**Official e8400/e8500 Retail OC Thread

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10-23-2008, 10:44 PM
misho

Alright guys. SO i assembled PC:

E8500 C0 q818A102, 06,27,08
Biostar tpower i45
OCZ Reaper HPC 8500

So Now I am running at 3800mhz (400 x 9.5,) with 1.216V (under full load), and 1.225V original vcore.

but orthos fails at 21min 24 seconds at the BLEND - stress cpu and ram

what are the safe volts I can increase my cpu and memory to?
10-24-2008, 12:20 AM
HD4870x

Just got a C0 from newegg NJ. So heads up there. But it seems like it's all chance. I sprinkle my CPU, so I'm getting 4.0ghz at 1.3...... Ehh kind of what I expected when the C0 showed. But still nothing to scoff at. Runs cool, bout 45C under load. J'aime. 11 second Super Pi surprised me to say the least though.
10-24-2008, 02:13 AM
gaban

1 Attachment(s)

my C0

hi, this is mine.

E8400 CO
PCP 750watt
Asus P5Q deluxe
OCZ flex 1200
10-24-2008, 03:06 AM
bigwill68

Quote:

Originally Posted by JCGhz

its was 3d stable at lower vcore... but i wanted it prime stable so staying under that 1.3625 very nice.My Idle temps are below 36c but im not quite sure since the sensors are stuck there:)

This is one sweet little 8400 it suprised the heck outta me.
My E8600 took almost 1.5vcore to hit 4.5 which i wasnt happy with.

Glad to see your temps are staying low..:up:Hey jot that batch number down on here and the Package Date...lol ..I would like to know what numbers you have my friend :yepp:
10-24-2008, 07:42 AM
misho

Hey guys !!!
I have a problem
my E8500 C0 is oced to 4Ghz, at 1.302v and 1.290V after vdroop on full load.
Orthos fails memory test, cpu test, and both cpu and ram test.

I cant even reach 4Ghz on 1.3V which is pretty bad..
What should I do? increase memory volts? FSB volts? more CPU volts or maybe chipset volts?

edit: my mobo is tpower i45 and memory is OCZ 2gb reaper HPC DDR2-8500 running at 2.1V stock

edit 2 Orthos is running for over 15mins now.. Its weird, first run always fails, but 2nd time its all good.
Yesterday I did 3.8Gh with some voltage, and orthos failed. So then I tried the test again without changing anything and orthos was running for over 8 hours(I had to stop it)...
10-24-2008, 08:02 AM
Quad-Damage

I have to run 1.38 volts to hit 4.1ghz on my E8500 C0
10-24-2008, 08:06 AM
laragirl83

Quote:

Originally Posted by Quad-Damage

I have to run 1.38 volts to hit 4.1ghz on my E8500 C0

Thats a weak one, u got there:(
10-24-2008, 12:07 PM
Leeghoofd

Currently burning in my new Q828A434 VID is 1.25

Does 8 x 500 with 1.215 volts under load (didn't try lower yet), PLL 1.54 and FSB term at 1.18 once it passes 8 hours I'll post a screenshot otherwise not worth it ofcourse

OCCT 2hour test done on a P5Q Dlx with LLC off

Keep you posted
10-24-2008, 01:05 PM
jaredpace

did you guys notice the E0's have a higher thermal limit? Looks like more room for oc'ing and higher temps. :p:

Intel® Core™2 Duo Desktop Processor E8400
Processor Specifications:

sSpec Number:SLAPL
CPU Speed:3 GHz
PCG:06
Bus Speed:1333 MHz
Bus/Core Ratio:9
L2 Cache Size:6 MB
L2 Cache Speed:3 GHz
Package Type:LGA775
Manufacturing Technology:45 nm
Core Stepping:C0
CPUID String:10676h
Thermal Design Power:65W
Thermal Specification:72.4°C
VID Voltage Range:0.85V – 1.3625V

Intel® Core™2 Duo Desktop Processor E8400
Processor Specifications:

sSpec Number:SLB9J
CPU Speed:3 GHz
PCG:06
Bus Speed:1333 MHz
Bus/Core Ratio:9
L2 Cache Size:6 MB
L2 Cache Speed:3 GHz
Package Type:LGA775
Manufacturing Technology:45 nm
Core Stepping:E0
CPUID String:1067Ah
Thermal Design Power:65W
Thermal Specification:74.1°C
VID Voltage Range:0.85V – 1.3625V
10-24-2008, 01:15 PM
misho

OK Hey guys so after messing around here is what i got:

So at 442x9.5 = 4.2Ghz my stable settings:
CPU:1.376V
NB/SB Voltage: 1.200V
DDR2: 2.096V
FSB: 1.200
CPU PLL Voltage 1.6V

But I tried doing 453x9.5 (4.3Ghz) and orthos fails me in first seconds, pc reboots, really unstable:

Now my question is:
what Can I do to make it stable at 4.3Ghz WITHOUT increasing the vcore because it goes above 1.4V?
Maybe increase the other voltages? Memory settings? etc
Also what are the max safe ranges for the other voltages on the mobo?
BTW Mobo is tpower I45
Edit I turned the vcore one more notch up (1.425) and it was still unstable at 4.3Ghz... I hope I didn't reach the limit :(:(
10-24-2008, 01:32 PM
JCGhz

misho my C0 8400 maxed out @4.2 also... its a good overclock. Better than being stuck @4ghz with the same voltage like some others.
10-24-2008, 02:11 PM
bigwill68

Quote:

Originally Posted by JCGhz

misho my C0 8400 maxed out @4.2 also... its a good overclock. Better than being stuck @4ghz with the same voltage like some others.

I thought you had a EO not CO? :rofl: still waiting on that batch #:shrug:
10-24-2008, 02:58 PM
JCGhz

Quote:

Originally Posted by bigwill68

I thought you had a EO not CO? :rofl: still waiting on that batch #:shrug:

Ive had a 8400C0,E0 an 8500C0 and an 8600 E0 of course..I currently only have E0's 8400 and 8600 using the one in this thread.. btw batch code is in my first post with my e8400@4050 in this thread.

anyway its an Q820A844 pack date 8/5/08
10-24-2008, 03:29 PM
misho

Quote:

Originally Posted by misho

OK Hey guys so after messing around here is what i got:

So at 442x9.5 = 4.2Ghz my stable settings:
CPU:1.376V
NB/SB Voltage: 1.200V
DDR2: 2.096V
FSB: 1.200
CPU PLL Voltage 1.6V

But I tried doing 453x9.5 (4.3Ghz) and orthos fails me in first seconds, pc reboots, really unstable:

Now my question is:
what Can I do to make it stable at 4.3Ghz WITHOUT increasing the vcore because it goes above 1.4V?
Maybe increase the other voltages? Memory settings? etc
Also what are the max safe ranges for the other voltages on the mobo?
BTW Mobo is tpower I45
Edit I turned the vcore one more notch up (1.425) and it was still unstable at 4.3Ghz... I hope I didn't reach the limit :(:(

^^^ So what do you think is limiting me here? What should I try increasing (other than vcore) and to what safe levels
10-24-2008, 04:38 PM
OCX600RR

Finally put my new system together today and i'm pretty shocked lol. As some of you might have read my Sunbeam CCF didn't fit on the EP45-UD3P so I'm using a stock Intel cooler at the moment, the ones Intel shipped with the 65nm Conroes which are like 3 times beefier than the new 45nm coolers Intel ships with their chips.:p:

Anyway, decided to see what I could achieve on the stock cooler and wow, pretty amazed haha. Not done yet!!

E8400 E0 Batch #Q825A652
EP45-UD3P F4 BIOS
4GB Mushkin DDR2-800 @ 1000MHz 5-5-5-15 2.0v

http://img373.imageshack.us/img373/6224/45eh8.jpg
10-24-2008, 07:51 PM
AzN_plyR

http://i58.photobucket.com/albums/g2...rimestable.jpg

No time to try and go higher, but will do later after I get tired of FC2 :)
10-24-2008, 07:59 PM
misho

damnit how do I get past 4.2Ghz without increasing the vcore ?
10-24-2008, 08:19 PM
LagunaX

Quote:

Originally Posted by misho

damnit how do I get past 4.2Ghz without increasing the vcore ?

Try bumping up your northbridge.

On my asus p5k vanilla it tkaes 1.4v for 4.2ghz on an old C0 e8400.
On my DS3L it takes more than 1.2v also - 1.3v I think but can't remember.

Anyways try 1.4v and then see if you can drop it from there to 1.3 or 1.25v.
10-24-2008, 09:25 PM
misho

Quote:

Originally Posted by LagunaX

Try bumping up your northbridge.

On my asus p5k vanilla it tkaes 1.4v for 4.2ghz on an old C0 e8400.
On my DS3L it takes more than 1.2v also - 1.3v I think but can't remember.

Anyways try 1.4v and then see if you can drop it from there to 1.3 or 1.25v.

OK will try that right now. I also ran memtest86 and it passes all tests just for heads up...

**EDIT**
OK so I bumped up the NB voltage to 1.376V (this was in the red settings now-kinda got scared) and same problems happen. orthos fails etc, and now i am getting VPU recovery sometimes too. (so i think 2 much voltage for the bridges)..
wwhat can I do now...
10-24-2008, 09:49 PM
HDCHOPPER

ok just got 3 more E 8400 from fry's weekend sale

all are batch Q818's any good ????

the 1 in my hans atm is a Q818A695... SLAPL

wayyyy too many post here to search them all :D
10-24-2008, 10:23 PM
misho

Quote:

Originally Posted by HDCHOPPER

ok just got 3 more E 8400 from fry's weekend sale

all are batch Q818's any good ????

the 1 in my hans atm is a Q818A695... SLAPL

wayyyy too many post here to search them all :D

Well I have E8500 C0 q818A and it looks like I am getting a limit at 4.2Ghz with 1.376vcore.... but I still need some help testing for higher speeds without increasing vcore
10-24-2008, 10:38 PM
HDCHOPPER

well heck thats average
love cherry picking but eye need better batch numbers to find the golden ones :rofl:
thanks
10-24-2008, 10:38 PM
DOM.

Quote:

Originally Posted by HDCHOPPER

ok just got 3 more E 8400 from fry's weekend sale

all are batch Q818's any good ????

the 1 in my hans atm is a Q818A695... SLAPL

wayyyy too many post here to search them all :D

SLAPL is C0

got my E8500 E0 today still looking to get a 24/7 clock did pi at 9.5X500 1.47
10-24-2008, 10:58 PM
misho

Quote:

Originally Posted by Dom7184

SLAPL is C0

got my E8500 E0 today still looking to get a 24/7 clock did pi at 9.5X500 1.47

At 1.47V a 24/7 clock is not safe lol. Try under 1.39V or something
10-24-2008, 11:06 PM
DOM.

Quote:

Originally Posted by misho

At 1.47V a 24/7 clock is not safe lol. Try under 1.39V or something

naw it was just for benching test

i was just going to ask what is safe for 24/7 1.35 or 1.4 or 1.45 ive seen alot of different opinions :confused:

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