400FSB BIOS Settings

We have decided to provide users with both 400 and 450FSB starting points for quad-core processors. These settings are geared towards a performance oriented setup for 24/7 usage. Individual systems will require stability testing according to personal preferences and component selections. The settings shown are a guideline only; voltages may vary according to individual components and motherboard ability. Remember, perseverance is the key when overclocking!

2GB QX9650 BIOS settings

Gigabyte GA-X48T-DQ6 Bios Settings @ 400FSB
Robust Graphics Booster Turbo
CPU Clock Ratio 9x
CPU Frequency 400FSB
CPU Host Clock Control Enabled
CPU Host Frequency (MHz) 400
PCI Express Frequency (MHz) 100
C.I.A.2 Disabled
Performance Enhanced With Extreme
System Memory Multiplier 4.00B
DRAM Timing Selectable Manual
CAS Latency Time 6
DRAM RAS# to CAS# Delay 6
DRAM RAS# Precharge 6
Precharge delay (tRAS) 18
ACT to ACT Delay (tRRD) 4
Rank Write To READ Delay 7
Write To Precharge Delay 10
Refresh to ACT Delay 60
Read to Precharge Delay 5
Static tRead Value 6
Static tRead Phase Adjust Auto
Command Rate 1N
CPU/PCIEX Clock Driving 800mV
CPU Clock Skew Control Normal
(G)MCH Clock Skew Control Normal
System Voltage Control Manual
DDR3 Overvoltage Control (+)0.55
PCI-E Overvoltage Control Normal
FSB Overvoltage Control (+)0.35
(G)MCH Overvoltage Control (+)0.25V
Loadline Calibration Disabled
CPU Voltage Control Normal

If stability issues are experienced with these settings or lower a VDimm is favored, CAS 7-6-6-18 - 1N timings should suffice.

Final Thoughts on Overclocking 450FSB BIOS Settings
Comments Locked

37 Comments

View All Comments

  • RamarC - Wednesday, January 2, 2008 - link

    this isn't a typical mobo and it's not being reviewed as such. this article is testing the limits of highest-end board with the highest-end cpus. comparing it to 965 or p35 based mobos makes no sense since a) it's twice as expensive when ram is conisdered and b) the buyer for this type of hardware wants the absolute best performance possible and not the best bang for the buck.
  • Rob94hawk - Wednesday, January 2, 2008 - link

    Been running my Corsair CDFN @ DDR3 1800/7-7-7-20 on the X38T board for a couple of days now. E6750 450x8 @ 3.6Ghz finally Orthos stable (With BIOS F2!)

    http://www.xtremesystems.org/forums/showthread.php...">http://www.xtremesystems.org/forums/showthread.php...

    Great review though. A few BIOS tweaks in here that I did not know about that might help me on my quest for 4Ghz on air.

    Was thinking about pulling the mobo heatpipes and re-seating them with some MX-2.
  • thorgal73 - Wednesday, January 2, 2008 - link

    I have to agree, but not only that : The X38 DDR2 board from Gigabyte seems to respond in much the same way, and displays the same quirky behaviour the X48 sometimes does.

    I do hope things get better as time passes, as the "reboot to a messed up bios" problem is really bugging me.
  • UnclePauly - Wednesday, January 2, 2008 - link

    My 965p-ds3 rev.2.0 does the same thing. HA!....... I'm starting to sense a pattern here.....
  • Rob94hawk - Wednesday, January 2, 2008 - link

    Been running my Corsair CDFN @ DDR3 1800/7-7-7-20 on the X38T board for a couple of days now. E6750 450x8 @ 3.6Ghz finally Orthos stable (With BIOS F2!)

    http://www.xtremesystems.org/forums/showthread.php...">http://www.xtremesystems.org/forums/showthread.php...

    Great review though. A few BIOS tweaks in here that I did not know about that might help me on my quest for 4Ghz on air.

    Was thinking about pulling the mobo heatpipes and re-seating them with some MX-2.
  • Rajinder Gill - Wednesday, January 2, 2008 - link

    Hi Rob,

    Looks like you're running the X38T and not the X48T?

    regards
    Raja
  • Rob94hawk - Friday, January 4, 2008 - link

    Yes I've got the X38T and it's a great mobo.

Log in

Don't have an account? Sign up now