The questions that keep getting asked:
1. Oh noes! No dual channel, that means my computer sux0rs right?
No, the difference is, at most, 5%. Benchmarks on the i9300 have shown there to be NO difference between single channel and dual channel supposedly due to the 133 mhz FSB.
2. Whats better, 1 gig dual channel or 1.25 single channel?
Considering the fact that dual channel doesn't mean much, do you like having more RAM or less RAM?
3. Will I notice a difference with more RAM?
If you are Word Processing, why would you need over 1 gig of RAM? As a reminder, more RAM doesn't mean your computer just starts performing better magically. More RAM allows you to have more programs open at once or gives your computer games like HL2, WoW, Doom 3, and Far Cry some more memory so that your computer does not need to write to the Page File (virtual memory that is written onto the hard drive which greatly decreases performance).
You will benefit from 1.25 Gigs if you like to have Half Life 2 running and you like to multitask with AIM/Firefox etc. Or if you just don't want to streamline the processes running in the background to free up memory.