^ Concur But the Power is also split between 2 different rails.
The HDD and BD use both the +5 V Rail and the + 12 V Rail while the SSD will only draw power from the 5 V rail.
Best guess is <15 Watts on +12V rail and < 10 Watts on 5 Volt rail
Typical avail power is about 240 watts, But they may be on the same rail as GPU - still NO problem. Some PSUs that have 3 +12V rails the GPU will have it's own rail.