User manual ABIT IT7-MAX2

[. . . ] Copyright and Warranty Notice The information in this document is subject to change without notice and does not represent a commitment on part of the vendor, who assumes no liability or responsibility for any errors that may appear in this manual. No warranty or representation, either expressed or implied, is made with respect to the quality, accuracy or fitness for any particular part of this document. In no event shall the manufacturer be liable for direct, indirect, special, incidental or consequential damages arising from any defect or error in this manual or product. Product names appearing in this manual are for identification purpose only and trademarks and product names or brand names appearing in this document are the property of their respective owners. [. . . ] Since the parameters of the buffers are closely related to hardware, if the setup is not correct or is false, the motherboard will become unstable or you will not be able to boot up. If you don't know the hardware very well, use default values (i. e. The only time you might consider making any changes is if you discover that data is being lost while using your system. Figure 3-6. Chipset Features Setup Screen You can use the arrow keys to move between the items. Use & , ' and <Enter> key to change the values. When you have finished setting up the chipset, press <Esc> to go back to the main menu. NOTE: The parameters in this screen are for system designers, service personnel, and technically competent users only. Do not reset these values unless you understand the consequences of your changes. The first chipset settings deal with CPU access to DRAM. The default timings have been carefully chosen and should only be altered if data is being lost. Such a scenario might well occur if your system has mixed speed DRAM chips installed. In such a case, greater delays may be required to preserve the integrity of the data held in the slower memory chips. DRAM Timing Selectable: This item sets the optimal timings for the following four items, depending on the memory module you are using. The default setting "By SPD" configures these four items by reading the contents in the SPD (Serial Presence Detect) device. The EEPROM on the memory module stores critical parameter information about the module, such as memory type, size, speed, voltage interface, and module banks. # CAS Latency Time: This item controls the latency between the DRAM read command and the time that the data becomes actually available. # Act to Precharge Delay: The options are: 7, 6, and 5. # DRAM RAS# to CAS# Delay This item controls the latency between the DRAM active command and the read/write command. User's Manual 3-12 # Chapter 3 DRAM RAS# Precharge: This item controls the idle clocks after issuing a precharge command to the DRAM. DRAM Data Integrity Mode: Two options are available: ECC and Non-ECC. This option is used to configure the type of DRAM in your system. ECC is "Error Checking and Correction". [. . . ] If you feel that you need to contact ABIT directly you can send email to the ABIT technical support department. First, please contact the support team for the branch office closest to you. They will be more familiar with local conditions and problems and will have better insight as to which resellers offer what products and services. Due to the huge number of emails coming in every day and other reasons, such as the time required for problem reproduction, we will not be able to reply to every email. [. . . ]