User manual ASUS MAXIMUS II FORMULA TECHNICAL SPECIFICATIONS

[. . . ] Maximus II Formula Motherboard E3808 Second Edition V2 May 2008 Copyright © 2008 ASUSTeK COMPUTER INC. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing. ASUS PROVIDES THIS MANUAL "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT. [. . . ] A very high DRAM frequency may cause the system to become unstable!If this happens, revert to the default setting. The configuration options may vary depending on the CPU level you select. DRAM Command Rate [Auto] Select [1N] to obtain better DRAM performance; select [2N] to enhance DRAM overclocking ability. Configuration options: [Auto] [1N] [2N] DRAM CLK Skew on Channel A1/A2/B1/B2 [Auto] Configuration options: [Auto] [Advance 350ps] [Advance 300ps] [Advance 250ps] [Advance 200ps] [Advance 150ps] [Advance 100ps] [Advance 50ps] [Normal] [Delay 50ps] [Delay 100ps] [Delay 150ps] [Delay 200ps] [Delay 250ps] [Delay 300ps] [Delay 350ps] DRAM Timing Control [Auto] Configuration options: [Auto] [Manual] The following items become configurable when you set DRAM Timing Control to [Manual]. 1st Information : 5-5-5-15-3-44-5-3 (These values are auto-detected) CAS# Latency [5 DRAM Clocks] Configuration options: [3 DRAM Clocks] [4 DRAM Clocks]­[11 DRAM Clocks] DRAM RAS# to CAS# Delay [5 DRAM Clocks] Configuration options: [3 DRAM Clocks] [4 DRAM Clocks]­[18 DRAM Clocks] ­[18 [18 ASUS Maximus II Formula 3-13 DRAM RAS# Precharge [5 DRAM Clocks] Configuration options: [3 DRAM Clocks] [4 DRAM Clocks]­[18 DRAM Clocks] ­[18 [18 DRAM RAS# Activate to Precharge [15 DRAM Clocks] Configuration options: [3 DRAM Clocks] [4 DRAM Clocks]­[18 DRAM Clocks] ­[18 [18 RAS# to RAS# Delay [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 Row Refresh Cycle Time [Auto] Configuration options: [Auto] [20 DRAM Clocks] [25 DRAM Clocks] [30 DRAM Clocks] [35 DRAM Clocks] [42 DRAM Clocks] Write Recovery Time [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 Read to Precharge Time [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 2nd Information : 8-3-5-4-6-4-6 (These values are auto-detected) READ to WRITE Delay (S/D) [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 WRITE to READ Delay (S) [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 WRITE to READ Delay (D) [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 READ to READ Delay (S) [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 READ to READ Delay (D) [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 WRITE to WRITE Delay (S) [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 WRITE to WRITE Delay (D) [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] ­[15 [15 3rd Information : 13-5-1-6-6 (These values are auto-detected) WRITE to PRE Delay [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] READ to PRE Delay [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] PRE to PRE Delay [Auto] Configuration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks] [3 DRAM Clocks] ALL PRE to ACT Delay [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] 3-14 Chapter 4: BIOS setup ALL PRE to REF Delay [Auto] Configuration options: [Auto] [1 DRAM Clocks]­[15 DRAM Clocks] DRAM Static Read Control [Auto] DRAM Read Training [Auto] MEM. OC Charger [Auto] Configuration options: [Auto] [Disabled] [Enabled] Configuration options: [Auto] [Disabled] [Enabled] Enable this item to increase DRAM overclockability. Configuration options: [Auto] [Disabled] [Enabled] Ai Clock Twister [Auto] Allows you to configure the DRAM performance. Setting this item to [Light] enhances the DRAM compatibility. Setting this item to [Strong] enhances the DRAM performance. Configuration options: [Auto] [Lighter] [Light] [Moderate] [Strong] [Stronger] Ai Transaction Booster [Auto] Configuration options: [Auto] [Manual] C/P : A1 A2 A3 A4 (These values are auto-detected) LVL : 12 12 12 12 (These values are auto-detected) The following items appears when you set Ai Transaction Booster to [Manual]. Common Performance Level [05] (This value is auto-detected) Set this item to a higher level for better compatibility or a lower level for better performance. Use the <+> and <-> keys to adjust the value or type the desired value using the numeric keypad. Pull-In of CHA/B PH1/2/3/4 [Disabled] Set this item to [Enabled] to enhance DRAM Channel A and B, Phase 1 to 4. The number of phases is determined by DRAM frequency and FSB strap. Configuration options: [Disabled] [Enabled] PCIE Frequency [XXX] Allows you to set the PCI Express frequency. Use the <+> and <-> keys to adjust the PCIE frequency. You can also type the desired value using the numeric keypad. This item appears when you set Ai Overclock Tuner to [CPU Level Up] or [Manual]. ASUS Maximus II Formula 3-15 The following seven items are adjusted by typing the desired values using the numeric keypad and press the <Enter> key. You can also use the <+> and <-> keys to adjust the value. To restore the default setting, type [auto] using the keyboard and press the <Enter> key. CPU Voltage [Auto] Allows you to select the CPU voltage. The text color in the configuration field corresponds to the onboard CPU LED color, both of which indicate voltage condition. When you set the CPU LED Selection item to [Vcore], the onboard CPU LED displays CPU voltage condition. Refer to page 2-1 for CPU LED definition. The values range from 0. 85000V to 2. 50000V with a 0. 00625V interval. Refer to the CPU documentation before setting the CPU voltage. [. . . ] Use walking 1's algorithm to check out interface in CMOS circuitry. Also set TESTCMOS real-time clock power status, and then check for override. Program chipset default values into chipset. INIT CLK CHECKCPU Detect CPU information including brand, type and CPU level (586 or 686). [. . . ]