**Official e8400/e8500 Retail OC Thread

[Godmyster]

I have the voltages in bios in auto the only one that i boosted is the vcore to 1.36v but thats not the problem is it? or do i have to boost some of the others? wanted some help with anyone that has an identical system.. at least a p5q deluxe and a e8400 e0

[LennyRhys]

When I got an error before 10 seconds it was because my memory was unstable, but your memory at 445MHz CL5 shouldn't be causing the instability...perhaps you have a bad stick of memory, in which case you should run memtest just to be sure.

Also, try not to use auto voltage when overclocking; BIOS doesn't have a clue what the optimum voltage is for any particular component so it just gives a blanket amount, and that's not going to help things. What voltage options does your BIOS give, and can you post your current settings?

[Godmyster]

Im happy to say i got this stable at 445fsb... here is a pic..



These are my settings..

Ai Overclock Tuner ................. [Manual]
CPU Ratio Setting .................. [9]
FSB Frequency ...................... [445]
PCIE Frequency ..................... [100]
FSB Strap to North Bridge .......... [Auto]
DRAM Frequency ..................... [890]
DRAM Clock Skew on Channel A1 ...... [Auto]
DRAM Clock Skew on Channel A2 ...... [Auto]
DRAM Clock Skew on Channel B1 ...... [Auto]
DRAM Clock Skew on Channel B2 ...... [Auto]


DRAM Timing Control: Manual
1st
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : Auto
Row Refresh Cycle Time : Auto
Write Recovery Time : Auto
Read to Precharge Time : Auto

2nd
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
Write to Pre Delay : Auto
Reado 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 ........... [Disabled]
DRAM Read Training ................. [Disabled]
MEM. OC Charger .................... [Auto]
Ai Clock Twister ................... [Auto]
Ai Transaction Booster ............. [Auto]
____________________________________

CPU Voltage ........................ [1.36]
CPU GTL Voltage Reference (0/2) .... [Auto]
CPU GTL Voltage Reference (1/3) .... [Auto]
CPU PLL Voltage .................... [1.54]
FSB Termination Voltage............. [1.26]
DRAM Voltage ....................... [1.9]
NB Voltage ......................... [1.26]
NB GTL Reference ................... [Auto]
SB Voltage ......................... [Auto]
PCIE SATA Voltage .................. [Auto]
____________________________________

Load-Line Calibration .............. [Enable]
CPU Spread Spectrum ................ [Disabled]
PCIE Spread Spectrum ............... [Disabled]
CPU Clock Skew ..................... [Auto]
NB Clock Skew ...................... [Auto]
CPU Margin Enhancement ............. [Performance Mode]

What do you think?

[PolRoger]

Im happy to say i got this stable at 445fsb... here is a pic..



These are my settings..

Ai Overclock Tuner ................. [Manual]
CPU Ratio Setting .................. [9]
FSB Frequency ...................... [445]
PCIE Frequency ..................... [100]
FSB Strap to North Bridge .......... [Auto]
DRAM Frequency ..................... [890]
DRAM Clock Skew on Channel A1 ...... [Auto]
DRAM Clock Skew on Channel A2 ...... [Auto]
DRAM Clock Skew on Channel B1 ...... [Auto]
DRAM Clock Skew on Channel B2 ...... [Auto]


DRAM Timing Control: Manual
1st
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : Auto
Row Refresh Cycle Time : Auto
Write Recovery Time : Auto
Read to Precharge Time : Auto

2nd
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
Write to Pre Delay : Auto
Reado 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 ........... [Disabled]
DRAM Read Training ................. [Disabled]
MEM. OC Charger .................... [Auto]
Ai Clock Twister ................... [Auto]
Ai Transaction Booster ............. [Auto]
____________________________________

CPU Voltage ........................ [1.36]
CPU GTL Voltage Reference (0/2) .... [Auto]
CPU GTL Voltage Reference (1/3) .... [Auto]
CPU PLL Voltage .................... [1.54]
FSB Termination Voltage............. [1.26]
DRAM Voltage ....................... [1.9]
NB Voltage ......................... [1.26]
NB GTL Reference ................... [Auto]
SB Voltage ......................... [Auto]
PCIE SATA Voltage .................. [Auto]
____________________________________

Load-Line Calibration .............. [Enable]
CPU Spread Spectrum ................ [Disabled]
PCIE Spread Spectrum ............... [Disabled]
CPU Clock Skew ..................... [Auto]
NB Clock Skew ...................... [Auto]
CPU Margin Enhancement ............. [Performance Mode]

What do you think?

Good start. Now that you have it stable try to see if you can lower the vcore but keep everthing else the same. Some E0 chips can run the same O.C. with less cpu voltage. 1.325v/1.300v/1.275v/1.250v

[WaterFlex]

Your setting are ok. But you must decrease vCore. Even my E8400 E0 is stable in Linpack at 1,17 volts.

[LennyRhys]

There would be no gain in changing vcore now because 4.2GHz is the target. keep increasing the FSB and trying to get it stable. You have 445 stable, so try 456 next (for 4.1GHz) without changing any other frequencies. If I were you I'd increase FSB termination voltage, NB voltage and it won't hurt to raise vdimm to 2.0v, and you should stabilize the higher FSB. Once stable then you can start tweaking to get voltages down.

I always find that rationing voltages on the way "up" significantly adds to the time taken to get a stable OC; I usually go right up with a fair bit of voltage, nothing extreme, and work my way down.

[Godmyster]

I had to restart my computer for another thing, so i did another run with the same settings as i posted but i got this when i woke up..

[gurusan]

Try this:

Ai Overclock Tuner ................. [Manual]
CPU Ratio Setting .................. [9]
FSB Frequency ...................... [445]
PCIE Frequency ..................... [101]
FSB Strap to North Bridge .......... [Auto]
DRAM Frequency ..................... [890]
DRAM Clock Skew on Channel A1 ...... [Auto]
DRAM Clock Skew on Channel A2 ...... [Auto]
DRAM Clock Skew on Channel B1 ...... [Auto]
DRAM Clock Skew on Channel B2 ...... [Auto]


DRAM Timing Control: Manual
1st
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : Auto
Row Refresh Cycle Time : Auto
Write Recovery Time : Auto
Read to Precharge Time : Auto

2nd
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
Write to Pre Delay : Auto
Reado 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 ........... [Disabled]
DRAM Read Training ................. [Disabled]
MEM. OC Charger .................... [ENABLED]
Ai Clock Twister ................... [Auto]
Ai Transaction Booster ............. [Auto]
____________________________________

CPU Voltage ........................ [1.30]
CPU GTL Voltage Reference (0/2) .... [Auto]
CPU GTL Voltage Reference (1/3) .... [Auto]
CPU PLL Voltage .................... [1.52]
FSB Termination Voltage............. [1.22]
DRAM Voltage ....................... [1.92]
NB Voltage ......................... [1.24]
NB GTL Reference ................... [.63]
SB Voltage ......................... [Auto]
PCIE SATA Voltage .................. [Auto]
____________________________________

Load-Line Calibration .............. [Enable]
CPU Spread Spectrum ................ [Disabled]
PCIE Spread Spectrum ............... [Disabled]
CPU Clock Skew ..................... [Auto]
NB Clock Skew ...................... [Auto]
CPU Margin Enhancement ............. [OPTIMIZED]

[Godmyster]

so basicly your saying i should lower the voltages???

[[XC] 4X4N]

Had a little time to try and get some more out of this chip. Been folding for over a week at 4.3, running a few quick tests at 4.4. Pay no attention to the pi times, no optimizations and lots of other stuff running. Have had occt running for over 1/2 hour. So far so good

Temps are low from this being in my garage and it's about 55F ambient right now

[unclewebb]

My well used E8400 C0 needs very close to 1.40 volts to be stable at 4 GHz but most E0 chips can run 4 GHz with less voltage.

It might be your memory holding you back. I'd drop the multiplier down to 8 and test again and make sure that your memory can run this speed reliably at that memory voltage. I tend to like 2.00 to 2.10 volts for DDR2 but every stick is different.

[Godmyster]

What bios should i use first of all?

[radaja]

well heres where im at now.

[Godmyster]

My well used E8400 C0 needs very close to 1.40 volts to be stable at 4 GHz but most E0 chips can run 4 GHz with less voltage.

It might be your memory holding you back. I'd drop the multiplier down to 8 and test again and make sure that your memory can run this speed reliably at that memory voltage. I tend to like 2.00 to 2.10 volts for DDR2 but every stick is different.

I did what you asked but before that i changed my bios from the 1611m to the Asus 1702 and put all the settings i had before and this is what i got



it passed intelburntest dunno if thats stable or not but just to make sure im runing Orthos with these settings...

[[XC] 4X4N]

Passed occt at the settings above, but failed linpack. Upped vcore and vtt a bit, seems good now. No more time for today. I will let it crunch/fold at this for a few days.

[Sepander]

Passed ibt over 8 min + memtest. Good enough for me.

[Godmyster]

hey guys, i ran linpack as you can see and passed so i left Orthos running during the nights and got this..



what do you guys think?

[LennyRhys]

Hmm passes IBT but fails Orthos blend...that's gotta be a first I dunno man, temps? Where is Core Temp/Real Temp if you're running almost 10 hours of Orthos?

[Godmyster]

it ran for like 9hours as you can see and i still have realtemp on went up to a max of 56º seems pretty good i think...

[LennyRhys]

Yes temps are fine. I don't know why Orthos has decided to fail after 9 hours but to be honest I'd just keep your system as it is. Nothing you do from day-to-day will stress it like that, or at least it's very unlikely.

[Blue Storm]

hello...I want to ask you, how much is overclocking potential on E8400 with batch number Q818A210, it is revision C0...thanks

[LennyRhys]

It's impossible to base overclocking potential on batch number alone - every batch has good and bad chips; some batches have more good than bad chips and they are misleadingly called "good" batches. Most E8400s do 4GHz quite easily, however the C0 chips tend to get a lot hotter than the E0 chips.

[Godmyster]

i wanted to go over 4.0 though, as you can see the memories can go at least 500 i havent tried more, what can i do to go up to 4.2 then?

[LennyRhys]

4200/9 = 467, so that should be the speed of your FSB and memory for 4.2GHz. You will need more CPU volts but since you already have 500FSB stable you shouldn't need to change much else.

[Godmyster]

These are my settings at the moment...

Ai Overclock Tuner ................. [Manual]
CPU Ratio Setting .................. [9]
FSB Frequency ...................... [466]
PCIE Frequency ..................... [100]
FSB Strap to North Bridge .......... [Auto]
DRAM Frequency ..................... [933]
DRAM Clock Skew on Channel A1 ...... [Auto]
DRAM Clock Skew on Channel A2 ...... [Auto]
DRAM Clock Skew on Channel B1 ...... [Auto]
DRAM Clock Skew on Channel B2 ...... [Auto]


DRAM Timing Control: Manual
1st
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : Auto
Row Refresh Cycle Time : Auto
Write Recovery Time : Auto
Read to Precharge Time : Auto

2nd
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
Write to Pre Delay : Auto
Reado 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 ........... [Disabled]
DRAM Read Training ................. [Disabled]
MEM. OC Charger .................... [Enable]
Ai Clock Twister ................... [Auto]
Ai Transaction Booster ............. [Auto]
____________________________________

CPU Voltage ........................ [1.35]
CPU GTL Voltage Reference (0/2) .... [Auto]
CPU GTL Voltage Reference (1/3) .... [Auto]
CPU PLL Voltage .................... [1.54]
FSB Termination Voltage............. [1.30]
DRAM Voltage ....................... [1.98]
NB Voltage ......................... [1.26]
NB GTL Reference ................... [Auto]
SB Voltage ......................... [Auto]
PCIE SATA Voltage .................. [Auto]
____________________________________

Load-Line Calibration .............. [Enable]
CPU Spread Spectrum ................ [Disabled]
PCIE Spread Spectrum ............... [Disabled]
CPU Clock Skew ..................... [normal]
NB Clock Skew ...................... [normal]
CPU Margin Enhancement ............. [optimal Mode]

What do you think Lenny?