With AMD processors the stock ram speed is 1333 MHz and the timings 9-9-9-24-32.
So in essence when using 1600 MHz ram you are overclocking a little bit, so in other words the only processors that see 1600MHz on first boot as far as I'm aware are intel's.
So you will have to set the speed and timings in bios on first boot to get the rated speed.
Now to answer the question at hand, these are the best in speed and timings:
Corsair XMS3 - Memory - 4 GB : 2 x 2 GB - DIMM 240-pin - DDR3 - 1600 MHz / PC3-12800 - CL7 - 1.65 V - unbuffered - non-ECC.
Stock speed for Intel's IMC is 1066 MHz.
The RAM settings you see the first time you boot are read from the RAM itself. There is an "SPD" chip that holds data about what settings are approved by the manufacturer. The first entry is usually slow and the timings are loose - this guarantees that it will boot with most machines.
I have a 1090T, specs below, and I can't seem to get this to run stable on any OC setting. I am new to this as well, so I have some understanding but not alot. Any help would be great.
Edited by willis888 - 1/8/11 at 9:45pm