Same issue. The stock FPS template eats up ram slowly as does custom projects. Blank projects do not however it seems so far, I can leave a blank project open all day and it sits steady.
AMD FX-6300 6 core CPU@4ghz. Vishera AM3+ 32nm running on 64 bit supports mmx+, sse1-4.2 & 4a, x86-64, amd-v, aes, avx, xop, fma3 & 4.
MSI 970 gaming series mobo. 8 gigs of ddr3 1600 in dual channel (pc3-1200j) kingston hyper x. Northbridge running at 2000mhz. HT link at 2400. Bus speed is 200mhz.
Running the same video card as avolanty I beleive. A EVGA Nvidia Geforce GTX 760 (the Ti version) which is 28nm tech, running at 980mhz core and 3ghz ram. 2gb version.
I work with avolanty and get tyhe same issues even running the ocean project fresh out of the box for example.