FAQ: Memory settings on ASUS MoBos

I know a lot of people (including me) are having problems running memory factory timings on ASUS motherboards... Something I learned today is that on recent BIOS (I don't know how recent) the orders of the memory timing parameters is not the same as the one used by the manufacturers.
For example, when buying a memory, you probably saw those numbers: 2-3-2-6 (numbers for Corsair XMS PC3200LL). What those numbers mean is:
CAS Latency: 2
RAS to CAS delay (tRCD): 3
RAS Precharge (tRP): 2
Active to Precharge Delay (tRAS): 6

Now, on most Asus BIOS you will have to enter those parameters in the following order:
2-2-3-6 (CAS#, tRP, tRCD, tRAS)

and now your memory should work fine.....

Side note: when testing your memory with memtest, you should be disabling your Legacy USB support during the test as there are numerous known memtest issue when this is enabled. You can re-enalbe it after the test.

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Asus P4C800-E Deluxe
P4 3.0GHz HT
1Gb Corsair XMS PC3200LLPT
ATI A-i-W Radeon 9800 Pro
WD 200Gb SATA
Lite-on IDE Combo Drive
Win XP Pro SP1
3 answers Last reply
More about memory settings asus mobos
  1. I have a similar system to yours, and i must be honest as I am a little lost as to timings and some of the other settings. It is probably running on the normal setting.
    how do you check these numbers and where? In the bios?
    i only bought two 256 sticks of CorsairXMS 3200 Platinum and wonder if I shouldn't have gone ahead and just bought the double 512's (1GB). Does this much more memory really make a big difference? I know it will now cost me double the amount vs, a little over two hundred dollars
    I did a system check with some program (Fresh Diagnose ),and there sure is a whole lot of info that I really don't fully understand. The benchmark graph is at the high end,but some of the numbers like realtime memory have me a little baffled. I could swear it said something like 38xxxmb. blah blah!
    Some day I am going to get ahold of all the material I can to explain the intricacies of the computer system.
    Do you think the Sandra program is a good tool? I guess it is the indudstry standard. Thanks for reading my babble.
    I just go along,learn a bit and continue.Really should have Majored in this way back in 1974 when I went to college.i do OK for an intelligent guy. blah blah..
  2. 1) Correct those numbers are in the BIOS:
    Advance Menu -> Chipset -> Set the "Configure DRAM Timing by SPD" to disabled and then the DRAM sub-items will show up. This is where you'll configure those timings.
    Now when you buy a stick of memory, those timing should be written up somewhere. Make sure that the Bios uses the sam numbers as your DDR.
    2) Well 2x256 might become a little small (depends on what you are doing with your PC)...If you see that your system is using all your memory and starts to slow down because of disk access (the PC will write data to the HDD when running out of DDR), then you'll know it's time to upgrade your system.
    3) Sandra is very good to test the system overall.

    ---------------------
    Asus P4C800-E Deluxe
    P4 3.0GHz HT
    1Gb Corsair XMS PC3200LLPT
    ATI A-i-W Radeon 9800 Pro
    WD 200Gb SATA
    Lite-on IDE Combo Drive
    Win XP Pro SP1
  3. Here are my AMD system specs on my ASUS motherboard. If you go to http://www.aida32.hu/aida32.php that link you can download the World Wide System tool and post your system specs here like I have. The tool is free and full version not a trail program. I would be very interested in what a system like yours reports for system information.
    The aida program lets you copy past from it so you can produce the same info I have below. I would appreciate it much.
    CHEERS!!

    CPU Properties
    CPU Type AMD Athlon XP-A, 2083 MHz (6.25 x 333) 2800+
    CPU Alias Barton
    L1 Code Cache 64 KB
    L1 Data Cache 64 KB
    L2 Cache 512 KB (On-Die, Full-Speed)

    CPU Physical Info
    Package Type 453 Pin PGA
    Package Size 4.95 cm x 4.95 cm
    Transistors 54.3 million
    Process Technology 6Mi, 0.13 um, CMOS, Cu
    Die Size 101 mm2
    Core Voltage 1.65 V
    I/O Voltage 1.6 V
    Typical Power 53.7 - 60.4 W (depending on clock speed)
    Maximum Power 68.3 - 76.8 W (depending on clock speed)

    CPU Manufacturer
    Company Name Advanced Micro Devices, Inc.
    Product Information http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118,00.html

    CPU Utilization
    CPU #1 0 %

    CPUID Properties
    CPUID Manufacturer AuthenticAMD
    CPUID CPU Name AMD Athlon(TM) XP 2800+
    CPUID Revision 06A0h
    Extended CPUID Revision 07A0h
    Platform ID CBh (Socket A)
    IA CPU Serial Number Unknown

    Instruction Set
    AMD 3DNow! Supported
    AMD 3DNow! Professional Supported
    AMD Enhanced 3DNow! Supported
    AMD Extended MMX Supported
    AMD64 Not Supported
    Cyrix Extended MMX Not Supported
    IA-64 Not Supported
    IA MMX Supported
    IA SSE Supported
    IA SSE 2 Not Supported
    IA SSE 3 Not Supported
    CLFLUSH Instruction Not Supported
    CMPXCHG8B Instruction Supported
    Conditional Move Instruction Supported
    MONITOR / MWAIT Instruction Not Supported

    CPUID Features
    36-bit Page Size Extension Supported
    Automatic Clock Control Not Supported
    CPL Qualified Debug Store Not Supported
    Debug Trace Store Not Supported
    Debugging Extension Supported
    Enhanced SpeedStep Technology Not Supported
    Fast Save & Restore Supported
    Fast System Call Supported
    Hyper-Threading Technology Not Supported
    L1 Context ID Not Supported
    Local APIC On Chip Supported
    LongRun Not Supported
    LongRun Table Interface Not Supported
    Machine-Check Architecture Supported
    Machine-Check Exception Supported
    Memory Type Range Registers Supported
    Model Specific Registers Supported
    Page Attribute Table Supported
    Page Global Extension Supported
    Page Size Extension Supported
    Pending Break Event Not Supported
    Physical Address Extension Supported
    Processor Duty Cycle Control Not Supported
    Processor Serial Number Not Supported
    Self-Snoop Not Supported
    Thermal Monitor Not Supported
    Thermal Monitor 2 Not Supported
    Time Stamp Counter Supported
    Virtual Mode Extension Supported

    Enhanced Power Management
    Frequency ID Control Not Supported
    Software Thermal Control Not Supported
    Temperature Sensing Diode Supported
    Thermal Monitoring Not Supported
    Thermal Trip Not Supported
    Voltage ID Control Not Supported
    Motherboard Properties
    Motherboard ID 02/13/2003-VT8377/VT8235-A7V8X-X
    Motherboard Name Asus A7V8X

    Front Side Bus Properties
    Bus Type DEC Alpha EV6
    Bus Width 64-bit
    Real Clock 167 MHz (DDR)
    Effective Clock 333 MHz
    Bandwidth 2666 MB/s

    Memory Bus Properties
    Bus Type DDR SDRAM
    Bus Width 64-bit
    Real Clock 167 MHz (DDR)
    Effective Clock 333 MHz
    Bandwidth 2666 MB/s

    Chipset Bus Properties
    Bus Type VIA V-Link
    Bus Width 8-bit
    Real Clock 67 MHz (ODR)
    Effective Clock 533 MHz
    Bandwidth 533 MB/s

    Motherboard Physical Info
    CPU Sockets/Slots 1
    Expansion Slots 6 PCI, 1 AGP
    RAM Slots 3 DIMM
    Form Factor ATX
    Motherboard Size 240 mm x 300 mm
    Motherboard Chipset KT400
    Extra Features Q-Fan, CPU Overheating Protection, JumperFree, Stepless Freq Selection

    Motherboard Manufacturer
    Company Name ASUSTeK Computer Inc.
    Product Information http://www.asus.com/products/mb/mbindex.htm
    BIOS Download http://www.asus.com/support/download/download.aspx

    Physical Memory
    Total 1023 MB
    Used 262 MB
    Free 761 MB
    Utilization 26 %

    Swap Space
    Total 2462 MB
    Used 174 MB
    Free 2287 MB
    Utilization 7 %

    Virtual Memory
    Total 3486 MB
    Used 437 MB
    Free 3049 MB
    Utilization 13 %

    Chipset Properties
    Motherboard Chipset VIA VT8377 Apollo KT400
    In-Order Queue Depth 4
    CAS Latency 2.5T
    RAS To CAS Delay 3T
    RAS Precharge 3T
    RAS Active Time 7T

    Memory Slots
    DRAM Slot #1 512 MB (DDR SDRAM)
    DRAM Slot #2 512 MB (DDR SDRAM)

    AGP Properties
    AGP Version 3.05
    AGP Status Enabled
    AGP Aperture Size 1024 MB
    Supported AGP Speeds 1x, 2x, 4x, 8x
    Current AGP Speed 8x
    Fast-Write Supported, Enabled
    Side Band Addressing Supported, Enabled

    Chipset Manufacturer
    Company Name VIA Technologies, Inc.
    Product Information http://www.via.com.tw/en/apollo/chipsetindex.jsp
    Driver Download http://www.viaarena.com/?PageID=2

    BIOS Properties
    BIOS Type Award Modular
    Award BIOS Type Award Modular BIOS v6.0
    Award BIOS Message ASUS A7V8X-X ACPI BIOS Revision 1003
    System BIOS Date 02/13/03
    Video BIOS Date 10/21/02

    BIOS Manufacturer
    Company Name Phoenix Technologies Ltd.
    Product Information http://www.phoenix.com/en/products/default.htm

    »§øЫÑighthåwk™ Don't get mad at the player get mad at the game. Hackers drool and Skill's rule.
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