Alabama (AL) Sales Tax Rates by City. The state sales tax rate in Alabama is 4.000%. With local taxes, the total sales tax rate is between 4.000% and 11.000%. Alabama has recent rate changes (Tue Sep 01 2015). Select the Alabama city from the list of popular cities below to see its current sales tax rate.
Stands for Double Data Rate Type 3.. DDR3 is a type of SDRAM that is used for system memory. It is available in both DIMM and SO-DIMM form factors. DDR3 RAM is similar to DDR2 RAM, but uses roughly 30% less power and can transfer data twice as fast.
It's therefore crucial that your existing hardware and the memory you want to add are of the same DDR type. The good news is that because DDR3 is so prevalent today, you probably won't need to worry too much about this until DDR4 starts gaining ground in a couple of years.