Will I get the most out of my PC with 8GB of ram?

Memorry: G.SKILL Ripjaws X F3-14900CL9D-8GBXL 8GB 2X4GB DDR3-1866 CL9-10-9-28 Memory

CPU: Intel Core i5 4670K Unlocked Quad Core 3.4GHZ Processor (to OC in the future to 4.3GHz)

GPU: ASUS Radeon R9 280X OC 1070MHZ 3GB 6.4GHZ GDDR5 (to OC in the future to 1170MHz)

Mobo: Gigabyte Z87X-UD3H

SSD: Kingston SSDNow V300 240GB 2.5in SATA3 LSI SandForce Solid State Disk Flash Drive SSD

HDD: Western Digital Red 1TB SATA3 64MB Cache

CPU Cooling: Thermaltake Water 2.0 Pro All-in-One Liquid Cooling System

Your thoughts?

8GB is fine for gaming and most software.

You'd only want more for photoshop and HD video editing (Or VMs etc).

THIS

The only time I can actually fill up all 8gigs is to run both sims 3 and skyrim at the same time

Try to push it to 16GB if it's in your budget just for future proof but if not 8GB will be fine for gaming.

If you do other intensive stuff with your PC (photo editing, video editing, CAD, processing data etc) then you might want to consider 16 or 32 as a serious option.

I say 8GB is more than enough. You'll still have 2 extra slots, so you can add more in the future if needed.

this Is so true, I recently upgraded to 16GB corsair dominator platinum 2133mhz and I have only gotten up to 9GB on 1 game ever and that was planetary annihilation. however the majority of the time i use it for CS6 master collection and Catia V5 and STAR CCM all mainly programs used for design, engineering and computational fluid dynamics simulations. so unless you're using it for that sort of stuff 8GB will be great