Past 8GB of RAM users of consumer software (games, MS office, streaming, etc) will generally not see significant performance gains. If you're running high end design apps, dong a lot of virtualization, or compiling very large bits of software regularly then 16+ becomes reasonable. Given that your rig has only a dual channel memory controller, I would strongly advise sticking with a single two stick kit. If you're not consuming anything approaching say 4-6GB of usage when under full load then stick with 8GB.
Remember this: running 4 DIMMs on a dual channel controller will reduce
memory throughput (as it can only actually read two DIMMs per cycle). If adding memory capacity keeps your OS from having to write to your relatively slow SSD or HDD swap/paging file then it is worth slight reduction in memory throughput. If you aren't using enough RAM to justify that trade-off, then you are actually harming memory performance needlessly.
Use the cash to start saving for a better GPU, or a Haswell rig.
Originally Posted by Lord Xeb
For streaming, you don't need even 8GB to do that. For streaming you need fast network speeds and a processor to keep up.
For streaming that Realtec LAN chip isn't going to be doing you any favors if your CPU is under heavy utilization. A $30 Intel NIC would be a much more sensible upgrade.
http://www.newegg.com/Product/Product.aspx?Item=N82E16833106033Edited by RandomK - 1/1/13 at 11:56pm