Will this psu enough for my pc?

Yes - more than enough power to run that system and the add ons.
Can't find any reviews of the FSP epsilon, but I don't think
you'll have an issue.

Tom

Yes, ample power. Though I would get a better PSU, lower wattage for around the same price. Maybe an Antec Neo Eco 520c?

the only psu that has a good review in my region is the silverstone st50f-es 500w..but is a 500w psu enough for my pc?even with the add-ons?

because i tried looking for an antec neo eco 520w but it's already out of stack and i don't know when they will have another shipment for it..

For a system using a single GeForce GTX 550 Ti graphics card NVIDIA specifies a minimum of a 400 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most important factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The FSP Epsilon Series 80PLUS 600, with its maximum combined +12 Volt continuous current rating of 41.5 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single GeForce GTX 550 Ti graphics card.

The Antec Neo ECO 520, with its maximum combined +12 Volt continuous current rating of 40 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single GeForce GTX 550 Ti graphics card.

thanks for the info ko888!!!  

thanks for the help my friends!!