**Official e8400/e8500 Retail OC Thread

[DOM.]

im fixing to get a modded Mach GT II for like $5XX range is that a good price ?

had a desuperheater coil added which gives the condenser more capacity and I also had it refilled and tuned with R507 refrigerant. Its tuned for very heavy loads now with my E8600 @ 5300Mhz 1.75v it will idle around -50c and run about -44c under full load.

just did my income tax lol

[DOM.]

whats a good DDR2 Motherboard ive been looking at the Asus Maximus II Formula & P5Q Deluxe for sometime and im going to get a new mobo but the GIGABYTE also look good but idk what to get im looking to get high FSB on Q's also

[vrdublu]

Auto overvolts on this board so try (my settings at 566):

CPU PLL Voltage: --> set 1.56-1.60 (1.60)
FSB Termination Voltage: --> set 1.22-1.26 (1.22)
DRAM Voltage: what your ram needs for the speed you are running
NB Voltage: AUTO --> set 1.26-1.4 (1.32)
NB GTL Reference: AUTO
SBridge Voltage: AUTO
PCIE SATA Voltage: AUTO

I tried these settings as you recommended with little success unfortunately. Can't even boot with less then 1.45 or so at 550fsb, this really abffles my mind, since so many report doing this at around 1.32 or so. I jacked it up to nb 1.52v and still seems aunstable. Any other ideas ??? I'm running bios 1702 if that makes any difference.

[gergregg]

I tried these settings as you recommended with little success unfortunately. Can't even boot with less then 1.45 or so at 550fsb, this really abffles my mind, since so many report doing this at around 1.32 or so. I jacked it up to nb 1.52v and still seems aunstable. Any other ideas ??? I'm running bios 1702 if that makes any difference.

Please fill out this template and we'll see what we can try.

AI Overclock tuner: Manual
CPU Ratio Setting:
FSB Strap to North Bridge: AUTO
FSB Frequency:
PCI-E Frequency:
DRAM Frequency:
DRAM CLK Skew on Channel A1: AUTO
DRAM CLK Skew on Channel A2: AUTO
DRAM CLK Skew on Channel B1: AUTO
DRAM CLK Skew on Channel B2: AUTO
DRAM Timing Control: Manual

1st Information :

CAS# Latency:
DRAM RAS# to CAS# Delay:
DRAM RAS# Precharge:
DRAM RAS# Activate to Precharge:
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: AUTO
Write Recovery Time: AUTO
Read to Precharge Time: AUTO

2nd Information :

READ to WRITE Delay (S/D): AUTO
Write to Read Delay (S): AUTO
WRITE to READ Delay (D): AUTO
READ to READ Delay (S): AUTO
READ to READ Delay (D): AUTO
WRITE to WRITE Delay (S): AUTO
WRITE to WRITE Delay (D): AUTO

3rd Information :

WRITE to PRE Delay: AUTO
READ to PRE Delay: AUTO
PRE to PRE Delay: AUTO
ALL PRE to ACT Delay: AUTO
ALL PRE to REF Delay: AUTO
DRAM Static Read Control: AUTO
DRAM Read Training: AUTO
MEM. OC Charger: AUTO
AI Clock Twister: AUTO
AI Transaction Booster: Manual

Common Performance Level []

Pull-In of CHA PH1: DISABLED
Pull-In of CHA PH2: DISABLED
Pull-In of CHA PH3: DISABLED
Pull-In of CHA PH4: DISABLED
Pull-In of CHB PH1: DISABLED
Pull-In of CHB PH2: DISABLED
Pull-In of CHB PH3: DISABLED
Pull-In of CHB PH4: DISABLED

CPU Voltage:
CPU GTL Voltage Reference (0/2): AUTO
CPU GTL Voltage Reference (1/3): AUTO
CPU PLL Voltage:
FSB Termination Voltage:
DRAM Voltage:
NB Voltage:
NB GTL Reference: AUTO
SBridge Voltage:
PCIE SATA Voltage:

Load Line Calibration:
CPU Spread Spectrum:
PCIE Spread Spectrum:
CPU Clock Skew : Auto
NB Clock Skew : Auto
CPU Margin Enhancement: Performance Level

[Falkentyne]

Well since the other week with the heatwave here and my BSOD...
I cant get my E8400 to 4320mhz/480FSB/1.280vcore

Im currently on 4185mhz/465FSB/1.296vcore, and thats about it. I CBF'd at the moment edging it up, to find the total limit

So it seems now i cant clock the CPU back to the original setting that was stable in cooler weather (and its cooler again now)
Every time i run Prime is fails one of the CPU workers in less than 5mins.

Any idea what would be causing it?
Ram or CPU im guessing... fk this is annoying as it was stable perfectly and passed hours on hours of every test under the sun.

Don't keep torturing these chips. Listen to Lee. He keeps telling you guys not to keep torturing these chips like this. Run IBT a couple of times, then just run Orthos Blend/Memtest, and just *use* the computer and enjoy it.

Running these stress tests (that stress the CPU far more than anything else) repeatedly, especially IBT and sometimes prime small fft on hours/days on end, is not really healthy for these chips when they're pushed too hard. Your chip might be degrading from it. Seen it happen plenty enough. One guy degraded from 3.6 to 3.4 ghz (needed higher vcore--1.34 vs 1.32v) for 3.6 after a few weeks of repeated IBT's. And 1.32v isn't even that high.

Yes it's possible for chips to degrade even at lower voltages.
All chips respond differently, so what may happen to 1 person might not happen to someone else. Board timings/settings may play a part too.

There have been cases where it was the northbridge going south, or RAM, but memtest would pick that up (you'd probably need something a bit tougher on the NB to pick up problems there, like Orthos/prime Blend).

[vrdublu]

Ok here are my settings as seen in the bios. I can't even boot up without less then 1.42 NB and can't get into windows with less then 1.52, I got as close as the windows logo and scroll thing at the begining at 1.5 but then it crashed.

AI Overclock tuner: Manual
CPU Ratio Setting: 6
FSB Strap to North Bridge: 400
FSB Frequency: 550
PCI-E Frequency: 100
DRAM Frequency: 1100
DRAM CLK Skew on Channel A1: AUTO
DRAM CLK Skew on Channel A2: AUTO
DRAM CLK Skew on Channel B1: AUTO
DRAM CLK Skew on Channel B2: AUTO
DRAM Timing Control: Manual

1st Information :

CAS# Latency: 5
DRAM RAS# to CAS# Delay:5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge:15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: AUTO
Write Recovery Time: AUTO
Read to Precharge Time: AUTO

2nd Information :

READ to WRITE Delay (S/D): AUTO
Write to Read Delay (S): AUTO
WRITE to READ Delay (D): AUTO
READ to READ Delay (S): AUTO
READ to READ Delay (D): AUTO
WRITE to WRITE Delay (S): AUTO
WRITE to WRITE Delay (D): AUTO

3rd Information :

WRITE to PRE Delay: AUTO
READ to PRE Delay: AUTO
PRE to PRE Delay: AUTO
ALL PRE to ACT Delay: AUTO
ALL PRE to REF Delay: AUTO
DRAM Static Read Control: AUTO
DRAM Read Training: AUTO
MEM. OC Charger: AUTO
AI Clock Twister: AUTO
AI Transaction Booster: AUTO

4th Information :

CPU Voltage: 1.325
CPU GTL Voltage Reference (0/2): AUTO\also tried .630
CPU GTL Voltage Reference (1/3): AUTO\also tried .670
CPU PLL Voltage: 1.54 works best so far\also tried 1.56 and 1.58
FSB Termination Voltage: 1.26 don't really know what this does, seems to work best on auto.
DRAM Voltage: 2.10
NB Voltage: 1.52 boots me into windows then crashes, memory error. Will boot with less but not into windows.
NB GTL Reference: AUTO\also tried .630
SBridge Voltage: auto
PCIE SATA Voltage: auto

Load Line Calibration: disabled
CPU Spread Spectrum: disabled
PCIE Spread Spectrum: disabled
CPU Clock Skew : Auto
NB Clock Skew : Auto
CPU Margin Enhancement: Performance Level

[gergregg]

Ok here are my settings as seen in the bios. I can't even boot up without less then 1.42 NB and can't get into windows with less then 1.52, I got as close as the windows logo and scroll thing at the begining at 1.5 but then it crashed.

AI Overclock tuner: Manual
CPU Ratio Setting: 6
FSB Strap to North Bridge: 400 (Have you tried 333)
FSB Frequency: 550
PCI-E Frequency: 100
DRAM Frequency: 1100
DRAM CLK Skew on Channel A1: AUTO
DRAM CLK Skew on Channel A2: AUTO
DRAM CLK Skew on Channel B1: AUTO
DRAM CLK Skew on Channel B2: AUTO
DRAM Timing Control: Manual

1st Information :

CAS# Latency: 5
DRAM RAS# to CAS# Delay:5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge:15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: AUTO
Write Recovery Time: AUTO
Read to Precharge Time: AUTO

2nd Information :

READ to WRITE Delay (S/D): AUTO
Write to Read Delay (S): AUTO
WRITE to READ Delay (D): AUTO
READ to READ Delay (S): AUTO
READ to READ Delay (D): AUTO
WRITE to WRITE Delay (S): AUTO
WRITE to WRITE Delay (D): AUTO

3rd Information :

WRITE to PRE Delay: AUTO
READ to PRE Delay: AUTO
PRE to PRE Delay: AUTO
ALL PRE to ACT Delay: AUTO
ALL PRE to REF Delay: AUTO
DRAM Static Read Control: AUTO
DRAM Read Training: AUTO
MEM. OC Charger: AUTO
AI Clock Twister: AUTO
AI Transaction Booster: AUTO (manual set to 10 all pull-ins disabled)

4th Information :

CPU Voltage: 1.325
CPU GTL Voltage Reference (0/2): AUTO\also tried .630
CPU GTL Voltage Reference (1/3): AUTO\also tried .670
CPU PLL Voltage: 1.54 works best so far\also tried 1.56 and 1.58
FSB Termination Voltage: 1.26 don't really know what this does, seems to work best on auto.
DRAM Voltage: 2.10
NB Voltage: 1.52 boots me into windows then crashes, memory error. Will boot with less but not into windows.
NB GTL Reference: AUTO\also tried .630
SBridge Voltage: auto
PCIE SATA Voltage: auto

Load Line Calibration: disabled
CPU Spread Spectrum: disabled
PCIE Spread Spectrum: disabled
CPU Clock Skew : Auto
NB Clock Skew : Auto
CPU Margin Enhancement: Performance Level (try other settings)

See if those will make a difference.

[vrdublu]

Ok I tried those settings as well and still nothing, getting errors using Vistas mem check. I did try something else though and found interesting results. I went back to my old settings I used with an E6320 which I had hummin along @ 3.22 Ghz till recently, I used exactly the same MB settings and just changed the Cpu Voltage and NB V which btw is now at 1.26 at 458 fsb, so there's something else causing me to fail at 550?? I don't know if this helps, my MB Rev is 1.03G and bios currently used is 1702, I can't remeber if it's the modded one any more. I would really like to get the higher fsb, but these settings seem to be working ok right now. If anyone has any more suggestions on how I can get a higher fsb I would greatly appreciate it, my ram can't do much more then 1100 mhz though.

AI Overclock tuner: Manual
CPU Ratio Setting: 9.5
FSB Strap to North Bridge: 400
FSB Frequency: 458
PCI-E Frequency: 100
DRAM Frequency: 1100
DRAM CLK Skew on Channel A1: AUTO
DRAM CLK Skew on Channel A2: AUTO
DRAM CLK Skew on Channel B1: AUTO
DRAM CLK Skew on Channel B2: AUTO
DRAM Timing Control: Manual

1st Information :

CAS# Latency: 5
DRAM RAS# to CAS# Delay:5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge:15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: AUTO
Write Recovery Time: AUTO
Read to Precharge Time: AUTO

2nd Information :

READ to WRITE Delay (S/D): AUTO
Write to Read Delay (S): AUTO
WRITE to READ Delay (D): AUTO
READ to READ Delay (S): AUTO
READ to READ Delay (D): AUTO
WRITE to WRITE Delay (S): AUTO
WRITE to WRITE Delay (D): AUTO

3rd Information :

WRITE to PRE Delay: AUTO
READ to PRE Delay: AUTO
PRE to PRE Delay: AUTO
ALL PRE to ACT Delay: AUTO
ALL PRE to REF Delay: AUTO
DRAM Static Read Control: AUTO
DRAM Read Training: AUTO
MEM. OC Charger: AUTO
AI Clock Twister: AUTO
AI Transaction Booster: Manual

Performance Level : 8
Everything Disabled
4th Information :

CPU Voltage: 1.33125
CPU GTL Voltage Reference (0/2): .630
CPU GTL Voltage Reference (1/3): .670
CPU PLL Voltage: 1.54
FSB Termination Voltage: auto
DRAM Voltage: 2.10
NB Voltage: 1.26
NB GTL Reference: AUTO
SBridge Voltage: auto
PCIE SATA Voltage: auto

Load Line Calibration: Enabled : Seemed to really help lower voltages and stabilize things in windows. Had to run over 1.375 in bios with this off because of V droop.
CPU Spread Spectrum: disabled
PCIE Spread Spectrum: disabled
CPU Clock Skew : Auto
NB Clock Skew : Auto
CPU Margin Enhancement: Performance Level

[PakaPaka]

here are my results on my DFI P45-T2RS PLUS 10/03/08, E8400 CO With TRUE120, G.Skill 4GB Pi 800MHZ


lol i just give him Vcore and i don't care if its too much

and 24/7 with ASUS P5Q Pro 1406 on 1.336V (for IBT )

and pass 5 hours OCCT on 1.328V.

i see that you are post some bios setting, i can give my too if somebody want.

[WaterFlex]

PakaPaka
Good job with old C0

[PakaPaka]

tanks.
but the CO stepping is old? the EO stepping is old (?)

[Leeghoofd]

CO is the older stepping, overal EO clocks better with lower volts... I hope 1406 bios will give better results mate... I did 500FSB out of the box with an E7400 with the 1406 bios

[PakaPaka]

oh ok i remember it wrong.

yes, i hope so too
tank you for all your help.

[daos]

Wow, you guys are doing some amazing things with these 84/8500 CPUs. I have the C0 8500 and I can barely hit 4Ghz at default voltage on air using the 790Ultra chipset. No matter how many volts I throw at the CPU, I cannot get it stable past 4Ghz. I have the Corsair 1800Mhz DDR3 too so I do not know what my problems are.

[vrdublu]

here are my results on my DFI P45-T2RS PLUS 10/03/08, E8400 CO With TRUE120, G.Skill 4GB Pi 800MHZ


lol i just give him Vcore and i don't care if its too much

and 24/7 with ASUS P5Q Pro 1406 on 1.336V (for IBT )

and pass 5 hours OCCT on 1.328V.

i see that you are post some bios setting, i can give my too if somebody want.

Wow that certainly is alot of proof that you got her up to 4 Ghz, bios settings will certainly help, thx.

[jcniest5]

Well, I got myself an E8400 E0 Q842A247 from my local Micro Center. A search on it turns up nothing. Not sure if this is a good OCing batch or not.

[PakaPaka]

Wow that certainly is alot of proof that you got her up to 4 Ghz, bios settings will certainly help, thx.

for the 4613mhz i don't have the settings, but for the 4054mhz stable 24/7 i do.
those are the setting:

Ai Overclock Tuner : Manual
CPU Ratio Setting : 9
FSB Frequency : 450
PCIE Frequency: 100
FSB Strap to North Bridge : Auto
DRAM Frequency: 901MHZ
DRAM Timing Control: 5-5-5-15
DRAM Static Read Control: Disabled
Dram Read Training : Disabled
MEM OC Charger : Disabled
Ai Clock Twister : Auto
Ai Transaction Booster : Auto
CPU Voltage : 1.3500V in bios, 1.366V at load, 1.328V at idle.
CPU GTL Reference: Auto
CPU PLL Voltage : 1.52
FSB Termination Voltage: 1.26
DRAM Voltage : 2.10
NB Voltage : Auto
PCIE Sata Voltage: Auto
Load Line Calabration : Enabled
CPU Sread Spectrum : Disabled
PCIE Spread Spectrum : Disabled
CPU Clock Skew: Auto

its for IBT 5 run 100% stable, at OCCT pass 5 hours with Vcore 1.328V at load.

[vrdublu]

for the 4613mhz i don't have the settings, but for the 4054mhz stable 24/7 i do.
those are the setting:

Ai Overclock Tuner : Manual
CPU Ratio Setting : 9
FSB Frequency : 450
PCIE Frequency: 100
FSB Strap to North Bridge : Auto
DRAM Frequency: 901MHZ
DRAM Timing Control: 5-5-5-15
DRAM Static Read Control: Disabled
Dram Read Training : Disabled
MEM OC Charger : Disabled
Ai Clock Twister : Auto
Ai Transaction Booster : Auto
CPU Voltage : 1.3500V in bios, 1.366V at load, 1.328V at idle.
CPU GTL Reference: Auto
CPU PLL Voltage : 1.52
FSB Termination Voltage: 1.26
DRAM Voltage : 2.10
NB Voltage : Auto
PCIE Sata Voltage: Auto
Load Line Calabration : Enabled
CPU Sread Spectrum : Disabled
PCIE Spread Spectrum : Disabled
CPU Clock Skew: Auto

its for IBT 5 run 100% stable, at OCCT pass 5 hours with Vcore 1.328V at load.

Thx that's pretty good OC I think. My E8500 is very close to that @ 4.34 with 1.3125V bios and 1.304 in Windows. All other settings are almost identical as yours. What sort of Temps are you getting ?? I'm on water and apparently I hit 54 C, not likely but that what core temp says. Have you tried a higher fsb ??? I could really use some settings for that if you have those available. If anyone else has some useful information please suggest away.

[PakaPaka]

your E8500 at 4.34GHZ with 1.304 is stable? which mobo?
my temps on 1.336V 4.05GHZ are at load 52 max and with IBT its 66 max at load.

any chance to get 4.5GHZ on air with P5Q Pro on safety Vcore&NB?

[R31Nismoid]

Don't keep torturing these chips. Listen to Lee. He keeps telling you guys not to keep torturing these chips like this. Run IBT a couple of times, then just run Orthos Blend/Memtest, and just *use* the computer and enjoy it.

Running these stress tests (that stress the CPU far more than anything else) repeatedly, especially IBT and sometimes prime small fft on hours/days on end, is not really healthy for these chips when they're pushed too hard. Your chip might be degrading from it. Seen it happen plenty enough. One guy degraded from 3.6 to 3.4 ghz (needed higher vcore--1.34 vs 1.32v) for 3.6 after a few weeks of repeated IBT's. And 1.32v isn't even that high.

Yes it's possible for chips to degrade even at lower voltages.
All chips respond differently, so what may happen to 1 person might not happen to someone else. Board timings/settings may play a part too.

There have been cases where it was the northbridge going south, or RAM, but memtest would pick that up (you'd probably need something a bit tougher on the NB to pick up problems there, like Orthos/prime Blend).

Thats exactly what i did though...

Ran IBT for a solid 45mins/1hr and temps were a champ, stable as.
Also did memtest initially etc etc.
And a prime blend overnight etc.

I didn't run a stress test after that. It was only on the stupid hot day here it crashed, and since then not quite the same
And i game on it daily without issue

Im still yet to see if its the ram or the chip, no time to test yet though.
It was fine for what 2 months maybe 3 without problemos and my temps are very low too.
Will do digging tonight perhaps

[vrdublu]

your E8500 at 4.34GHZ with 1.304 is stable? which mobo?
my temps on 1.336V 4.05GHZ are at load 52 max and with IBT its 66 max at load.

any chance to get 4.5GHZ on air with P5Q Pro on safety Vcore&NB?

Yes completely stable on the P5Q Deluxe, at the settings I mentioned earlier. I would like a higher FSB though. Need to start testing again soon. I would like something in the 550fsb area with a clock of 4950 @ 1.45 or so, we'll see how she goes.

[R31Nismoid]

ok so tested the ram over the last 3-4hrs... seems thats not it!
Held the ground fine.

So this time back to near the old settings, slightly lower FSB (470 for now) and will see how it goes
Could just be i need another notch of vcore perhaps for 4.3, so sitting on 1.296 vcore with a lower clock for now

[jcniest5]

Stupid E8400 again, even E0. Just bought it yesterday and one of the temp sensors is stuck at 39, it goes up a little if I torture it, but otherwise, it's always at 39. Dam...I am beginning to hate E8400! Why do I even want it anyway...?

[PakaPaka]

Stupid E8400 again, even E0. Just bought it yesterday and one of the temp sensors is stuck at 39, it goes up a little if I torture it, but otherwise, it's always at 39. Dam...I am beginning to hate E8400! Why do I even want it anyway...?

because he is good clocker?

my sensors are stuck too, if you pass the 50C~ the sensors going to be normal.

[jcniest5]

because he is good clocker?

my sensors are stuck too, if you pass the 50C~ the sensors going to be normal.

No, they never go past 47 even many hours of intense torturing. When tortures, the other non-stuck sensor rises to 39 and then both would go up together. When they cool down, the stuck sensor comes back to stay at 39 while the other one goes down all the way to 32. I haven't tried OCing the CPU yet. I should to see how well (or bad) it OCs. We shall see.