yeah guys look what i found on a website:
they say tested psu
PSU output (W) Tested Efficiency(%) Tested PFC
Sapphire FirePSU SFI625AWT 625 85 0,9
Enermax Galaxy 1000 EGA1000EWL 1000 82 0,98
Enermax Galaxy 850 EGA850EWL 850 82 0,97
Seasonic Active PFC SS-600HT 600 80 0,97
Tagan Turbojet 1100 TG1100-U95 1100 80 0,99
Tagan Turbojet 900 TG900-U95 900 80 0,97
XFX 850W Black E XPS-850W-BES 850 80 0,97
Antec TruePower Trio TP3-650 GB 650 79 0,96
Enermax Liberty 620 ELT620AWT 620 77 0,98
Be-Quiet Straightpower BQT E5-700 700 76 0,92
sry i had to do copy past cause i am knew in tomshardware and i still dont know how to upload a screenshot^^ however for me it looks like the Tagan 900 Watt is as good as the XFX 850 Watt at the efficient in % maybe 1 thing were xfx is better it has the plug in cables so you just need to put in the psuwhat you use(i mean cables) but there are also the tagan whit this option at 850w ^^ so lets say like that i definitly belive in xfx graphic cards but i have never tested a xfx psu so i have to trust to benchmarks and if i ever see smt like that both same efficient i would rather take a tagan cause i am used to it^^
hope you dont hate me now cause i am trying to show that tagan is also a powerfull psu and also comparabel with xfx for me even better
greets laluma22