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

[zfactor]

hmmm when i first asked everyone told me not to do the flash if i have a china mobo.. they said it was fine with the taiwan ones though?? has this changed? it wasn't about the bios chip it was due to china ones having issues with nb voltage

[Jor3lBR]

The worst that can happen is that you would have a X38 flashed to a X48 with a NB overvolting issue.

I used my X38 with the old bios (with the NB crazy volts) for very long time and that never set me back. You just have to set the NB and then go to BIOS and see the voltage repeating that till you get to the desired.

By no means I am encouraging you to do this, I'm just answering your questions.

My X38 still has the X38 bios and I never tried to flash because it's a 24/7 machine not OC.

hmmm when i first asked everyone told me not to do the flash if i have a china mobo.. they said it was fine with the taiwan ones though?? has this changed? it wasn't about the bios chip it was due to china ones having issues with nb voltage

[zsamz_]

Yes zsam and others have, some had taiwan others china but they have the same sst bios chip so it really doesn't matter.

I would grab a spare pre-flashed bios chip first just in case:
http://myworld.ebay.com/biosdepot/

Just specify the mobo manufacturer and model and the bios you want and they will do the rest

that bois chip guy is the best real cheap n real reliable i been dealin with him for 6 years now

[zfactor]

so zsamz is there still a issue flashing the china mobo in your opinion? i just grabbed a bios chip from that seller

[zsamz_]

its same bios just nb overvolting
x48 is just a higher bin in my opinion
i still waitin to see someone go over 555fsb on x38 or x48

[Jor3lBR]

its same bios just nb overvolting
x48 is just a higher bin in my opinion
i still waitin to see someone go over 555fsb on x38 or x48

Hey Sam, acording to this EXPANDER guy he got 680+ on the P35 and 600+ on the X38:
http://www.xtremesystems.org/forums/...5&postcount=42

Would be nice to see some SS results.

[Rinaun]

anyone else have corruption issues with this board and overclocking? I hit 3.8 with mine prime/occt stable for 2+ hours, and I still get some firefox crashes, and I cant install even brand new games because of copy issues. I'm starting to think its vista again causing issues. Any advice would be nice.
Q6600
2gbx2 pc28000 g.skill

[flexy]

well yeah, i flashed the x48 bios. Just make 100% certain not to use the "wrong" NB voltage settings and always doeblecheck what bios reads. Not worth it imho, X38 bios is safer.

re: settings to tight, board sometimes wont boot:
Well my GTL is set manually - but i have all phases pulled it except one. Is there a recommendation what phases to pull in and what to leave at default?

[t_ski]

EDIT #2: Still not totally stable. Just went to run 3DM06 to compare one 3870x2 versus two @ 3.6 GHz, and the system locked up hard. I may have lost my 3DM06 install lol

Well, I may have figured that out. Seems I could not load 3DM06 even @ stock, so I did some more looking. IDK if I installed the hotfix when I installed Vista, but I installed it tonight and 3DM06 loads and runs fine. I knew something was up when I could run 3D games but not 3DM06.

Any advice on where to tweak next?

CPU Feature Page
Thermal Management Control................Disabled
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.................................400 MHz
Boot Up Clock.............................Auto
DRAM Speed................................333/800 <- DDR2-960
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...........................1.37500V
CPU VID Special Add.......................Auto
DRAM Voltage Control......................2.23V (BIOS shows 2.2v)
SB Core/CPU PLL Voltage...................1.510V
NB Core Voltage...........................1.504V
CPU VTT Voltage...........................1.453V
VCore Droop Control.......................Enabled
Clockgen Voltage Control..................3.45V
GTL+ Buffers Strength.....................Strong
Host Slew Rate............................Weak
GTL REF Voltage Control...................Enabled
CPU GTL1/3 REF Volt.......................130
CPU GTL 0/2 REF Volt......................120
North Bridge GTL REF Volt ................100

DRAM Timing Page
Enhance Data Transmitting.................Fast
Enhance Addressing........................Fast
T2 Dispatch...............................Auto
Clock Setting Fine Delay..................Listed Below
CAS Latency Time (tCL)....................5
RAS# to CAS# Delay (tRCD).................5
RAS# Precharge (tRP)......................4
Precharge Delay (tRAS)....................12
All Precharge to Act......................5
REF to ACT Delay (tRFC)...................26
Performance Level.........................7
Read Delay Phase Adjust...................Listed Below
MCH ODT Latency...........................Auto
Write to PRE Delay (tWR)..................11
Rank Write to Read (tWTR).................11
ACT to ACT Delay (tRRD)...................3
Read to Write Delay (tRDWR)...............8
Ranks Write to Write (tWRWR)..............4
Ranks Read to Read (tRDRD)................5
Ranks Write to Read (tWRRD)...............4
Read CAS# Precharge (tRTP)................3
ALL PRE to Refresh........................5

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

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

Clock Setting Fine Delay Page
Ch1 Clock Crossing Setting................Auto
DIMM 1 Clock fine delay...................Current 156ps
DIMM 2 Clock fine delay...................Current 534pd
DIMM 1 Control fine delay.................Current 601ps
DIMM 2 Control fine delay.................Current 356ps
Ch 1 Command fine delay...................Current 868ps

Ch2 Clock Crossing Setting................Auto
DIMM 3 Clock fine delay...................Current 156
DIMM 4 Clock fine delay...................Current 467
DIMM 3 Control fine delay.................Current 445
DIMM 4 Control fine delay.................Current 434
Ch 2 Command fine delay...................Current 868

Ch1Ch2 CommonClock Setting................Auto

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

[Rinaun]

Well, I may have figured that out. Seems I could not load 3DM06 even @ stock, so I did some more looking. IDK if I installed the hotfix when I installed Vista, but I installed it tonight and 3DM06 loads and runs fine. I knew something was up when I could run 3D games but not 3DM06.

Any advice on where to tweak next?

Maybe try setting the commonclock setting in the"clock setting fine delay" options on all to More Aggressive and see if you get better 3dmarks? Just a stab, since I've heard it gives a bit of performance.

[t_ski]

Thanks for the suggestion. Mind you, at this time I am mostly going for stability and lower voltages...

[Rinaun]

Thanks for the suggestion. Mind you, at this time I am mostly going for stability and lower voltages...

Then deff. try adjusting the cpu special add value, as I've heard if you mix and match correctly you can use less vcore somewhere in these forums

[deadman'sclick]

Well, I may have figured that out. Seems I could not load 3DM06 even @ stock, so I did some more looking. IDK if I installed the hotfix when I installed Vista, but I installed it tonight and 3DM06 loads and runs fine. I knew something was up when I could run 3D games but not 3DM06.

Any advice on where to tweak next?

CPU Feature Page
Thermal Management Control................Disabled
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.................................400 MHz
Boot Up Clock.............................Auto
DRAM Speed................................333/800 <- DDR2-960
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...........................1.37500V
CPU VID Special Add.......................Auto
DRAM Voltage Control......................2.23V (BIOS shows 2.2v)
SB Core/CPU PLL Voltage...................1.510V
NB Core Voltage...........................1.504V
CPU VTT Voltage...........................1.453V
VCore Droop Control.......................Enabled
Clockgen Voltage Control..................3.45V
GTL+ Buffers Strength.....................Strong
Host Slew Rate............................Weak
GTL REF Voltage Control...................Enabled
CPU GTL1/3 REF Volt.......................130
CPU GTL 0/2 REF Volt......................120
North Bridge GTL REF Volt ................100

DRAM Timing Page
Enhance Data Transmitting.................Fast
Enhance Addressing........................Fast
T2 Dispatch...............................Auto
Clock Setting Fine Delay..................Listed Below
CAS Latency Time (tCL)....................5
RAS# to CAS# Delay (tRCD).................5
RAS# Precharge (tRP)......................4
Precharge Delay (tRAS)....................12
All Precharge to Act......................5
REF to ACT Delay (tRFC)...................26
Performance Level.........................7
Read Delay Phase Adjust...................Listed Below
MCH ODT Latency...........................Auto
Write to PRE Delay (tWR)..................11
Rank Write to Read (tWTR).................11
ACT to ACT Delay (tRRD)...................3
Read to Write Delay (tRDWR)...............8
Ranks Write to Write (tWRWR)..............4
Ranks Read to Read (tRDRD)................5
Ranks Write to Read (tWRRD)...............4
Read CAS# Precharge (tRTP)................3
ALL PRE to Refresh........................5

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

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

Clock Setting Fine Delay Page
Ch1 Clock Crossing Setting................Auto
DIMM 1 Clock fine delay...................Current 156ps
DIMM 2 Clock fine delay...................Current 534pd
DIMM 1 Control fine delay.................Current 601ps
DIMM 2 Control fine delay.................Current 356ps
Ch 1 Command fine delay...................Current 868ps

Ch2 Clock Crossing Setting................Auto
DIMM 3 Clock fine delay...................Current 156
DIMM 4 Clock fine delay...................Current 467
DIMM 3 Control fine delay.................Current 445
DIMM 4 Control fine delay.................Current 434
Ch 2 Command fine delay...................Current 868

Ch1Ch2 CommonClock Setting................Auto

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

try droping ure vtt right down to 1.35 for a 3.6Ghz setting on a quad. if u find the lower vtt is causing reboots just add more VID instead of more vtt.

looking at how uve set the GTL's looks a little off 130-120-100. from what i gather they are normally more simular. just sum examples, nothing to do with ure current vtt setting 95-94-94 or 96-95-96

try setting the MCH ODT latency on 2 , well between 1-3

also try enableing all the powersaving cpu settings, like on a stock mobo & then adding ure core cpu volts using the special vid add instead of the cpu vid control. saves pumping stable o/c voltage through the cpu when its doing nothing.

[eva2000]

It's my first time using my new QX9650 L739A640 quad core (different to my QX9650 L739A644) on DFI LT X38 and was wondering what max FSB have you guys achieved and what voltages/bios settings it took to get there ?

So far seems 450FSB is the ceiling I have to work on breaking as 445FSB seems fine for QX9650 L739A640. Pretty low compared to my QX9650 L739A644 but on Asus Blitz Formula and Asus Blitz Extreme motherboard which hits 465-470FSB easy). But haven't used QX9650 L739A644 on DFI LT X38 yet.

Click on image for full screenshot

• QX9650 L739A640
• Thermalright Ultra 120 Extreme + 120x38mm Panaflo 103cfm fan

Single Super Pi 32M


Quad Super Pi 32M

DFI LP LT X38-T2R 1/11 Bios Settings


PC Health Status
Adjust CPU Temp: +4

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

Exist Setup Shutdown: Mode 2
Shutdown after AC Loss: Disabled
CLOCK VC0 divider: AUTO
CPU Clock Ratio Unlock: Enabled
CPU Clock Ratio: 9.0x
- Target CPU Clock: 4005
N/2 Ratio: Disabled
CPU Clock: 445
Boot Up Clock: AUTO
DRAM Speed: 333/667
- Target DRAM Speed: 445
PCIE Clock: 100mhz
PCIE Slot Config: 1X 1X

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
SATA Spread Spectrum: Disabled

Voltage Settings
CPU VID Control: 1.33750v
CPU VID Special Add: AUTO
DRAM Voltage Control: 2.23v
SB Core/CPU PLL Voltage: 1.51
NB Core Voltage: 1.555
CPU VTT Voltage: 1.280
Vcore Droop Control: Enabled
Clockgen Voltage Control: 3.45v
GTL+ Buffers Strength: Strong
Host Slew Rate: Weak
GTL REF Voltage Control: Enable
x CPU GTL1/3 REF Volt: 115
x CPU GTL 0/2 REF Volt: 107
x North Bridge GTL REF Volt: 88

DRAM Timing
- Enhance Data transmitting: FAST 
- Enhance Addressing: AUTO
- T2 Dispatch: Enabled 

Clock Setting Fine Delay
Ch1 Clock Crossing Setting: More Aggressive
- DIMM 1 Clock fine delay: 1470
- DIMM 2 Clock fine delay: 420
- DIMM 1 Control fine delay: 630
- DIMM 2 Control fine delay: 210
- Ch 1 Command fine delay: 980

Ch2 Clock Crossing Setting: More Aggressive
- DIMM 3 Clock fine delay: 1330
- DIMM 4 Clock fine delay: 420
- DIMM 3 Control fine delay: 630
- DIMM 4 Control fine delay: 210
- Ch 2 Command fine delay: 980

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 (where cpuz sees 1T or 2T SETTING)

CAS Latency Time (tCL): 4
RAS# to CAS# Delay (tRCD): 4
RAS# Precharge (tRP): 4
Precharge Delay (tRAS): 9
All Precharge to Act: Auto
REF to ACT Delay (tRFC): 30
Performance LVL (Read Delay) (tRD): 7

Read delay phase adjust: Enter

Ch1 Read delay phase (4~0)
- Channel 1 Phase 0 Pull-In: Auto 
- Channel 1 Phase 1 Pull-In: Auto
- Channel 1 Phase 2 Pull-In: Auto
- Channel 1 Phase 3 Pull-In: Auto
- Channel 1 Phase 4 Pull-In: Auto

Ch2 Read delay phase (4~0)
- Channel 2 Phase 0 Pull-In: Auto
- Channel 2 Phase 1 Pull-In: Auto
- Channel 2 Phase 2 Pull-In: Auto
- Channel 2 Phase 3 Pull-In: Auto
- Channel 2 Phase 4 Pull-In: Auto

MCH ODT Latency: 2
Write to PRE Delay (tWR): 15
Rank Write to Read (tWTR): 12
ACT to ACT Delay (tRRD): AUTO
Read to Write Delay (tRDWR): AUTO
Ranks Write to Write (tWRWR): AUTO
Ranks Read to Read (tRDRD): AUTO
Ranks Write to Read (tWRRD): AUTO
Read CAS# Precharge (tRTP): AUTO
ALL PRE to Refresh: AUTO

[deadman'sclick]

i can get to about 4.2Ghz on my e6750, stability becomes harder to pin after 4.1Ghz so low 500's fsb range. i wont go into voltages as their not to usefull for ure QX9650 eva2000.

@ t_ski, ignore my comment in the last post on GTL's as it seems by eva's post ure on the right track. i dont have to use them on my dualcore & had read in the thread prevously thats how the need to be set the on a 65nmquad.
i must have miss a bit on GTL's since then

[zsamz_]

Hey Sam, acording to this EXPANDER guy he got 680+ on the P35 and 600+ on the X38:
http://www.xtremesystems.org/forums/...5&postcount=42

Would be nice to see some SS results.

yup would be nice to see bios settings n sreenshot
is he the only one that went past 555fsb on this board lol i wish the overclocking gurus would try lol

[cstkl1]

Well, I may have figured that out. Seems I could not load 3DM06 even @ stock, so I did some more looking. IDK if I installed the hotfix when I installed Vista, but I installed it tonight and 3DM06 loads and runs fine. I knew something was up when I could run 3D games but not 3DM06.

Any advice on where to tweak next?

CPU Feature Page
Thermal Management Control................Disabled
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.................................400 MHz
Boot Up Clock.............................Auto
DRAM Speed................................333/800 <- DDR2-960
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...........................1.37500V
CPU VID Special Add.......................Auto
DRAM Voltage Control......................2.23V (BIOS shows 2.2v)
SB Core/CPU PLL Voltage...................1.510V
NB Core Voltage...........................1.504V
CPU VTT Voltage...........................1.453V
VCore Droop Control.......................Enabled
Clockgen Voltage Control..................3.45V
GTL+ Buffers Strength.....................Strong
Host Slew Rate............................Weak
GTL REF Voltage Control...................Enabled
CPU GTL1/3 REF Volt.......................130
CPU GTL 0/2 REF Volt......................120
North Bridge GTL REF Volt ................100

DRAM Timing Page
Enhance Data Transmitting.................Fast
Enhance Addressing........................Fast
T2 Dispatch...............................Auto
Clock Setting Fine Delay..................Listed Below
CAS Latency Time (tCL)....................5
RAS# to CAS# Delay (tRCD).................5
RAS# Precharge (tRP)......................4
Precharge Delay (tRAS)....................12
All Precharge to Act......................5
REF to ACT Delay (tRFC)...................26
Performance Level.........................7
Read Delay Phase Adjust...................Listed Below
MCH ODT Latency...........................Auto
Write to PRE Delay (tWR)..................11
Rank Write to Read (tWTR).................11
ACT to ACT Delay (tRRD)...................3
Read to Write Delay (tRDWR)...............8
Ranks Write to Write (tWRWR)..............4
Ranks Read to Read (tRDRD)................5
Ranks Write to Read (tWRRD)...............4
Read CAS# Precharge (tRTP)................3
ALL PRE to Refresh........................5

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

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

Clock Setting Fine Delay Page
Ch1 Clock Crossing Setting................Auto
DIMM 1 Clock fine delay...................Current 156ps
DIMM 2 Clock fine delay...................Current 534pd
DIMM 1 Control fine delay.................Current 601ps
DIMM 2 Control fine delay.................Current 356ps
Ch 1 Command fine delay...................Current 868ps

Ch2 Clock Crossing Setting................Auto
DIMM 3 Clock fine delay...................Current 156
DIMM 4 Clock fine delay...................Current 467
DIMM 3 Control fine delay.................Current 445
DIMM 4 Control fine delay.................Current 434
Ch 2 Command fine delay...................Current 868

Ch1Ch2 CommonClock Setting................Auto

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

hmm ure vtt is too high.
disable the vdroop.
reduce it to stock and leave the gtl at default.. wont make a difference at 400fsb for c2d
NB around 1.4 or less
and this is mainly ure prob on ure rams

Ranks Write to Write (tWRWR)..............4
Ranks Read to Read (tRDRD)................5
Ranks Write to Read (tWRRD)...............4

try 6 6 5

better if u try this

set ure NB to 1.356
GTL on Auto
Ram Setting all of them on AUTO except
T2 Disaptch = Disabled
and Set 5-5-5-15

Performance Level Auto .. no need to mess with it... as it will choose the lowest. and equal for both channel
and Choose the 266/something strap to get 1000mhz

should be piece of cake at 2.23v

[zsamz_]

hmm ure vtt is too high.
disable the vdroop.
reduce it to stock and leave the gtl at default.. wont make a difference at 400fsb for c2d
NB around 1.4 or less
and this is mainly ure prob on ure rams

Ranks Write to Write (tWRWR)..............4
Ranks Read to Read (tRDRD)................5
Ranks Write to Read (tWRRD)...............4

try 6 6 5

better if u try this

set ure NB to 1.356
GTL on Auto
Ram Setting all of them on AUTO except
T2 Disaptch = Disabled
and Set 5-5-5-15

Performance Level Auto .. no need to mess with it... as it will choose the lowest. and equal for both channel
and Choose the 266/something strap to get 1000mhz

should be piece of cake at 2.23v

advice for you
try not leaving settings on auto dont assume auto is good
some settings on auto is verry tight
best strap is 333/

[t_ski]

OK, thanks. If I stay home during the day tomorrow I might do some more tweaking. I spent most of the afternoon getting everything installed in the new case I'm testing. LOL my desk is a mess...

[flexy]

Clunk's GTL Ref Charts

Hello,

those values differ greatly from any older values i knew of.

Eg. for 1.40ish VTT i had 99 GTL ref first, and now according to Clunk's charts it's supposed to be 130.

i am on the X38 (flashed back to latest X38 bios) and Q6600. Can anyone explain the value eg. "130".....how does does this relate to 67% of 1.40 VTT?

[flexy]

hmm ure vtt is too high.
disable the vdroop.
reduce it to stock and leave the gtl at default.. wont make a difference at 400fsb for c2d
NB around 1.4 or less

whats wrong with 1.5NB and 1.45 VTT?

[flexy]

x38_314bios:

The CPU Vcore -> Auto and "Auto Add" dont work right with this bios and CPU Power management.

In the *old* X111 bios if i set VCore to "Auto" and then "Vcore Special Add 108.74%" my CPU is idle/clocked down at 1.3V....and when its under load and multi 8x it goes up to 1.46Vcore, as desired.

With the new X38_314 bios if i set to "Auto" and "108% special add" the Vcore is always at 1.46, regardless whether CPU low-power (EIST) is on (6x multi) or under load 8x.
Better power-savings with old X38111 bios!

[cstkl1]

afaik.

example on my e8500 on fsb500
on 8x500fsb
i have two choice

NB : 1.55
1.5vtt at NB GTL 80
Vdimm 2.23
NB : 1.63
or 1.2vtt at NB GTL 70
Vdimm 2.16
both at 4x1gb 1000mhz CL4 TRD 7(on both channels..)

forgot my e6850 setting last time but afaik the NB voltage and VTT wasnt that high for 400fsb

Memtest 5 pass stable.


as for the 1000mhz TRD 6 CL5 beats any strap 333/800...980..CL5 TRD 7
the cost is higher vdimm.
the advantage lower latencies and higher bandwidth.
the auto setting as no advantage in tweaking except for those 3 settings at 5-5-5 .. which will give a huge gain

http://forum.lowyat.net/index.php?sh...ost&p=16908285

[flexy]

i am really confused now.

On Anandtech http://www.anandtech.com/mb/showdoc.aspx?i=3129&p=13
they claim you need 1.6 VTT for 440-475FSB....1.6VTT sounds insane for me. I am at 442 FSB right now and "only" 1.42 VTT.

I use to keep VTT slightly under VCore, and also on Air and in general i try to keep everything at or below 1.45V...NB is at 1.5tho.
I dont think i would ever go as high as 1.6VTT

[deadman'sclick]

ive just finished testing at fsb488 x8 with vtt set at 1.39 , did a 9 hour run of dualprime64 last night night, also totally memtest stable & occt 2hour test stable.

for my cpu its vtt needs go a bit like this:

fsb450x8 1.32-1.33

fsb475x8 1.35-1.37

fsb500x8 1.4-1.42

all without gtl's being set.