E8400 + DFI UT X48-T2R

[Shurakai]

Hey everyone, i'm new around here, great place by the way

Thought i start out by talking about overclocking with some of the new gear i've purchased, and the problems i'm currently having (moslty due to my lack of knowledge of the awesome x48 chipset)

Hope Clunk doesn't mind, but i thought i'd use his template for the DFI LT X48 T2R (as the title hints, i have the UT, hopefully the bios isn't much different)

CPU Feature
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

Exist Setup Shutdown: Mode 2
Shutdown after AC Loss: Disabled
CLOCK VC0 divider: AUTO
CPU Clock Ratio Unlock: Enabled
CPU Clock Ratio: 9 X
Target CPU Clock: 4050Mhz
CPU Clock: 450
Boot Up Clock: AUTO
DRAM Speed: 400/800
Target DRAM Speed: 900Mhz
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: 1.3125v
CPU VID Special Add: AUTO
DRAM Voltage Control: 2.1v
SB Core/CPU PLL Voltage: 1.51v
NB Core Voltage: 1.306v
CPU VTT Voltage: 1.1v
Vcore Droop Control: Enabled
Clockgen Voltage Control: 3.45v
GTL+ Buffers Strength: Strong
Host Slew Rate: Weak
GTL REF Voltage Control: Disabled
x CPU GTL1/3 REF Volt: 110
x CPU GTL 0/2 REF Volt: 110
x North Bridge GTL REF Volt: 110

DRAM Timing
Enhance Data transmitting: AUTO
Enhance Addressing: AUTO
T2 Dispatch: Disabled

Clock Setting Fine Delay
Ch1 Clock Crossing Setting: AUTO
DIMM 1 Clock fine delay: Current
DIMM 2 Clock fine delay: Current
Ch 1 Command fine delay: Current
Ch 1 Control fine delay: Current


Ch2 Clock Crossing Setting: AUTO
DIMM 3 Clock fine delay: Current
DIMM 4 Clock fine delay: Current
Ch 2 Command fine delay: Current
Ch 2 Control fine delay: Current

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

CAS Latency Time (tCL): 5
RAS# to CAS# Delay (tRCD): 5
RAS# Precharge (tRP): 5
Precharge Delay (tRAS): 15
All Precharge to Act: AUTO
REF to ACT Delay (tRFC): AUTO
Performance LVL (Read Delay) (tRD): AUTO

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: AUTO
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): AUTO
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

Alot of that is all just hieroglyphics to me lol

Now that's currently my 100% stable overclock, i'm loving it, 28° idle and 46-48° Prime95/Orthos (Thermalright 120 eXtreme). What i was hoping for when i purchased this lovely setup was a possible overclock of 8x500mhz, the glorius 4ghz mark with a side of sexy 1000mhz ram, hopefully this isn't just a dream with air cooling.

I've tried getting to this barrier with bascially just voltage tweaks alone, i used 1.44v on the E8400, 1.55 on the Northbridge and 2.2 on the ram, which is a pair of Corsair Dominators, rated at 5-5-5-15 1066mhz @ 2.1v (personally all these volts seem pretty extreme to me, especially on air). Sadly this just didn't cut it, every time i tweaked the volts up/down i would run Prime95/Orthos for about 1-2 minutes before the computer would lock up, forcing me to restart, and hopefully letting me get to the bios, if not i had to take the battery out to reset the bios.

Well that about sums up my little burden, hopefully i'll have my system specs all listed before everyone gets a good read of this, anyway, thanks in advance for any advice/tips/pointers anyone has for me

(Oh and just holler if i've left out any info, i'll gladly get any necessary things asap for ya)

Edit: Forgot to mention i used the 333/667 strap when trying out 8x500mhz

[Clunk]

Welcome to the forums

Try some VTT and NB voltage, that should help stabilize things.

[Shurakai]

Once again, fast reply

So you think 1.55v on the northbridge is a little low? sounds fair enough to me, just a little worried about going too far, i really don't want to hurt such a beautiful board

Now this VTT you talk about, i've never actually encountered it before, i've been reading up about it, but it still seems to fly right over my head, with my previous attempts at 8x500mhz i've left this at stock, is there a limit or an amount i should go up by?

Also, thanks in advance mate

[Clunk]

Sorry, I was going off the template. Are they just my settings?

Please fill out the template with your highest stable settings, or your failed 4ghz settings.

[Shurakai]

Ah, sorry about that, yeah, i should of included my failed settings aswell, currently you're seeing the 24/7 settings i'm using at the moment. I'll quickly whip up my most stable (but still failed) 8x500mhz template for ya

Here we go:

CPU Feature
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

Exist Setup Shutdown: Mode 2
Shutdown after AC Loss: Disabled
CLOCK VC0 divider: AUTO
CPU Clock Ratio Unlock: Enabled
CPU Clock Ratio: 8 X
Target CPU Clock: 4000Mhz
CPU Clock: 500
Boot Up Clock: AUTO
DRAM Speed: 333/667
Target DRAM Speed: 1001Mhz
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: 1.4v (Shows up as 1.44v in CPU-Z)
CPU VID Special Add: AUTO
DRAM Voltage Control: 2.160v
SB Core/CPU PLL Voltage: 1.51v
NB Core Voltage: 1.555v
CPU VTT Voltage: 1.1v
Vcore Droop Control: Enabled
Clockgen Voltage Control: 3.45v
GTL+ Buffers Strength: Strong
Host Slew Rate: Weak (Actually this may have been Strong, as i heard it was better on the 45nm processors)
GTL REF Voltage Control: Disabled
x CPU GTL1/3 REF Volt: 110
x CPU GTL 0/2 REF Volt: 110
x North Bridge GTL REF Volt: 110

DRAM Timing
Enhance Data transmitting: AUTO
Enhance Addressing: AUTO
T2 Dispatch: Disabled

Clock Setting Fine Delay
Ch1 Clock Crossing Setting: AUTO
DIMM 1 Clock fine delay: Current
DIMM 2 Clock fine delay: Current
Ch 1 Command fine delay: Current
Ch 1 Control fine delay: Current


Ch2 Clock Crossing Setting: AUTO
DIMM 3 Clock fine delay: Current
DIMM 4 Clock fine delay: Current
Ch 2 Command fine delay: Current
Ch 2 Control fine delay: Current

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

CAS Latency Time (tCL): 5
RAS# to CAS# Delay (tRCD): 5
RAS# Precharge (tRP): 5
Precharge Delay (tRAS): 15
All Precharge to Act: AUTO
REF to ACT Delay (tRFC): AUTO
Performance LVL (Read Delay) (tRD): AUTO

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: AUTO
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): AUTO
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

There we have it, no advanced tweaking really, just simple voltage modification. Sadly as i've said, this is unstable, and every time i stress, it locks up. VTT sounds like a good bet Clunk, still no idea what it really is, but i'm up for trying anything to see this work

Thanks again mate

[Clunk]

CPU VTT Voltage: 1.211v

Try adding to that.

[Shurakai]

Very sorry, it seems some of the information is incorrect (i've now edited the above posts by me)
Execute Disable Bit and Virtualization Technology are both enabled in both of these scenarios
Not to mention i did get a bit lazy, CPU VTT Voltage default is actually 1.1v on the E8400, so you still think i should put it up? Just out of curiosity in what increments shall i do this?

Sorry about being a bit misleading, continuous thanks to you mate

[Clunk]

You may find that you don't need much extra VTT, on the other hand, you might need a few notches and find yourself at 1.3v or so....experimentation is the key here

[Shurakai]

Clunk, i hope you don't take this the wrong way, but... I LOVE YOU MAN!!!, upping the VTT to 1.18 has me running stable, i even have the CPU at 1.36v, alot lower than i could hope for, northbridge is at 1.55, but i'll be tweaking that to see if i can get it any lower later on



You're the best mate!

Just two weird things i'd like to report, System Properties reports my CPU is at 4.5ghz... i wish, and so does Orthos, i don't suppose there's a reason behind this? Oh and other programs like CPU-Z and Real Temp all say the correct 4ghz, just wondering, doesn't really bother me

[Clunk]

Some software does tend to report the actual MHz wrong, especially if you have adjusted the the multi downwards, it tends to not realise and calculates your total speed without taking into account the lower multi. Don't worry about that

Anyway, glad you got it stable