Your Ad Here

Tuesday, September 2, 2008

PC Over Clocking Part 3. Managing RAM

Choosing the parameters, you can almost always assume that the less delay, the better. At the same time, settings that are too low may lead to the unreliable operation of the memory, and thus make the whole system unstable. In such a case, simply load the default settings (BIOS Setup Defaults menu) and the system will return to its original state. By changing the parameters associated with memory time delays in BIOS Setup, it is impossible to harm the computer. If the system is not working correctly, or if it completely refuses to work, you can simply return to the original settings.
A more detailed explanation of each of the parameters can be found in the manual for the motherboard, or in the appropriate technical literature. Here, you'll find a few examples of how to adjust them with the aim of increasing the RAM operating frequency.
Most frequently, all of the necessary parameters that control the work of the RAM are found in the BIOS Setup menu called Advanced Chipset Setup. The items on this menu are listed below. You can usually change the values using <+> and <−> or and keys. Enabled/Disabled refers to enabling or disabling the corresponding option.
Auto Configuration
All parameters will be set automatically.
In order to be able to set the parameters manually, it is recommended that you disable this option. If this option is enabled, most parameters will be set automatically.
DRAM Read Timing
The number of cycles while accessing the memory.
This parameter can take on the values x111, x222, x333, and x444. The less the number of cycles, the better. To achieve maximum performance, you must assign this parameter the lowest possible value. However, make sure that the system is stable at the modified settings. The possible (and recommended) values are: EDO RAM — x222 and x333, FPM RAM — x333 and x444, SDRAM — x111 and x222.
DRAM Write Timing
It is recommended that you change this parameter in a way similar to the one used to modify the previous one.
RAS to CAS Delay
Try to set the lowest possible value for this parameter. Notice, however, that not every RAM module will be able to work with the lowest setting. Because of this, it is recommended to test your system after changing this setting.
DRAM Leadoff Timing
The value of this parameter depends not only on the type of the memory installed in your system, but also on the chipset at the motherboard. For read operations, Intel Triton FX chipset normally does not allow you to set DRAM timing cycles less than 7-x-x-x, while TX or HX chipsets require that this value be no less than 5-x-x-x. For write operations, these parameters should be set to the values no less than 5-x-x-x (FX) and 4-x-x-x (TX and HX).
At a value of 5, the system will be able to work if using 50 nsec EDO RAM or 10 nsec SDRAM. As always, it's worth trying to set the lowest possible value.
Turbo Lead Leadoff
Turbo Read Pipelining
Speculative Lead Off
You should try to enable these parameters, and then test the system's usability and performance. Certain types of RAM can produce a significant growth in performance if these parameters are turned on.