[Lsdmeasap]

Well, I lied about the "fun" part.

Standard high performance setup with no overclock - recording the baseline

You need to know your rams specified speed and voltage ! If you do not, go find out now.
It is almost always given as a series of four hyphenated numbers corresponding to the CAS latency, RAS-to-CAS delay, RAS precharge, and active-to-precharge delay, like 5-5-5-15, 4-4-4-12 etc.

The good news is that they are entered in the same order as typically given in specs.

Example
Assume memory with rating of 4 - 5 - 3 -15 using 2.1V, (programmed with SPD settings of 5 5 5 15), it will be used in this example and below in the bios settings listing as an example, you should of course find and use your memory timings and voltage as recommended by the manufacturer.

CAS latency (CL) — CAS latency refers to the delay between when a read operation is issued and when the data returned by that read is considered valid. ( 4 in our example)

RAS-to-CAS delay (tRCD) — The RAS-to-CAS delay occurs between the time a row is activated and when the first read or write operation is performed. (5 in our example)

RAS precharge (tRP) — The RAS precharge is the delay between when a precharge command is issued to close a row and when the next active command can be issued. (3 in our example)

Active-to-Precharge delay (tRAS) — This latency actually spans several steps in the memory access process. The active-to-precharge delay refers to the minimum number of cycles that must elapse between an active and precharge command. (15 in our example)

There are more, commonly called sub-timings but it will be a while before we get into that, leave them on [AUTO] as changes require some serious tweaking and testing and you can render your board un-bootable.

From the main BIOS screen press the and function key (Ctrl+F1) at the same time to enable advanced settings under the M.I.T. sub menu.

Modify your BIOS settings per below.
Example BIOS Ver.: GA-965P-DS3, F10a (your menus may differ slightly but nothing you can not figure out)

The column of memory timings under SPD in the M.I.T screen is a recent addition, you might not see it on some BIOS versions. SPD is a chip on the memory stick with preprogrammed memory timings to help the computer first boot up. These timings are usually much looser than what the manuf advertises and what the memory can actually do, performance wise. That is why we change the memory timings settings to manual control and manually put in the manufacturers advertised high performance timings settings and voltage setting.

Red items are changes from default settings that directly affect overclocking or optimal operation.
Orange items are items you need to set based on your unique hardware
Green items are items that do not affect overclocking and seldom if ever need to be changed
No color used are items that may or may not, mostly not, need to be looked at. Check your manual if unsure.
References and notes about an options will be in Blue so that the Red items needing your attention stand out.

Any comments by me are either beside the item with an "<---" or directly below the item I am commenting on.