Yet another question that you've probably heard before.
I have a 1x4GB Corsair XMS3 stick in my desktop currently, but I wanted to add some more.
I bought some more (2X4GB Corsair XMS3), and the speeds were faster (which I know that is usually OK to mix).
HOWEVER, the new ram runs at the timings of 11-11-11-30, whereas the old runs at 9-9-9-24.
The system I run is a Dell Optiplex 780 (SFF) with the standard mobo.
Now, should I...
A) Mix them, boot into the bios, and change the settings, or
B) Not use the old 9-9-9-24 and use the new ones on its own.
If you mix them together, you are better to set the settings to auto. One thing you need to make sure the RAM is 1600MHz 11-11-11-30 or 1866MHz 11-11-11-30, if it is the 1600Mhz, then they will run in the lower speed/timing at 1600MHz 11-11-11-30. If RMA is 1866MHz, then they will run in 1600MHz 9-9-9-24 after you mix them.