I wanted to add a Thermaltake Power Express 450 to my build.The reason is that I wanted to run a third GTX#480 but my PC&Power Colling Psu is only 1200w and is slightly not enough power.My question is how do I hook the power booster up??I have an expensive build(check my profile if needed) and I do not want to make any mistakes while hooking this item up.All help is appreciated.Just needed some advice.
Ouch, 862W for just the cards. That's 72 amps right there... If there are overclocks involved here then I think you need 100 amps minimum (margin, efficiency, aging)
Turbo-cool 1200W is good for 90A 12V.
I really don't know about your booster. Have a look at the reviews at jonnyguru... there was a review last year on one, and he may have covered it there. Probably connects to the main PSU and there are probably instructions.
Just a guess, but you could solder each same wire to its counterpart. At least for the main mobo power, etc. Other than that, just use different ones from both for the hard drives and graphics cards. Preferably two on the more powerful.
Or just the second part, but I don't know about cases that hold that sort of thing.