Jump to content
Corsair Community

Gigabyte X48T-DQ6 + 4GB 1333C9DHX working


Recommended Posts

Hi all,


I had a lot of trouble with this combo, and found the same of a few people around here. I have it working stable after 24 hours of memtest86 and 24 of mprime, solid as a rock now. Thought I'd share these settings in case it helps anyone, and also ask for any suggestions for further improvement.


I have a q9550 CPU in here, that's a quadcore 45nm at 2.83GHz. I'm not overclocking, that wasn't my aim, I just wanted a box that ran fast enough at stock speeds. All cooling is stock, in an antek 300 series case.


I'll also discuss a few of the settings on the way hopefully to provide some info to people so they don't have to gather it all up.


I've bolded the stuff that's really important.


The template below came from the thread on extremetech forums.


GIGABYTE GA X48T DQ6 Clock Settings


MB Intelligent Tweaker (MIT)

Robust Graphics Booster...........: AUTO //all settings work here. This setting gives higher priority to the PCIe slots. I have mine on auto to provide better bandwidth to an audio card.

CPU Clock Ratio...................: 8.5 // this is as high as it goes. If you want to OC, you'll have to do it with the FSB

CPU Frequency.....................: 2.83GHz

CPU Host Clock Control............: Disabled // I'm not OC'ing but this is where to do it

CPU Host Frequency(Mhz)...........: 333 // Set the above to Manual to set this

PCI Express Frequency (Mhz).......: AUTO (100MHz) // I didn't mess with this, I have an expensive audio card on there. 100MHz it is.

C.I.A.2...........................: DISABLED // On the lowest setting, it boots, but is not prime stable. All other settings do the scary double-reboot thing and your settings are lost. I've left it disabled. This pushes up the FSB speed when your CPU is under load. It seems it has two steps. This is not the same as overclocking, it's not a constant increase, it's dynamic on CPU load and will OC further than whatever OC you set.

Performance Enhance...............: Turbo // Extreme won't boot, off does. I figure I'll push it as fast as it goes and still works. I gather this is the same as the tRD setting, but exactly what the words represent as measured in seconds is not clear. Extreme also increases vDIMM, in my case it went up to 1.8v. I didn't like that.

System Memory Multiplier (SPD)....: 4.00B // Normal multiplier for this setup (333 FSB). Set according to your FSB and CPU. If your'e OCing, you'll need to drop this to keep the memory slow enough to compensate for the higher FSB, because I gather it doesn't overclock much further than it's rated 1333MHz. What's the difference between for EG 4.00B and 4.00D ?

Memory Frequency(Mhz).............: 1333 // The chips were detected as 1066, I had to set this manually. I wish that was written in the package!

DRAM Timing Selectable ...........: Manual // These are detected as 7/7/7/20. Not stable.

Standard Timing Control

CAS Latency Time (tCL)............: 9

DRAM RAS# to CAS# (tRCD).........: 9

DRAM RAS# Precharge (tRP).........: 9

Precharge Delay (tRAS)............: 24 // Standard settings as printed on the side of the stick. I've seen others try 26-29 here, especially when OC'ing. 24 is faster, so 24 it is.

Advanced Timing Control

ACT to ACT Delay(tRRD)............: AUTO (4)

Rank Write to READ Delay (tWTR)...:AUTO (4)

Write To Precharge Delay (tWR)....:AUTO (8)

Refresh to ACT Delay (tRFC).......: AUTO (60)

Read To Precharge Delay (tRTP)....: AUTO (4)

Static tREAD Value (tRD)..........: 6 // (Auto puts this at 8 or 7). It goes faster, so I left it at 6. Yay. 5 won't boot. 8 and 7 are also stable. Push this up if you're OC'ing, and maybe if your chips aren't so great.

Static tREAD Phase Adj............: AUTO (0)

Command Rate (CMD)................: 2T // You gotta set this. This one really screwed with me. Another one that would be good to put in the package! I could not get auto/1T to work stable at all.

Clock Driving and Skew Control

CPU/PCIEX Clock Driving Control...: defaullt (800mV)

CPU Clock Skew Control............: Normal

(G)MCH Clock Skew Control.........: Normal

System Voltage Control () = Base Voltages: Manual

DDR3 OverVoltage Control...(1.50v): AUTO (1.536V) // I've read that this should be 1.7. I'm undervolting it, because it detects 1.5 (actual read is 1.536). Also stable at +0.15 to take it up to 1.68. I left it on the lower voltage because it works that way. Is that right?

PCI-E OverVoltage Control.,(1.50v): default // I don't wanna fry anything

FSB OverVoltage... 65nm = 1.25v..+: default // I don't wanna fry anything

(G)MCH OverVoltage Control,(1.25v): default // I don't wanna fry anything. I've read suggestions here that this should be increased. Certainly when OC'ing as this is the RAM controller, but when it's stock do I need to do that?

CPU GTLREF1 Voltage*.......(67%)..: AUTO // I don't wanna fry anything

CPU GTLREF2 Voltage*.......(61%)..: Normal // I don't wanna fry anything

Loadline Calibration..............: Disabled // It's stable either way, but the anandtech analysis of the intel datasheets highlights the need to turn this off for 45nm CPUs. Having read them myself, although anandtech don't mention the transient overhead that intel allow, I otherwise agree with them.

CPU Voltage Control...............: AUTO (1.1725V)

Normal CPU Vcore..................: 1.1725 // Was hard to check this on a linux box, but the motherboard did get this one right

Note: * Hidden Features Press [CTRL] + [F1] from main Menu to Access + FSB 45nm= 1.15v

Advanced Bios Features

CPU Multi-Threading...............: Not present

Limit CPUID Max to 3..............: Disabled

No-Execute Memory Protect.........: Enabled

CPU Enhanced Halt(CIE)............: Enabled

CPU Thermal Monitor 2.............: Enabled

CPU EIST Function.................: Enabled

Virtualization Technology........: Enabled // works either way. Does disabling this have any positive effect on non-VM performance?



Hot tip: In the BIOS, do this, in this order:


Load performance defaults.

Save, reboot

Load new BIOS

MAKE SURE you tell it to delete the DMI data!! (that's the option at the top line) If you don't do this it is not stable

Load performance defaults again

Save, reboot again

Now do the mods above



I'd be interested in suggestions for maybe pushing the ram to go a bit quicker (I've already boosted tRD a bit which is nice... maybe if i let that go it could have some more useful tweaks done?)... and just out of interest, how one may go about overclocking the CPU and/or RAM.


Thanks, and I hope this helps. I've tried about a million different things, so if you have a similar setup and you're still stuck, or if you want any other info, just shout out.



Link to comment
Share on other sites

I've been having similar problems getting this board to run stable on normal settings also. What is unusual is when I try to set the CPU clock to 8 and FSB to 400, the board sometimes wants to reboot then load default settings of

CPU Clock Ratio [7]

Fine Tune [.5]

Host Clock Control [Disabled]

CPU Host Fequency [450]

Host Clock Control [AUTO]

CIA2 [Disabled]

Performance Enhance[Disabled]


Memory Frequency [1333]


I loaded BIOS update F5 but I can't recall if I deleted the DMI data.


I may reflash and try a few of your suggestions. This is my 3rd Gigabyte board and the first one that has given me trouble!! :mad:

Link to comment
Share on other sites

Gday edge,


This thread is really intended to avoid the confusion I encountered by threads mixing information about different parts, and specifically target the 1333C9DHX in the X48T-DQ6, so I'm not sure your setup is well suited to be in this thread, as you're using a 400MHz FSB, and 1600MHz RAM that has different timings....


I have a few ideas, if you start up a new thread I'll get all verbose. Short version: make sure you trash the DMI when you flash it (by the way, gigabyte do say to always do that, somewhere deep in the manual, so don't fear that it's jut the advice of some random guy online (me)), Make sure command rate is 2T, I think you'll need to bump up the DDR3 and MCH and possibly FSB voltages a bit compared to us 1333 guys, and in general, just get it booting with the loosest settings you can, then change them one at a time and test.


That's a real nice rig you got there though! I'd get XP on there to start with, obviously you like a high performance PC, and Vista is not going to help there :) But yeh... don't stress man. I thought I'd say that because I was beginning to fear I'd bought stuff that was just not going to work... Once the settings are correct, it all works fine. Only problem was finding all the settings! You'll get there.


Only thing that's bothering me now, is that I fear that the automatic settings the motherboard has detected and I've left on auto, may actually be suboptimal. I'm going to go and find the detected values and update my post to show what 'auto' really is.

Link to comment
Share on other sites

thanks for this, i can finally complete a post at 1333. with these settings you mentioned above, with static read value (tRD) at 7.


however im using a Q9300 oc @ 3000. With FSB@400 and in everest i bench higher when my ram is running at the stock 7-7-7-20 @ 1066. (as ram guy mentioned i my thread.) (if u want to run yours at 1066 then find my thread and theres a screen shot of Memset with the settings they are stable at.)

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...