1 for MB header, and 2 for power on a vid card. It said 40amps on each rail so it won my money. From what I read single rail vs multi rails doesn't mean that much as long as the amps are there for all your 12volt stuff, CPU, MB, Vid card.
OCZ is a good company for RAM and SSDs, I've never gotten one of their PSUs because I like going with what companies originally started manufacturing. However, I do have 5 SSDs from OCZ, all of them tip top products imo. ASUS did motherboards, evga did vid cards, antec did PSUs, and so on. Most companies have expanded into new markets, but they have the most time in research and development with the markets they started in. Gigabyte has been getting some cudos for their MBs in the past few years, so their vid cards are probably a good gamble.
If OCZ doesn't get you straight, just tell them Antec and Corsair are making stronger PSUs so you have somewhere to correct your problem and cut your losses with their company.
I'd really like to know 2 things if you could get back to us. First, did OCZ make an effort to help you correct your problem (a refund, you pay difference in upgrade, free upgrade). Second, did getting a PSU with more amps on the rails correct your problem?
Good luck on the phone!