Dual rail problem

[vault dveller]

i dont undestand psu thing much,
my current psu has 20amp +12v1 and 20amp +12v2
rails and has max continous max load of 524W.
rest of my pc is this
3x120mm fans
4x2gb ddr3 ram
amd t1055 x6 @3ghz
m4a87td evo mobo
2 hdd
old 9800gt 512mb gpu (heavy oc)
so can i securely buy gtx570?
even as i must conver two molex to 6-pin pcie power
link to only english site i found rest is in finnish or swedish --> http://www.h-online.com/priceinsight/eu/a424238.html

 

[CDdude55]

You'll have to upgrade the PSU for a GTX 570, i'd move up to atleast a solid 650w PSU. Go with a better brand such as Corsair, Antec, Silverstone etc.

 

[vault dveller]

should this one be enought ? http://www.amazon.co.uk/650W-Chieftec-CFT-650-14CS-Su/dp/B0013FCXGU
in here it costs 78€ but i can get it cheaper by ordering it from germany

 

[ko888]

For a system using a single GeForce GTX 570 graphics card NVIDIA specifies a minimum of a 550 Watt or greater power supply that has a combined +12 Volt continuous current rating of 38 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.

The Chieftec Super Series 650W (CFT-650-14CS), with its combined +12 Volt continuous current rating of 52 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 570.

 

[vault dveller]

so, my logick goes like: this my old psu is fine because my friend tested his (same model) and about 39amp measurement, so psu is true about its amps.
then for watts ---> http://www.overclockersclub.com/reviews/palit_gtx_570_sonic_platinum/16.htm thats the power hungriest model so my psu should do fine, as long as i dont oc.
could someone please confirm this? or should i not take the risk an just buy new psu?
(for got to add but psu max peak load is 550w)