**Official e8400/e8500 Retail OC Thread

[kpo6969]

First post here, great Forum
Temp and voltage info
Hope this helps some and I could use some also
1st time o'cr, 1st build ever, up for a week. I have it at 3.6ghz
Only real bios change besides the usual, cpu voltage
1.25625 bios setting
1.236 read in bios
core temp and everest TjMax changed to 95c
E8400 (purchased from Newegg)
B#808A169 pack date 4/08/08

[TheInternet1980]

User Name: TheInternet1980
Stability 5 hours of Prime95 Small FFT.

CPU: Xeon E3110
OC: 4005mhz
Stepping: C0
Week: Q807
Code: A091
Vcore: 1.248v

Cooling: Air
Cooler brand/model: Scythe Ninja Rev. B

Motherboard: DFI DK P35-T2RS
Bios Version: DK35D311
Operating System: Vista x64

RAM brand: GSkill
RAM rated speed: 800mhz
RAM actual speed: 1068mhz
Latency: 5-5-5-15

[Jupiler]

Did a quick check on my E8200

Readings :

BIOS : 1.18V
CPU-Z : 1.188V
Coretemp 0.98.1 : 1.0750V
Realtemp 2.5 : 1.1875V

Hope it helps.

Could users with the new 45nm chips try using CPU-Z to report VID and compare that to what CoreTemp is saying?

If you go into the INI file for CPU-Z just set Sensor to OFF:

Sensor=OFF

and instead of it reporting your actual voltage it will display the VID of your chip.



I'm a little biased here as well. I just released RealTemp 2.5 which also displays VID and I'm interested in finding out which program is right. I think Intel and CPU-Z have a pretty close relationship and I tend to trust CPU-Z. I think CoreTemp might be reporting VID too low on the new 45nm chips.

[gundamit]

First post here, great Forum
Temp and voltage info
Hope this helps some and I could use some also
1st time o'cr, 1st build ever, up for a week. I have it at 3.6ghz
Only real bios change besides the usual, cpu voltage
1.25625 bios setting
1.236 read in bios
core temp and everest TjMax changed to 95c
E8400 (purchased from Newegg)
B#808A169 pack date 4/08/08

Welcome aboard. I was hoping to see more results from the Newegg e8400s since they have had an uninterrupted supply and okay price for almost 2 weeks now. Keep pushing up the FSB and show us some stability tests.

[kpo6969]

I need guidence so I don't fry my cpu:
for 4.05Ghz
fsb?
vcore?
do I add voltage to fsb, mch?
my ram is NQ rated 1.8-2.0v
Thanks

[railmeat]

Hey everyone, I'm originally from ocforums.com so don't hate too much

Anyways, I'm having a problem getting my retail E8400 prime stable @ 4.5GHz. Heres my original thread on ocforums, http://www.ocforums.com/showthread.php?t=544212

My current setup consists of a lapped E8400 (batch Q746A381), a lapped Thermalright Ultra 120 Extreme, 4GB of G-Skill DDR2-8000, Abit IP35-E (BIOS 14) and a Corsair HX620 PSU.

Basically is that the best BIOS for overclocking Wolfdales with? I have my NB @ 1.41 volts, SB @ 1.6, CPU VTT @ 1.23, and vcore @ 1.58actual after vdroop (according to CPU-Z). That voltage seems kinda high for only 4.5GHz, so I'm wondering if theres some other voltage I'm not increasing enough. I haven't seen many (or any at all) Wolfdale results on the IP35-E, so I don't exactly know what I'm shooting for. I know my RAM is capable of running 530MHz FSB, and I took my board that high on my old E6300.

"Anyways, I'm having a problem getting my retail E8400 prime stable @ 4.5
GHz."

dude be happy with that,sometimes u just gotta laff

[gundamit]

I need guidence so I don't fry my cpu:
for 4.05Ghz
fsb?
vcore?
do I add voltage to fsb, mch?
my ram is NQ rated 1.8-2.0v
Thanks

Have you read through this thread? Only 98 pages to plow through ... You should be able to determine if the memory (dividers or lack thereof) will hold you back and if there is a 4x1GB penalty to be paid. But I believe most of the Gigabyte mobos will have plenty of FSB to get you there with the 9 multi. Seems doubtful your heatsink will be able to handle the heat at load at 4ghz, although you never can tell. If you're worried about the CPU just try to keep it @1.4v or less.

[makaka]

That's great Makaka what batch/fpo?

Q751A processor.

[nikk]

Could users with the new 45nm chips try using CPU-Z to report VID and compare that to what CoreTemp is saying?

If you go into the INI file for CPU-Z just set Sensor to OFF:

Sensor=OFF

and instead of it reporting your actual voltage it will display the VID of your chip.

haven't tried realtemp

[unclewebb]

haven't tried realtemp

Thanks. CPU-Z seems to be showing 1.225 for quite a few of the 45nm dual core chips.

[Hughyhunter]

BATCH Q746A487 still running strong @ 3.6ghz or 1600mhz FSB with only 1.225v in bios and 1.20v cpu-z. Had this sucker almost 3 months now.

[Vixx]

I need guidence so I don't fry my cpu:
for 4.05Ghz
fsb?
vcore?
do I add voltage to fsb, mch?
my ram is NQ rated 1.8-2.0v
Thanks

4.05 GHz is set as my "failsafe" setting. Whenever I hit a wall and need to go back to a safe config, these are what I use:

(Q745A567, Pack date 1/4/2008)

Multiplier: 9
FSB: 450
PCIE Freq: 110
CPU Voltage: 1.232v (actual)
CPU PLL Voltage: 1.5v
NB Voltage: 1.25v
DRAM Voltage: 2.14v (PC8500 @ 2.2v)
SB Voltage: 1.050v

Everything else is set to auto, then I tweak things from there.

**********************************************
**********************************************

For 4.2 GHz all my settings remain the same, except that I have to increase my FSB to 467 and bump my VCORE up to 1.272v (actual)

[Leeghoofd]

He will prolly need abit more than 1.23 volts for 4ghz as he already needs 1.22 for 3.6Ghz to be stable... prolly be around 1.35

Nice CPU Vixx

[ToyTen]

I have a e8400 and i'm glad for what I get, the thing is that it needs lots of Vcore to be very very happy. Maybe will it appreciate subzero temperatures??... I will see when my autocascade gets repared.

How voltages have to be increased for my chip to run stable@3000, 3500, 3750 & 4000Mhz (fsb@500)
Small fft test (minmum 1h)
strap333
ratio ram-fsb 2.00B(500mhz)cas7 vddr@stock
vcore bios 1.2000v
vfsb / vmch / vpci-e@stock
GTLRef1 +3% / GTLRef2 -3%
loadline calibration on:


vcore bios 1.2435v
vfsb +0.2
vmch +0.225
vpci-e +0.2
GTLRef1 +3% / GTLRef2 -3%
loadline calibration on:


Only the vcore had to be changed to (bios) 1.3200v for this test:

Blend test 4h10
strap333
Ratio ram-fsb 3.20B(800mhz)cas7 vddr +0.55
1.41875 vcore bios
vfsb +0.20
vmch +0.275
vpcie +0.20
GTLRef1 +3% / GTLRef2 -3%
loadline calibration on: Here we do see the vcore drop: -0.026v from bios to load witch isn't that bad I think (?)

finish line

currently running with bios f7b.

[advapi]

hello to everybody, anyone knows if Q801A is a good batch for E8500? I've received it today, still have got not time to OC it.
Thanks

[sativasam]

Just upgraded from amd socket939, likin my new e8400, currently stable @ 480fsb with synced ram, over 490fsb wont pass orthos blend for any length of time. Though i can boot vista 64 @ 501fsb which is promising for a relatively cheap mobo.

Currently set my nb an sb to 1.52v and ht is 1.46v, cpu z is reporting vcore @ 1.15-1.17v when set to 1.2v bios. Havent tried pushing more than 3.6ghz as my core temps hit 59c in asus pcprobe yet 49c in coretemp orthos loaded, my cheapo cooler isnt up to more than 3.6ghz it seems, cant find a TRUE 120 cooler in stock in the uk @ mo so just testin max fsb for now.

Do any of the above settings seem excessive for the 650-750 chipset?

advice appreciated, thx in advance

[sativasam]

oopps nearly dble posted, tryin realtemp, 22c idle and 39c reported orthos loaded @ 3.6ghz, not a groundbreaking overclock just strange that pcprobe shows 59c or so load. screenies to follow soon.

[kpo6969]

He will prolly need abit more than 1.23 volts for 4ghz as he already needs 1.22 for 3.6Ghz to be stable... prolly be around 1.35

Nice CPU Vixx

Could it be that my psu isn't up to snuff? I have my suspicions.
It's an Antec Earthwatts EA500D that came with my case.
The Seasonic version was 17a + 17a = 34amps on the 12v
But I read that they changed oem's to Delta and it now says it's 22a + 22a
I was thinking of this to upgrade to:
Corsair HX 520
That should be enough for me (I hope) 40a?
I don't trust unknown entities.

[Twista]

i need 1.37v in order to get 4.0ghz stable on my evga i650 =[ anything lower than 1.37 locks up games and causes orthos asap.

[TheGoat Eater]

+

+

=

[MrRevhead]

Anyone with or know of any Q807A414 results? If so, please submit.

I have a CPU with the above FPO/Batch lined up (only Q807A I can find atm here in Aus) and would like to see other's experiences prior to purchasing. My Q745A740 is sub-standard for a Q745A chip and don't want to really fall into the same trap again.

[mrcape]

nice pics + chip goat eater.

[m4gg0t]

was going to post this early. i've been following this thread about the E8400/E8500 overclocking. i have my E8400 currently overclocked @ 4.23GHz 470x9 1880FSB 1.384vCore. my rig is in sig.

[Twista]

sad, i need all these volts for a stable 4ghz =[ I see all these people in here with my overclock @ like 1.29 volts lol..

[Jupiler]

When i remove the cooler i will post the exact batch number

Any update on the full batch code?