Official DFI LanParty UT X38-T2R(and LT) Discussion/Review/Overclock/Guide Thread

[Razor_Blade]

OK, I am taking notes. VTT? I am really happy with my current overclock, but at 1.5 volts, I would expect more speed. (or less volts, either way)

[crazyea]

You know, I read that article and it did nothing for me. I screwed around with GTL settings until my eyes hurt. I guess this is just my n00bness showing through, but I cant even get stable at 3.6 without 1.46+ volts to the cpu and Vdroop control disabled. What settings are you guys using for voltage on the other chips? VTT? Is having 4 DIMM's really making my overclock that much more unstable?

Can one of you with a 3.8+ Ghz clock post up your bios settings (especially if you have 4 DIMMs)? I am at a loss. Your help is appreciated.

My specs are very similiar to yours.

I am now onto a different cpu, but this is the best I can do from memory.....
A couple you will need to adjust until it looks like the screen shot.

CPU Feature Page
Thermal Management Control................Enabled
PPM (EIST) Mode...........................Disabled
Limit CPUID MaxVal........................Disabled
CIE Function..............................Disabled
Execute Disable Bit.......................Enabled
Virtualization Technology.................Enabled
Core Multi-Processing.....................Enabled

Main BIOS Page
Exist Setup Shutdown......................Mode 2
Shutdown After AC Loss....................Disabled
O. C. Fail Retry Counter..................0
CLOCK VC0 Divider.........................Auto
CPU Clock Ratio...........................9x
CPU Clock.................................422 MHz
Boot Up Clock.............................Auto
DRAM Speed................................333/800
PCIE Clock................................100 MHz
PCIE Slot Config..........................1X 1X

CPU Spread Spectrum.......................Disabled
PCIE Spread Spectrum......................Disabled
SATA Spread Spectrum......................Disabled

Voltage Setting Page 
CPU VID Control...........................As per screen in windows
CPU VID Special Add.......................Auto
DRAM Voltage Control......................2.05v
SB Core/CPU PLL Voltage...................1.510V
NB Core Voltage...........................As per screen in windows
CPU VTT Voltage...........................As per screen in windows
VCore Droop Control.......................Enabled
Clockgen Voltage Control..................3.45V
GTL+ Buffers Strength.....................Strong
Host Slew Rate............................Weak
GTL REF Voltage Control...................Disabled
CPU GTL1/3 REF Volt.......................N/A
CPU GTL 0/2 REF Volt......................N/A
North Bridge GTL REF Volt ................N/A

DRAM Timing Page - All Auto

Screen 1 - 3.8ghz


I also have a screen with 425x9.....

Screen 2 -3.825ghz

[PhilDoc]

try starting with a 69%gtl for the cpus and 68% for the NB

so for 1.46 start with 101/99

nd lets say do 1.5 for NB with 102

How did you arive at 69% is equal to 101/99 for cpu at 1.46 and 102 for 1.5 on NB. After reading the Anand article they seem to base GTL's off of vtt. They have a reference chart, but don't tell how they arived at those numbers. I've been trying to use their charts and going off of vtt.

[Razor_Blade]

Ditto. I thought it was based on VTT, hence me asking for VTT values. I have been using the edge of stability charts for mine, but my system got a hell of alot more stable after I disabled manual GTL settings.

[PhilDoc]

Just looked at the edge of stabiltiy charts. The numbers are very similar to Anands, but edge's charts have more voltage settings. Thanks for the heads up, I'll use their charts for now. At some point I'd love to be able to calculate my own chart.


PS. try lowering the suggested value, I've had some minor success doing that.

[Praz]

Ditto. I thought it was based on VTT, hence me asking for VTT values. I have been using the edge of stability charts for mine, but my system got a hell of alot more stable after I disabled manual GTL settings.

The charts only shows what values are needed to maintain the Intel specified 67% ratio of VTT to GTL. Most 65nm processorss are happier at a GTL value slightly higher then this. Any chart is going to be dead-on accurate for the board the voltages were taken from only. As a general reference the chart you are referring to may be off +/- 5 from one board to the next for one or more of the following reasons.

Difference between set VTT voltage in the BIOS compared to actual voltage.
The tolerance of the VTT divider circuit from which the GLT Reference voltages are derived.
The tolerance of the GTL Reference voltage divider circuit.
Trace impedance.
Individual Northbridge
Individual CPU.

The charts only shows what values are needed to maintain the Intel specified 67% ratio of VTT to GTL. Most 65nm processors are happier at a GTL value slightly higher then this. The GTL Reference voltages are not only based on VTT but as noted above are directly derived from it. The only thing of comparison that matters when setting the GTL values is the value of VTT.

[Mic]

Here's my bios for 450 FSB with a Q6600 and 4x1 GB OCZ 9200 Flex

CPU Feature Page
Thermal Management Control................Disabled
PPM (EIST) Mode...........................Disabled
Limit CPUID MaxVal........................Disabled
CIE Function..............................Disabled
Execute Disable Bit.......................Enabled
Virtualization Technology.................Disabled
Core Multi-Processing.....................Enabled

Main BIOS Page
Exist Setup Shutdown......................Mode 2
Shutdown After AC Loss....................Disabled
O. C. Fail Retry Counter..................0
CLOCK VC0 Divider.........................Auto
CPU Clock Ratio...........................9x
CPU Clock.................................450 MHz
Boot Up Clock.............................Auto
DRAM Speed................................266/667
PCIE Clock................................100MHz
PCIE Slot Config..........................1X 1X

CPU Spread Spectrum.......................Disabled
PCIE Spread Spectrum......................Disabled
SATA Spread Spectrum......................Disabled

Voltage Setting Page 
CPU VID Control...........................1.39V
CPU VID Special Add.......................Auto
DRAM Voltage Control......................2.35V
SB Core/CPU PLL Voltage...................1.510V
NB Core Voltage...........................1.48V
CPU VTT Voltage...........................1.52V
VCore Droop Control.......................Enabled
Clockgen Voltage Control..................3.45V
GTL+ Buffers Strength.....................Strong
Host Slew Rate............................Weak
GTL REF Voltage Control...................Disabled
CPU GTL1/3 REF Volt.......................N/A
CPU GTL 0/2 REF Volt......................N/A
North Bridge GTL REF Volt ................N/A

DRAM Timing Page
Enhance Data Transmitting.................Fast
Enhance Addressing........................Fast
T2 Dispatch...............................Enabled
Clock Setting Fine Delay..................Listed Below
CAS Latency Time (tCL)....................5
RAS# to CAS# Delay (tRCD).................5
RAS# Precharge (tRP)......................4
Precharge Delay (tRAS)....................9
All Precharge to Act......................4
REF to ACT Delay (tRFC)...................32
Performance Level.........................8
Read Delay Phase Adjust...................Listed Below
MCH ODT Latency...........................2
Write to PRE Delay (tWR)..................12
Rank Write to Read (tWTR).................10
ACT to ACT Delay (tRRD)...................3
Read to Write Delay (tRDWR)...............8
Ranks Write to Write (tWRWR)..............AUTO
Ranks Read to Read (tRDRD)................AUTO
Ranks Write to Read (tWRRD)...............AUTO
Read CAS# Precharge (tRTP)................3
ALL PRE to Refresh........................5

Read Delay Phase Adjust Page
Channel 1 Phase 0 Pull-In.................Enabled
Channel 1 Phase 1 Pull-In.................Enabled
Channel 1 Phase 2 Pull-In.................Enabled
Channel 1 Phase 3 Pull-In.................Enabled
Channel 1 Phase 4 Pull-In.................Enabled

Channel 2 Phase 0 Pull-In.................Enabled
Channel 2 Phase 1 Pull-In.................Auto
Channel 2 Phase 2 Pull-In.................Enabled
Channel 2 Phase 3 Pull-In.................Enabled
Channel 2 Phase 4 Pull-In.................Enabled

Clock Setting Fine Delay Page
Ch1 Clock Crossing Setting................More Aggressive

Ch2 Clock Crossing Setting................More Aggressive

Ch1Ch2 CommonClock Setting................More Aggressive

Ch1 RDCAS GNT-Chip Delay..................Auto
Ch1 WRCAS GNT-Chip Delay..................Auto
Ch1 Command to CS Delay...................Auto

Ch2 RDCAS GNT-Chip Delay..................Auto
Ch2 WRCAS GNT-Chip Delay..................Auto
Ch2 Command to CS Delay...................Auto

CPU temp around -30 degrees, System 40, chipset 48.

With air cooling I got it running nicely at 3.8Ghz with my Mach II GT I can't get it much above 460 FSB im pretty sure this CPU is able of doing 4.4-4.5
but the motherboard seems to hold me back. Even with 1.55 Vcore, 1.74 CPU PLL and 1.64 NB and relaxed timings I can't even get it stable at 470 FSB. Same with both 2 or 4 ram modules.
Any suggestions?

[GripS]

You just started on 100 and went 1 by 1 testing OCCT till you got it? Like 100/100/100 save>boot>test, then again?

And why some GTL settings are like 115/115/117 with 2 more on the last one?

Actually started @ 110. Moved up from there.

[jcool]

Mic, you sure your CPU can handle the high FSB? Might just try playing with GTLs more. I'll soon be able to assist you I hope, I got my Q6600 primestable at 480 FSB with WC on the Abit IX38 but am now changing to the DFI and a SS unit. If I am also stuck at 450 FSB it's the mobo (or me being not able to deal with 100+ bios settings...)

[Mic]

Should be, had it stable enough for a 3d mark test at 485 FSB on an asus maximus with 2 sticks of memory without much tweaking and 1.45 vcore. Dropping the multiplier on the x38 to 6 and i still run into the fsb wall.

[RGone]

Translation of that link is shown below.

The charts (any chart) only show what values are needed to maintain the Intel specified 67% ratio of VTT to GTL. Many 65nm processorss are happier at a GTL value slightly higher then this 67% ratio. Any chart is only going to be accurate for the specific board the voltages were taken on. Generally any reference chart you are referring to may be off +/- 5 from your board to Joe's board for one or more of the following reasons.

1. Difference between VTT voltage set in the BIOS compared to actual voltage.

2. The tolerance of the VTT divider circuit from which the GLT Reference voltages are derived. Where the definition of tolerance is thus: Leeway for variation from a standard or the permissible deviation from a specified value, often expressed as a percentage.

3. The tolerance of the GTL Reverence voltage divider circuit. Where the definition of tolerance is thus: Leeway for variation from a standard or the permissible deviation from a specified value, often expressed as a percentage.

4. Trace impedance variance from your board to Joe's board.

5. Individual Northbridge variance from your board to Joe's board.

6. Individual CPU variance from your board to Joe's board.

The charts only show what values are needed to maintain the Intel specified 67% ratio of VTT to GTL. Most 65nm processors are happier at a GTL value slightly higher then this. The GTL Reference voltages are not only based on VTT but as noted above are directly derived from it. The only thing of comparison that matters when setting the GTL values is the value of VTT.

[Jor3lBR]

Actually started @ 110. Moved up from there.

Ok I started to mess around with it starting with 105 and Enabling Vcore Drop Control, but I noticed I'm getting a lot of BSOD running wPrime with this error message:

"MACHINE_CHECK_EXCEPTION" (Windows XP 64)

Does that indicates something I have to do?

Thanks.

[flexy]

what is a safe max
B Core/CPU PLL Voltage...................1.510V
NB Core Voltage...........................1.48V
CPU VTT Voltage...........................1.52V

CPU VTT at 1.52 seems awfully high?

[Ace-a-Rue]

Translation of that link is shown below.

The charts (any chart) only show what values are needed to maintain the Intel specified 67% ratio of VTT to GTL. Many 65nm processorss are happier at a GTL value slightly higher then this 67% ratio. Any chart is only going to be accurate for the specific board the voltages were taken on. Generally any reference chart you are referring to may be off +/- 5 from your board to Joe's board for one or more of the following reasons.

1. Difference between VTT voltage set in the BIOS compared to actual voltage.

2. The tolerance of the VTT divider circuit from which the GLT Reference voltages are derived. Where the definition of tolerance is thus: Leeway for variation from a standard or the permissible deviation from a specified value, often expressed as a percentage.

3. The tolerance of the GTL Reverence voltage divider circuit. Where the definition of tolerance is thus: Leeway for variation from a standard or the permissible deviation from a specified value, often expressed as a percentage.

4. Trace impedance variance from your board to Joe's board.

5. Individual Northbridge variance from your board to Joe's board.

6. Individual CPU variance from your board to Joe's board.

The charts only show what values are needed to maintain the Intel specified 67% ratio of VTT to GTL. Most 65nm processors are happier at a GTL value slightly higher then this. The GTL Reference voltages are not only based on VTT but as noted above are directly derived from it. The only thing of comparison that matters when setting the GTL values is the value of VTT.

you have my head spinning, BOB!

[Dede99]

Tracer's off my system doesn't like them looks like, I just put in my Super Talent and all is good again, the tracer's no matter what setting I made after some time I got BSOD. What could be the cause of it I don't get it
I buyed the tracers bc I thought they work very well with this board but they don't as I found out.
any suggestions would be appreciated

[PhilDoc]

Don't know what to say, the Ballisix 8500 I have work great. One thing I did find is they don't like the 4/5 divider otherwise, I've had great luck with them.

[Jor3lBR]

Tracer's off my system doesn't like them looks like, I just put in my Super Talent and all is good again, the tracer's no matter what setting I made after some time I got BSOD. What could be the cause of it I don't get it
I buyed the tracers bc I thought they work very well with this board but they don't as I found out.
any suggestions would be appreciated

I have Tracer 8500's too and they run flawless and max out my Q6600 with 2.1v max.

I run them at 1202Mhz with 3:4 divider now, for that above 2.4v (451fsb).

They run great at 5-5-5-4-9-30 and don't seam to bother with 7 or 8 performance level.

[Dede99]

I tryed alot of things and divider's but nothing helped me, would you share your settings with me please?

[RGone]

you have my head spinning, BOB!

It seemed to be that it was not written at the entry level which equates to my level of understanding of tronics. Some of the guys are way smarter than a MS Rednake for shore. So I just read it and read it and decided to add the appropriate words/wording to indicate the charts are absolutely nothing more than a pretty good starting point and not a gawd inspired ruling. Cause iffen you members good, me was allus a little dense in me belfry...hehehehe.

Good to see you around man. RGone...

[cliffy]

Quick question if i may interupt:

Whats the better board

Asus Maximus Formula or
DFI LANPARTY LT X38-T2R

Cheers

[PhilDoc]

I tryed alot of things and divider's but nothing helped me, would you share your settings with me please?

You were probably looking for Jor3lBR's settings, but more may be helpful. I see no difference between the 8500s and the tracers. I run the settings the same for all dividers.

I set the Vdimm at 2.2v or higher depending on what I'm trying to do.

I set the divider manually. I usually run the 3/4 or 5/6, but all work for me except the 4/5.

Enhanced Data Transmitting Fast
Enhanced Addressing Fast
T2 Dispatch Disabled

For fine delay
Everything is set to auto except.

Channel 1 CLK Crossing More Agressive
Channel 2 CLK Crossing More Agressive
CH1CH2 common CLK Crossing More Agressive

The rest I have left at stock.


One thing to think about is that there's a new revison of the Ballastixs out. The use a different chip and may not work as well. I don't know if they've made it to retail or not. You can tell by looking at the modules. If they are double layered they're the old revision.

[Ace-a-Rue]

Cause iffen you members good, me was allus a little dense in me belfry...hehehehe.

Good to see you around man. RGone...

peace to you my friend.

[Dede99]

Thank you PhilDoc, I'll try that tomorrow but I don't think I'll get luck since I didn't OC the RAM or any and it wasn't stable. About the layers I just checked them out and there are only chips on one side only.!

[PhilDoc]

Thank you PhilDoc, I'll try that tomorrow but I don't think I'll get luck since I didn't OC the RAM or any and it wasn't stable. About the layers I just checked them out and there are only chips on one side only.!

Anytime. It does sound like you got the new revision. Here's the thread about them in the News section. There's a link to a review of them. It may give you some insight on how to OC them.

http://www.xtremesystems.org/forums/...d.php?t=176432

[Smokin_Joe]

I have a question and sorry if this has been mentioned already but i really don't have the time to go through 74 pages right now. :p I want to get the LT and i'm wondering, can a TRUE be mounted so the fan is blowing towards my rear exhaust fans? Also, will i have enough clearance using a Thermalright HR-03 Plus + a 38mm fan on an 8880GTS 640Mb with a soundcard on the bottom pci slot?