[HDCHOPPER]

ya TJ MAX is the only constant...

and on my E8400 fun this weekend playing with 2 different batches of E8400's batch #814 (4.0 at 1.22~1.30volts) is much better than batch#817 (3.8 at1.365~ dont wanna up it any more volts) wasted 12 hours on that 817 and never got it stable past 3.8!! & took 15 minutes to get the 814 to 4.0 at 1.22 volts

[harlam357]

You'll really like that E8400 over your old Pentium D HD... especially when it comes to these new WUs were Folding.

[kronnyq]

Question....is there any way to identify e8400 batch number without looking at the CPU, I really don't feel like yoinkin my heatsink off. I need to compare mine to others of the same batch and figure out why I can't do more than 3.8Ghz w/ 1.4vcore

[Supershanks]

if it's reatil it's on the box Bottom Left FPO#

[kronnyq]

Ah, well that settles it then. I got Batch #Q801A290, which apparently is the sucks! Saw in another thread someone had to set it to 1.435 Bios to achieve 4Ghz. As much as I like overclocking, I do not see any benefit running the chip at this voltage as it will idle at 1.41Vcore. I really don't think I would see any real world performance gain from +200Mhz....and I bet the chip will have a longer life @ 1.4V Bios 1.36 idle. 4ghz would be nice to show off but I just gotta deal with the fact that I got a crappy batch And for christ sakes this batch VID is 1.25V

Also the only person in this thread that has this batch

CPU: E8400
ES/Retail: Retail
Batch #: Q801A290
Ship/Packaging Date: 3/27/08
Voltage(s) (Stock/OC'ed): 1.25V / 1.4V
Frequency(ies) (OC'ed): 3.825 GHz 425x9 (24/7)
Motherboard: Gigabyte P35-DS3l
BIOS: F8f
-----
*Extra* Memory(ies) (Timing(s)): OCZ Platinum DDR2-1000 5-5-5-18
*Extra* Memory(ies) (Voltage(s)): 2.1V
*Extra* Third Party Cooling Solution: Arctic 7 Freezer Pro
*Extra* Paste(s)/Compound(s)/Other(s): Arctic Silver 2

Additional Comment(s):
Completely stable for past 2 weeks after reducing NB voltage from +.2V to +.1V. Speedfan idle temps 38C-40C. Prime95 full load temps 50C-52C, peaked out around 60C when air conditioner is off and room temp around 75-80F.

Sure would be nice to be able to know the Batch # before buying this chip, but hey wat can ya do

[tester3000]

CPU: e8400
ES/Retail: Retail
Batch #: Q745A741
Ship/Packaging Date: 1/11/08
Voltage(s) (Stock/OC'ed): 1.1125/1.344v(load)
Frequency (OC'ed): 3.8Ghz (8.5*475)
Motherboard: GA-P35-DS3L
BIOS: F8f
*Extra* Memory (Frequency): 950Mhz (5-6-6-18)
*Extra* Memory (Brand): OCZ Platinum Rev.2
*Extra* Memory (Voltage): 2.22v
*Extra* Third Party Cooling Solution: TRUE

I had this cpu stable at 4GHz with 1.4v for 4months. It just started giving errors in ORTHOS stress test. So i decided to back down a little.

[wingman99]

CPU: E8400
ES/Retail: Retail
Batch #:Q750A208
Ship/Packaging Date: 03/18/08
Voltage(s) (Stock/OC'ed): 1.225 V
Frequency(ies) (OC'ed): 4.0 GHz 24/7 at 1.39 volts, (prime 95stable)
Motherboard: GA-P35-DS3L
BIOS: F8f

[Oni_kage]

CPU: E8400
ES/Retail: Retail
Batch #: Q813A499
Ship/Packaging Date: 05/01/08
Voltage(s) (Stock/OC'ed): 1.187/1.296 vcore
Frequency(ies) (OC'ed): 4.1 mhz 24/7 Prime95 stable
Motherboard: Asus P5Q Pro
BIOS: 1104

Also 1.187/1.256v under load
stable 4.0 mhz

-----
*Extra* Memory(ies) (Timing(s)): Gskill DDR2 1066mhz 5-5-5-15
*Extra* Memory(ies) (Voltage(s)): 2.1v
*Extra* Third Party Cooling Solution:
*Extra* Paste(s)/Compound(s)/Other(s): MX-2 w/Thermaright 120 Ex with Scyth push pull 1900rmp fans
-----
Additional Comment(s): Runs a little hot... Using realtemp it says 65c... but i feel the temp is suspect as it idles at 39c with the case open at 20c ambient.

[mysterfix]

CPU: E8400
ES/Retail: Retail
Batch #: Q807A297
Ship/Packaging Date: 3/31/08
Voltage(s) (Stock/OC'ed): .99V / 1.32V
Frequency(ies) (OC'ed): 4.3 GHz 478x9 (24/7)
Motherboard: DFI LT X38-T2R
BIOS: Initial bios 11/28
-----
*Extra* Memory(ies) (Timing(s)): Ballistix Tracers DDR2-1148 5-5-5-15
*Extra* Memory(ies) (Voltage(s)): 2.1V
*Extra* Third Party Cooling Solution: Apogee GT
*Extra* Paste(s)/Compound(s)/Other(s): MX-2

[Starlo]

CPU: E8400
ES/Retail: Retail
Batch #: Q746A515
Ship/Packaging Date: Not sure
Voltage(s) (Stock/OC'ed): 1.187/1.272 vcore (load)
Frequency(ies) (OC'ed): 3.9 mhz 24/7 Prime95 stable
Motherboard: Asus P5KC
BIOS: 1203


-----
*Extra* Memory(ies) (Timing(s)): Hyper X DDR2 4G @ 847Mhz(4-4-4-12)
*Extra* Memory(ies) (Voltage(s)): 2.1v
*Extra* Third Party Cooling Solution:Xigmatek S1284C
*Extra* Paste(s)/Compound(s)/Other(s): Xigmatek Thermal Grease PTI-G380

Additional Comment(s): Trying to clock a little faster but I'm coming up short on acount of the RAM.

[PwNZoRNooB]

CPU: E8500
ES/Retail: Retail
Batch #: Q817A or Q814A (Not sure, but I have a feeling it was 817.)
Ship/Packaging Date: Don't remember.
Voltage(s) (Stock/OC'ed): Don't remember/1.2625v
Frequency(ies) (OC'ed): 4000MHz
Motherboard: Asus Rampage Formula
BIOS: 0408


-----
*Extra* Memory(ies) (Timing(s)): G. Skill 5-5-5-15-2T (1000MHz)
*Extra* Memory(ies) (Voltage(s)): 2.0v
*Extra* Third Party Cooling Solution:Xigmatek HDT-S1283
*Extra* Paste(s)/Compound(s)/Other(s): Arctic Silver AS5

[yoan33174]

CPU: E8400
ES/Retail: retail
Batch #: Q817A
Ship/Packaging Date: ?
Voltage(s) (Stock/OC'ed): stock
Frequency(ies) (OC'ed): 4275MHz
Motherboard: Asus P5Q
BIOS: latest as of today.


-----
*Extra* Memory(ies) (Timing(s)): 2GB (2x1) Ballitixs pc2-6400 @ 4-4-4-12 @900MHz
*Extra* Memory(ies) (Voltage(s)): 2.1v
*Extra* Third Party Cooling Solution: Tuniq Tower with 80cfm 120x38mm Panaflow-exhaust(pull), plus the regular tuniq fan inside.
*Extra* Paste(s)/Compound(s)/Other(s): Arctic Silver AS5

[machasm]

ressurecting an old thread but wanted to add my bit
CPU:E8400 'E0'
Es/Retail: Retail
Batch #: Q850A
Ship/Packaging date: 06/08/09
Voltage (Stock/OC'ed): 1.2V/1.2325V
Frequency (OC'ed): 4200Mhz
Motherboard: Gigabyte GA-X48-DS5
BIOS: F8C

[Jod]

I can hit 4000 @ 50C, 4200 @ 60C, or 4400 @ 70C on my E8400 C0.

[freeagent]

this is the best i can do on air, with summer time temps

the voltage i had to use was intense

more then i ever gave my old q6600

wich was alot

http://valid.canardpc.com/show_oc.php?id=598279

[Jod]

So much voltage, CPU-Z couldn't even list it!