http://www.anandtech.com/show/6013/350450w-roundup-11-cheap-psus/4
They call it "cheap" because of the price, but it's probably OK:
-- Their site says they would probably be able to get the 80+ Bronze rating, except that the Electric Power Research Institute/EPRI only tests 115V PSUs, not 230V PSUs (http://bulk.fsp-europe.com/fsp400-60apn-85);
-- Anandtech.com rates the capacitors (mostly CapXon, some Teapo) as being solid & reliable (http://www.anandtech.com/show/6013/350450w-roundup-11-cheap-psus/4)
-- Although your specific model isn't on the list, FSP is listed as both the brand name & OEM source for a number of Tier 1 to Tier 3 PSUs (http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html). They also are listed as the source for a Tier 4 PSU (FSP Raider series, as well as EVGA's NEXB series), but I don't think that's what your PSU is.
The manufacturer lists it as 400W; Anandtech lists it as only 336W guaranteed (at least on the 12V rails), although apparently it does come with a single 6-pin PCIe connector. For safety's sake, I would still make sure that the new GPU does not require the use of PCIe power connectors. For example, something like Gigabyte's OC (http://www.gigabyte.us/Graphics-Card/GV-N1050OC-2GD#sp) or D5 (http://www.gigabyte.us/Graphics-Card/GV-N1050D5-2GD#sp) cards, or EVGA's SSC Gaming (https://www.evga.com/products/product.aspx?pn=02G-P4-6154-KR) card, should do just fine for your system. I'm sure MSI, PowerColor, & other vendors have similar models as well.