Because it was the cheapest PSU i could afford that was atleast 400w + with 15A on atleast one 12v rail (has 15 on 1 and 14 on the other one)
http://www.lc-power.de/index.php?id=209&L=1
I know that you should get 80+ efficient PSU's but that psu was advertised as
http://www.lc-power.de/index.php?id=212&L=1 which has a larger fan, more amps and is 80%+.
I contacted the shop that theyre advertising the 6450GP2 version of the PSU even though its actually the normal 6450 version. They asked if i want my money back but i said no because i couldnt of got any better psu for 40 euros and i cba sending the PSU back anyway.
(this is over 6 months old now though by the way)
edit: Just checked and theyre still advertising the PSU with the GP2 specs for some reason..
http://www.jimms.fi/tuoteinfo/LC6450...=1306525271585