Currently I have this motherboard:
And this ram:
APACER 2G DDR3-1333MHz CL9
My OS is the latest LTS of Ubuntu (also have Windows XP on another partition, for when I rarely need to use it. Yes, I am aware XP won't be able to use more than 4gigs but that shouldn't stop me using more than that if I wish to for Ubuntu?).
Would one of these two thus be an appropriate choice for me:
Kingston ValueRam 2GB 1333MHz DDR3 Non-ECC CL9 DIMM
STRONTIUM HYNIX 4GB 1333MHz DDR3 Single Module PC10660 w/ Lifetime Warranty