Pushing e8400 + Asus p5q to 4.1ghz

[Apocalypse23]

Hello all! So after my old DFI lanparty decided to crap out on me, I decided to make a quick purchase and ended up with an e8400 E0 stepping, ASUS p5q Pro (1613bios) and Corsair XMS2 Dominator TWIN2X4096-8500C5 ram. I'm also using an OCZ Vendetta 2 heatsink resulting in temps idling at 38C and pushing up to 60-65C max under orthos load.

I'm trying to get it up to 4.1ghz stable, I am using the following settings and the comp works fine in terms of applications, games, etc. It does, however, fail Orthos. Wondering if I can get some tips =D

CPUz Screenshots


BIOS settings:

JumperFree Configuration Settings
AI Overclock tuner: MANUAL
CPU Ratio Setting: 9
FSB Strap to North Bridge: AUTO
FSB Frequency: 456
PCI-E Frequency: 100
DRAM Frequency: DDR2-1095


DRAM Timing Control: MANUAL
CAS# Latency: 5
DRAM RAS# to CAS# Delay: 5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge: AUTO
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: AUTO

DRAM Static Read Control: Disabled
DRAM Read Training: Disabled
MEM. OC Charger: ENABLED
AI Clock Twister: AUTO
AI Transaction Booster : AUTO

CPU Voltage: 1.34375 (1.328 in cpuz)
CPU GTL Reference : AUTO
CPU PLL Voltage: AUTO
FSB Termination Voltage: AUTO
DRAM Voltage: 2.06
NB Voltage: 1.26
SB Voltage: AUTO
PCIE SATA Voltage: AUTO

Load Line Calibration: AUTO
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
CPU Clock Skew : AUTO
NB Clock Skew : AUTO
CME : OPTIMIZED

Advance CPU Settings
CPU Ratio Setting: 9
C1E Suppport: Disabled
Max CPUID Value Limit: Disabled
Intel® Virtualization Tech: ENABLED
CPU TM Function: ENABLED
Execute Disable Bit: ENABLED


CPUZ Memory Tab:

Corsair Dominator 2x2gb TWIN2X4096-8500C5D (rated at 2.1V @ 1066mhz)

Dram Freq: 547Mhz
FSB/DRAM: 5:6
Cl: 5
tRCD: 5
tRP: 5
tRAS: 15
CR : 2T




I hear that with these 45nm chips, pushing up the core voltage isn't always the best solution, so i'm hoping for some advice =D
Thanks!

 

[Tempered81]

1:1 ram, or try load line calibration on/off.

I hate to say it because you say no more volts, but: more vdimm, more vcore, more nb voltage

edit: Check out these volts and settings for 4.9g 577 x 8.5 on a P5K premium:
http://www.xtremesystems.org/f...814&stc=1&d=1231809583

 

[cmdrdredd]

CPU GTL Reference : AUTO
CPU PLL Voltage: AUTO
FSB Termination Voltage: AUTO


Try setting these to an actual value.

 

[BTRY B 529th FA BN]

I made 4.050Ghz on my Asus P5Q Premium

1.20vcore
LLC enabled
NB 1.5v
Ram at rated volts. 900Mhz 4.4.4.12 2.1v

C1 stepping

I think what the trick for me was the NB volts. It failed at 1.20v until I upped the NB volts to 1.5v

 

[yh125d]

I'd step up the NB voltage to 1.3, and vCore to 1.36 in bios and you should be stable

 

[Apocalypse23]

Thanks for all the responses guys! I put Load line calibration to enabled, increased vcore to 1.3500 (1.328 on cpuz) and NB voltage to 1.33. Seems to be orthos stable for a few hours now at 4.1ghz still.

My temps max at 69C ..avg at 66C.

I'm not sure if i understand this vdroop thing, if my bios vcore is 1.350 and CPUz reads it as 1.328 .. which should I trust to be the actual voltage?

 

[yh125d]

There will always be a little voltage lost, so the CPU-z is probably more accurate.

 

[Tempered81]

Trust CPU-z. "Vdroop" or V-offset or "V-drop" is the difference in voltage you're missing between the bios setting, and actual read from within cpu-z

 

[Apocalypse23]

Thanks, that makes sense, wasnt sure what to trust.

It seems pretty stable so far, i'm not having any issues with Orthos or my benchmarks, been playing with it a little but and tried for 4.20 (466x9) with 1.35vcore (cpuz) and 1.4 NB voltage but ended up failing Orthos. Going to play around with it a bit more.

Also, cmdrdredd, to be honest, i'm not sure where to begin with the CPU GTL/PLL and FSB termination values. =/


btw, ignore the specs in my sig, thats for a different comp setup =)

 

[Rotax]

Some others and I think I have found 8.5 multiplier to produce better results..

I'm pretty sure this board/NB really needs more voltage to get much beyond 460 FSB.
I just don't like going much beyond 1.3v w/o active cooling...

I leave GTL Auto, PLL 1.52-1.54 (1.50 and Auto way over volts on this board in the range of 1.58v I think it was), FSB 1.14-1.18 (I've ran this up to 1.24 before...)

I'm seeing similar load temps using a 100 Tjmax w/ Orthos (mid 60s, give or take)
@ 465x8.5 = 3953
1.320v CPUz loaded (which is 1.33125 in the BIOS i think)


IntelBurnTest passed 5/5, and ~2h of CoD4

I've been trying to work the FSB up further and use the 8x multi, but think I'm hitting an FSB wall around 470-475...which comes back to more NB voltage.


I'm to the point where I'm not sure its worth all the extra voltage/heat to get 4ghz...
I can do ~3.8ghz with less voltage and 5-8c less load temps...

 

[Piano Man]

The only things I see are maybe the FSBRAM setting or Temps holding you back. Remember Intel states that its E8400 processors can do 1.3625V, so can probably try that. I haven't messed with my settings too much myself other than VCore. I just decided on 467FSB, punched it in, and kept increasing my VCore until I could run Orthos for several hours. Running Orthos for several hours at 4.22GHz, I get up to 52C.

 

[M1A]

Take into account vdroop and give it some more volts. For 4.1 and above you need volts.........
As in my sig I also run 467FSB and try to get back to the 9 multplier.
Have Fun

 

[n7]

Originally posted by: Apocalypse23
Hello all! So after my old DFI lanparty decided to crap out on me, I decided to make a quick purchase and ended up with an e8400 E0 stepping, ASUS p5q Pro (1613bios) and Corsair XMS2 Dominator TWIN2X4096-8500C5 ram. I'm also using an OCZ Vendetta 2 heatsink resulting in temps idling at 38C and pushing up to 60-65C max under orthos load.

I'm trying to get it up to 4.1ghz stable, I am using the following settings and the comp works fine in terms of applications, games, etc. It does, however, fail Orthos. Wondering if I can get some tips =D

CPUz Screenshots


BIOS settings:

JumperFree Configuration Settings
AI Overclock tuner: MANUAL
CPU Ratio Setting: 9
FSB Strap to North Bridge: AUTO
FSB Frequency: 456
PCI-E Frequency: 100
DRAM Frequency: DDR2-912 - Use this underclocked until you find CPU's max; then worry about overclocking your RAM


DRAM Timing Control: MANUAL
CAS# Latency: 5
DRAM RAS# to CAS# Delay: 5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge: AUTO
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: 60 - Tighten this after you finish CPU & RAM OC

DRAM Static Read Control: Disabled
DRAM Read Training: Disabled
MEM. OC Charger: ENABLED
AI Clock Twister: AUTO (You'll eventually want to set this to manual, so you can then...)
AI Transaction Booster : AUTO (...adjust this manually, & set it as low as you stably can - this value is your tRD setting)

CPU Voltage: 1.34375 (1.328 in cpuz) - Up as needed depending on how high you are willing to go for temps/vcore/etc
CPU GTL Reference : AUTO
CPU PLL Voltage: 1.5 - 1.58
FSB Termination Voltage: 1.2 - 1.3 - increase for higher FSB stability; lower as much as you can AFTER getting CPU stable
DRAM Voltage: 2.02 or lower - P5Qs overvolt by 0.08v, so 2.02v = 2.1v etc, & you really don't need more than that for PSC-based memory, OCing or not
NB Voltage: 1.2 - 1.36 - increase for higher FSB/NB stability; lower as much as you can AFTER getting CPU & RAM stable
SB Voltage: AUTO
PCIE SATA Voltage: AUTO

Load Line Calibration: Enable to keep vcore about the same when idle or load; Disable to allow vdroop (vcore will drop alot during load)
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
CPU Clock Skew : AUTO
NB Clock Skew : AUTO
CME : OPTIMIZED

Advance CPU Settings
CPU Ratio Setting: 9
C1E Suppport: Disabled
Max CPUID Value Limit: Disabled
Intel® Virtualization Tech: ENABLED
CPU TM Function: ENABLED
Execute Disable Bit: ENABLED


CPUZ Memory Tab:

Corsair Dominator 2x2gb TWIN2X4096-8500C5D (rated at 2.1V @ 1066mhz)

Dram Freq: 547Mhz
FSB/DRAM: 5:6
Cl: 5
tRCD: 5
tRP: 5
tRAS: 15
CR : 2T




I hear that with these 45nm chips, pushing up the core voltage isn't always the best solution, so i'm hoping for some advice =D
Thanks!

See bold additions to your settings please.
You might need to work on GTLs if you want to go for really high FSBs: http://www.xtremesystems.org/f...howthread.php?t=202292