When you use all 4 slots your RAM will basically run twice as fast, but it takes more CPU power to do so, since your using 1600Mhz you should be able to get away with 2 sticks just fine and that's the way I would go, you can always add 2 more later on.
Since I still run older 800 Mhz DDR2 memory I use all 4 sticks.
...buy a better GPU you will NOT notice any difference whatsoever IF Gaming is the PC's use.
Maybe this makes better sense -- my intention was not to offend:
IF for Gaming then get a better GPU than more RAM, additional RAM won't make any difference.
I was referring to RAM vs GPU. The GTX 550Ti is fine for Photos.
Your set up made little sense 'to me' for stated use then or now. Most folks that do Video & Photo editing don't opt for a i5 and instead go the i7 route, fewer OC (corruption risks), no one uses Quick Sync (fine for your phone), and use a supported accelerated GPU (Premiere or Vegas Pro).
If you're serious above Video and Photo editing then 4x8GB and a supported GPU so the transitions, etc can be done real time.
When I run a small SQL runs @ home I tone down the OC or run stock.
Ah gotcha. This rig was built basically for the intentions of playing Diablo iii. I have been able to play every other blizzard game on my laptop but this. It was built on somewhat of a budget. In time I see myself getting a better GPU (why I made sure to get Express 3.0 slots), but for my needs now and in the near future I would say I definately got my moneys worth out of it. I have enjoyed Overclocking to 4.6ghz (well so far so good) and wanted to get some memory that wasnt 'extreme' but that would preform well with the system, and give me some room to play around with timings to get familiar with it. My end goal is to wait until the new Intel 6 core processor becomes a bit more affordable (makes my mouth water). At that time I plan on blowing a whole lot of money. Back when I bought my laptop SSD's were to much money, hell the i5 processor my laptop has was barely affordable, and the speeds have just blown me away. So this is more so my experimental stage.
Don't hold your breath on 6-core getting cheap anytime soon. Maybe once Intel decides to active the 2 dormant cores. The SB-E (39X0) 'is' 8-cores but Intel decided to disable 2-cores. However, IMO I doubt they will have 8-core until the IB-E (2013) -- i.e. affordable 6-cores.