[BUILD HELP] Can I still use this Power Supply / RAM with these new items?

I'm trying to building a new gaming computer and I'm not super good with computers, as a note.

I want to upgrade my motherboard to:

GIGABYTE GA-Z68XP-UD3P LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

my processor:

Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 3000 BX80623I52500K

and my graphics to:

EVGA 012-P3-1570-AR GeForce GTX 570 (Fermi) 1280MB 320-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card

If I can I would like to keep my power supply and RAM.. right now I have:

Rosewill RP600V2-S-SL 600W ATX12V v2.01 SLI Ready Power Supply

and

OCZ Signature 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model OCZ3SR1333LV4GK

Would these be still good or should I upgrade them as well?