Week/Batch numbers and highest stable overclocks for Core 2 Duo

[Kantana]

Pls submit your highest stable overclocks with the model processors, the batch numbers, Vcore used, motherboard used, cooling used and highest temps. Trying to consolidate into a table so that we can see if particular batches/weeks do particularly well. Will help those trying to buy a good overclocker.
Let me start with 2 of mine.

Intel E6400
Batch L624A768
Asus P5W DH
3.5G dual prime stable (438FSB)
1.5 Vcore
Corsair Cool water cooling
57 degrees C

Intel E6600
Batch L623A550
Asus P5W DH
3.6G dual prime stable (400FSB)
1.5375 Vcore
Corsair Cool water cooling
61 degrees C

Just changed the Corsair Cool water as the reservoir developed a leak. Didn't have any high powered heatsinks around so went down to the local computer center and picked up a Tuniq Tower 120. Spent 2 hours removing the water cooler and fitting the Tuniq, took a long time!

Anyway started up the system and got some new figures, used the E6600 and left all previous settings alone and noticed that the temps had dropped! Using the huge Tuniq Tower 120 dropped the temps compared to a water cooler, couldn't believe it. The system is still dual priming right now after 90 mins, readings are:

Intel E6600
Batch L623A550
Asus P5W DH
3.6G dual prime stable (400FSB)
1.5375 Vcore
Tuniq Tower 120 on high
55 degrees C

Gives me hope that I can reach for higher overclocks with lower temps and if I reach a thermal wall again I'll just switch to a faster fan in the Tuniq Tower. :)
Anyone know any better heat sinks than the Tuniq Tower? Thermalright Ultra 120?

[lawrywild]

INtel E6600
Batch L624A600
Asus P5W DH
3.4G dual prime stable
1.575v
Aircooled XP-90C
Around 60C with Asus probe/around 73 with CoreTemp

[Kantana]

Thanks! I see you get the same discrepency in the temps reported in the cores and that of the motherboard. Anyone else encounter the same thing? The difference is ~15 degrees C here on the P5W DH so hitting max temp of 85 Degrees C on the core would be ~ 70 degrees C on the motherboard. I assume this is when the thermal throttleing will start?

[Plaicd]

Are all conroe/allendale from the same plant or some from taiwan,costa rica ect.?

So far all I have looked at in pics here are marked Malay.

Is the plant incoded in the batch numbers?

[lawrywild]

MALAY(SIA) here

[Kantana]

Only seen Core 2 Duos from Malaysia here. Guessing the batch numbers are assigned to 1 plant only.

[Shrekogre]

I believe the chip will be made is USA, only the packaging done in Malaysia

[dissident]

Intel E6400
Batch L624A849
Gigabyte DS3
3.3G prime stable at 1.5 volts (don't want to take it higher)
~50 degrees load on water (lapped IHS)

[theteamaqua]

L625 week 25 is better from what i have seen .. 3 months later ill prolly get anoither one if i can burn my E6400 , i meant literally burn it, so i have a reason to get another one ...

E6400 week 25 can do 3.5 , 3.6GHz ... mine only go as high as 3.4GHz with as much vcore as i can give ...

[davefr]

Are all conroe/allendale from the same plant or some from taiwan,costa rica ect.?

So far all I have looked at in pics here are marked Malay.

Is the plant incoded in the batch numbers?

The assembly plant is meaningless. What's important is the specific Fab plant, Fab lot #, wafer # and die location and where that wafer Fab was running in terms of normal process variance at the time the wafer was produced.

[Plaicd]

The assembly plant is meaningless..
I know with other intel cpu's some plants were considered to put out better overclockers than others.

Maybe cause some fab plants tend to feed certain end assembly plants?

[Eastcoasthandle]

The assembly plant is meaningless. What's important is the specific Fab plant, Fab lot #, wafer # and die location and where that wafer Fab was running in terms of normal process variance at the time the wafer was produced.
And where do you get this info? Is it on the CPU?

[davefr]

I know with other intel cpu's some plants were considered to put out better overclockers than others.

Maybe cause some fab plants tend to feed certain end assembly plants?

Yes and actually some Fab plants feed a batch of sorted material to certain assembly plants at approx. the same time and thus the reason to correlate OC success to an assembly date code. (it's really the Fab material that matters)

The die's specific location on the wafer is even a factor. (ex: I believe the edge die tend to run a tad faster due to slightly lower channel length).

However the biggest factor is downbinning. If a CPU manufacturer is yielding fast material but most of the demand is for medium to slow then die that have been tested to yield to fast speeds can be downbinned to fill that market.

However I have a feeling that Intel isn't doing any Conroe downbinning at this point!! However they probably will after the product matures.

[fhpchris]

Yes and actually some Fab plants feed a batch of sorted material to certain assembly plants at approx. the same time and thus the reason to correlate OC success to an assembly date code. (it's really the Fab material that matters)

The die's specific location on the wafer is even a factor. (ex: I believe the edge die tend to run a tad faster due to slightly lower channel length).

However the biggest factor is downbinning. If a CPU manufacturer is yielding fast material but most of the demand is for medium to slow then die that have been tested to yield to fast speeds can be downbinned to fill that market.

However I have a feeling that Intel isn't doing any Conroe downbinning at this point!! However they probably will after the product matures.

I think they do have alot of problems getting good 4mb cache yields, and that is why 6600/6700 stuff is nowhere, or really slow, where alot of good 6400 stuff seems to exist.

IMHO even if you can buy a 6600 now, it will probably be crappy...

[theteamaqua]

from what i have seen and many PMs... in many forums .... week 25 which is batch #L625XXXXX is much better OCer compare to week 24

[davefr]

I think they do have alot of problems getting good 4mb cache yields, and that is why 6600/6700 stuff is nowhere, or really slow, where alot of good 6400 stuff seems to exist.

IMHO even if you can buy a 6600 now, it will probably be crappy...

It's much more likely that Michael, Steve, and Mark have first dibs on the E6600 and E6700's!!!

[irev210]

I think they do have alot of problems getting good 4mb cache yields, and that is why 6600/6700 stuff is nowhere, or really slow, where alot of good 6400 stuff seems to exist.

IMHO even if you can buy a 6600 now, it will probably be crappy...


i think that intel is more interested in trying to get the product into the retail market... while woodcrest is busy sucking all the 4mb cache cores.


Your best bet is to judge major OEM's like DELL and HP. When they have mass shippable quantities of core 2 duo's, so will we.


Right now it is looking like 3 more weeks before much better avalibility.



I really wish I knew the yields at intel, but they have been on 65nm in full production for over 8 months now. they have been making fully functional ES YONAH's back in may/june of 05.


I think they have more of a supply chain/capacity problem. You cant flip the switch and say bye to all those other processors that they are stuck supporting, making, and supplying.


Wish they could though :)

[gundersausage]

Anyone know what week 26 is like?

[Evilsizer]

E6400
7/23/2006
L624A869

no oc yet still working on installing windows.

[theteamaqua]

E6400
7/23/2006
L624A869

no oc yet still working on installing windows.

try go for 3.6GHz ... i bet it will stop after 425fsb ...

[nicepun]

BATCH:

http://img511.imageshack.us/img511/7779/1001270lu4.th.jpg (http://img511.imageshack.us/my.php?image=1001270lu4.jpg)

Well my friends, here what I have so far. It is true, the ES chips kick butty because this bastard likes voltage as you can in AiBooster. I'm not sure if this is stable so I'll be doing some more testing to find my sweet spot. I don't see 4Ghz happening, sorry.

http://img504.imageshack.us/img504/8272/conroecx6.th.jpg (http://img504.imageshack.us/my.php?image=conroecx6.jpg)

I'll do some more testing tomorrow, so far I think 3.56Ghz @ 1.6vcore in bios is my highest stable OC. I was aiming for 3.5/3.6 so and/or 14secs 1m SuperPI and so far 3.56 does 14.6 and I still have stuff running in the background. For 24/7 use I'll leave it at 3.4Ghz@1.5vcore in BIOS.

[ceevee]

X6800 "Xtreme" Edition

3.6Ghz rock solid dual-prime stable stock cooler

1.50V BIOS

55C full load air cooling

32C resting temp

right now 277 FSB, x13 CPU multiplier, but this is subject to change

I still have a lot of tweaking to do, and will add water cooling. I am positive this thing will get to 3.8Ghz :D :D :D

3.8Ghz will be great!!

BATCH # L623A465

:fact:

http://img160.imageshack.us/img160/2825/screen01mt2.th.jpg (http://img160.imageshack.us/my.php?image=screen01mt2.jpg)


--edit--

and post #100 !!! It took me six months! At this rate I will have as many posts as Charlie in about 48 years!! :p:

[ArcTan]

E6400 L624A774
Gigabyte DS3
2 x 512MB 5400UL

so far I've done 400x8 dual 32M fine but prime will fail immediately
aircooled with XP90C and 18db 92mm fan

edit: also got E6300 Step 5 QPHC
480x7 small fft's overnight stable stock vcore though limited by board

[Pete]

E6700 Es Stepping 4 B0 QLLO

4.2ghz phase!
4.6Ghz LN2
3.7ghz air stock cooler

[nicepun]

Unless you're on Phase or LN2, I believe the average OC for these E6600 Retail (OEM also) will be 3.4Ghz~3.6Ghz!!

[Dumo]

try go for 3.6GHz ... i bet it will stop after 425fsb ...Heres...With stock HSF

http://img301.imageshack.us/img301/7118/screenshot121yl4.jpg

http://img46.imageshack.us/img46/7687/screenshot117hm1.jpg

6600 B1 or B2 need a good cooling to be able to oc high...

[dinos22]

Heres...With stock HSF

http://img46.imageshack.us/img46/7687/screenshot117hm1.jpg
what's your batch Dumo

[Shrekogre]

Anyone a Retail 6600 that can do over 3.6 on air/water and has a batch no.?

[Nephilim]

what's your batch Dumo

As per the image in his post L624A849

[Dumo]

what's your batch DumoHeres Dinos:)

http://img515.imageshack.us/img515/3821/screenshot125se4.jpg

http://img157.imageshack.us/img157/7240/screenshot116hm0.jpg

Will freez it next:)

[dogsx2]

Is the DFI board the one you feel is the best for you until the RD600 comes out?

[Dumo]

Is the DFI board the one you feel is the best for you until the RD600 comes out?Its speedy, but bios revision badly needed to run >400FSB 1:1.

Will try MSI 975 Ver. 2.B:)

[Pete]

Nice one Dumo, love how you sneak that ''i'll freeze it next'' in there heheh

Thats on the -100c taxi cab cascade?

[boostedevo]

E6400 L624A869 - pack date 7/23
Gigabyte DQ6
2GB XMS2 6400C3
Water / 1.55Vc / No clue on temps, but no throttling :)

If I can get past the 480FSB wall on this board, I'll freeze it too...100% OC on this would be oh so nice :D

http://www.maxclocks.com/e6700/32m_475_4449.png

[ocZZZ]

Still testing but:

E6400 L624A264 - pack date 7/13
Gigabyte GA-965P-DS3
2GB Team DDR2-667

3.2ghz @ 1.5v - 60c dual prime with a ninja


Also, it's amazing just how fast this chip is. I am coming from a 2.8ghz opteron 165 and this is much faster with general windows use. Everything is INSTANT (would have a slight pause with my AMD setup). Then again, I've had a :banana::banana::banana::banana:ty celeron for the last 4 weeks so I may be overreacting :)

[Eastcoasthandle]

Does anyone know about Week 23? Is it a decent OC CPU?

[BigDisk]

E6400 L624A869 - pack date 7/23
Gigabyte DQ6
2GB XMS2 6400C3
Water / 1.55Vc / No clue on temps, but no throttling :)

If I can get past the 480FSB wall on this board, I'll freeze it too...100% OC on this would be oh so nice :D


:woot:
Got the same batch!

will test tomorrrow

[fornowagain]

E6600, Retail Step 6 B2, L623 A790

ASUS P5W-DH bios 0903, Air cooler Tuniq 120, G.Skill HZ 6400 4-4-4-12 800

3.5GHz @ 1.45v Primed, Temps 44C with ambient 20C
3.6GHz @ 1.55v (bios) primed. Temps 50C with ambient 20C
http://img105.imageshack.us/img105/1496/36x12ls4.th.jpg (http://img105.imageshack.us/my.php?image=36x12ls4.jpg)

3.7GHz @ 1.55v Pi and windows stable. Would prime with 1.6v+, but I ain't planning on trying that anytime soon.
http://img480.imageshack.us/img480/2535/37x0jq7.th.jpg (http://img480.imageshack.us/my.php?image=37x0jq7.jpg)

[Tallman]

REtail box 6700 L623A549 (week 23)
Board, cooler and ram in sig

32M stable @3.6 Ghz 1.5 vcore
1 M stabe @3.75 1.55 vcore
Windows screenshot @ 3.8 1.6 vcore<a href="http://img98.imageshack.us/my.php?image=375fsblk5.gif" target="_blank"><img src="http://img98.imageshack.us/img98/1691/375fsblk5.th.gif" border="0" alt="Free Image Hosting at ImageShack.us"/></a> <a href="http://img98.imageshack.us/my.php?image=380fsbfy8.gif" target="_blank"><img src="http://img98.imageshack.us/img98/4939/380fsbfy8.th.gif" border="0" alt="Free Image Hosting at ImageShack.us"/></a>

[ceevee]

isn't the title of the thread "highest stable overclocks" ??

but most people just show superpi? running superpi means nothing (I can run superpi at 3.8Ghz stock cooler, but not dual prime stable :stick:)try to dual prime for at least an hour and then report..

by the way my data:

BATCH #L623A465

so that means week 23 right?

maybe the OP could update the first post with a summary of the results so it would be easy to see??? That would be great:)

[badboy]

Heres Dinos:)

http://img515.imageshack.us/img515/3821/screenshot125se4.jpg

http://img157.imageshack.us/img157/7240/screenshot116hm0.jpg

Will freez it next:)
That is the same exact one I have but I need better memory.

[bobov]

Retail box E6700 L623A549

32M stable 3.6G 1.5v vCore

[Plaicd]

e6400-L624A89 3.2ghz air cooled asus p5w-dh.
Might have more in it but leaving it here for a couple of days.

[AndreYang]

E6300 L625A705


http://www.iamxtreme.net/andre/P5B-0505-500-1.JPG

[xpsentity]

Week 24 E6600.

Windows/game stable @ 380, 1.40V Bios, all other voltage auto.

SPD timings, damn board :mad:

Dual SP stable @ 1.45V, other settings same as above.

Air cooling, idle 30~, load 42~.

Edit: 100th post!

[Supertim0r]

E6700 and XE6800 coming directly from intel tomorow or monday
will update when I test it (don't know if it's ES or retail yet)

[Hassan]

Retail e6700 3.6 dual prime Stable @ 1.5V with coretemp showing load temps at 69C on air... will try water next.

[zizo]

E6300 L625A705


http://www.iamxtreme.net/andre/P5B-0505-500-1.JPG

So how is the new bios for P5BD? :clap:

[Dynasty]

Its speedy, but bios revision badly needed to run >400FSB 1:1.

Will try MSI 975 Ver. 2.B:)

If DFI, MSI & Asus followed intel D975XBX strap option ->1067/1333
we would be alot better off. ;)

[Primoz78]

E6600 retail L624A7XX on Asus P5W DH all benches stable @ 3,6ghz 1.50V but not prime stable :confused:. Under water cooling idle temp 31°C full load temp 40°C seems the HS is really good placed :clap: Will try to get it prime stable at least @ 3,4ghz....:stick:

Regards,
Primoz

[xpsentity]

Should be good @ 1.45 Bios for 3.4 Prime stable. Orthos bombs on me, but dual SP2004 instances are fine. Can run all other benches at 1.4250, no problems.

I'm really liking the week 24 6600 I've got here, temps and OC have been quite good to me, not counting the SPD thing with P5W...

[bugeyes]

So how is the new bios for P5BD? :clap:

well it looks dam good if he's pulling 500MHz FSB, hope the conroes can do the same!

[Chri$ch]

http://people.freenet.de/chris07071985/C2DE6300/E6300-2.jpg

VCore @ 1.3v in Bios (def. 1.325v) on DS3

http://people.freenet.de/chris07071985/C2DE6300/Prime-1.jpg

[Dumo]

7/30 packing date already in retail:)
Intel really cranked up production....Wonder when they will pack B3s;)

[dinos22]

B3 already....nice

got a L624A today E6400

so far prime stable 3.4GHz 1.45v

[ferds]

just got my cpu this morning but i dont have the rest of my system yet. hopefully they will arrived by nextweek..

here's what i got:

E6300
L623A755

i wonder how this thing overclocked with a DS3 mobo..

[dinos22]

B3 already....nice

got a L624A today E6400

so far prime stable 3.4GHz 1.45v


3.5GHz 1 Hour Prime 1.49v
http://img141.imageshack.us/img141/7629/35ghzprime1hour149vcore51cloadip0.jpg (http://img141.imageshack.us/my.php?image=35ghzprime1hour149vcore51cloadip0.jpg )

[Miwo]

Tankguys are receiving there next shipment around the 15th. Hopefully some new Intel chips with different batches. Week 26 or... B3 maybe? *keeps fingers crossed*

[Dase]

E6600 week 24 on a DS3. 366 FSB (3.3 GHz), dual prime stable. Ninja+ air cooling, 58C tempwhile priming (coretemp reports 68C). 1.4875 cpu volts in bios, all other bios settings set to auto. Couldn't make 375 fsb stable. Only bios settings that seemed to help me OC is cpu voltage and I'm not willing to go over 1.5.

[kiwi]

E6300
L624A807

Gigabyte DS3
3.4Ghz benchable (http://img220.imageshack.us/img220/1784/32m3400ma8.jpg)
3.35Ghz stable

1.425-1.45V

[SteveS]

Just picked up my E6600.
Batch number L624A815
Pack Date 07/29/2006

Waiting on the rest of the parts now, but I have prep's my MBoard as per the Sticky.

Its going to be interesting on what sort of speeds I can get out of it.

[GOESA]

My 6600 Stepping 5 B1 does 11 hours prime @ 400fsb*9 - 1,465v

But it won't go much higher then that.

11 hours orthos primestable (http://peecee.dk/?id=50907&noresize=yes)

/Grau

[CedricFP]

Hmm.. after all those ES' were hitting 4.5ghz, I was hoping more out of Conroe OC'ability.

Looks like Allendale is the way to go though. 6300 @ 3.6 is awesome.

[cliffy]

My E6300 OEM is a week 26 chip, so far can oc up to 3.15Ghz at stock volts but have hit the wall and dont know how to get over it:(

[KaXXeN]

Just picked up my E6600.
Batch number L624A815
Pack Date 07/29/2006

Waiting on the rest of the parts now, but I have prep's my MBoard as per the Sticky.

Its going to be interesting on what sort of speeds I can get out of it.


nice batch i got exactly the same here batch and packdate ;) drop me a PM and tell me how it does. got a p5w DH deluxe on the way to me and then im ready to go :)

[doom_st]

Just picked up my E6600.
Batch number L624A815
Pack Date 07/29/2006

Waiting on the rest of the parts now, but I have prep's my MBoard as per the Sticky.

Its going to be interesting on what sort of speeds I can get out of it.

i have the same on ds3 mobo.It can do 3240 with stock volts/cooling.
On phase 440x9 1.6v spi 1m.I think it can do more...

[The Stilt]

E6400 OEM
FPO: L625A538

Does 3430MHz with stock cooler and 1.325V (SuperPI 32M).
With Tuniq Tower 120 and 1.49V it ran SP2004 at 3640MHz (455x8).
455FSB seem to be the maximum stable frequency for my 6400C3 sticks.

I must test it on Biostar too.
Rick from Biostar sent me a new bios for the board, which allows FSB up to 600FSB (instead of 500FSB). It also seems that some of the chipset latencies has been changed too..

http://www.armada.fi/E6400_OEM/E6400_3.64GHz_SP2004-2.gif

[mach82]

please tell me - is it better a have a CPU with a lower batch or is it better to have a CPU with a higher batch? Or perhaps there is no rule. I have a week 25 CPU (E6400) batch A287. I can't test it right now, as my MOBO will be delivered to me on Tuesday. I'm curious, hence I've decided to ask the question.

[Drow]

@The Stilt
Please post your results with the new BIOS on the Biostar, when it's done.

[Cocacola]

@the stilt
very nice result..
is that board modded?
my p5wdh can only do 400FSB.. with my E6300 anything higher it will not boot..
Vmch@1.65v

maybe u could share me what setting u use in bios to get over 450FSB.

[Moonraker™]

Hi guys,

Just read in another thread someone saying they got their Conroe (E66), they took a pic of the chip and it read L623A738 (link to image (http://img212.imageshack.us/img212/7918/e6600sxq4.jpg)).

Yet mine says L623A790. So I thought some "in the know" guy here will know!..

It may not be a big thing, but what does that mean? Is it manufacturer dates etc. Or revisions. I've searched around. But "Conroe Numbers" brings up overclocking scores! (shock! he he)

On a side note... I need to let out some anger.... ARRRRRRRRRGH It's taking me too long to buy this system of mine. It's f'kin annoying. I can't help if I ain't loaded! JESUS!

I'm ok now.

[kiwi]

L=plant #, Malaysia
6= year
23= week
A738 = batch number

[Moonraker™]

Ãœber. Cheers m8.

There's no known bad batches are there?? lol.

[kiwi]

http://www.xtremesystems.org/forums/showthread.php?t=110564

[The Stilt]

This is on Biostar:

http://www.armada.fi/E6400_OEM/E6400_4.2GHz_SPI8M.gif

VapoLS & 1.525V

Yes, that is still with the "old" A803 bios.
Stock heatsink on MCH too ;)

Cooling down the MCH has a clear effect since I cannot set tRP to 3 CLK and tRAS to 4 CLK with the stock heatsink like I could with MCX-159R :D

[Moonraker™]

Well if I'd have know now what I knew before search! lol. - Cheers kiwi.

This can be locked / deleted now!

[Moonraker™]

E6600, Retail Step 6 B2, L623 A790

ASUS P5W-DH bios 0903, Air cooler Tuniq 120, G.Skill HZ 6400 4-4-4-12 800

3.5GHz @ 1.45v Primed, Temps 44C with ambient 20C
3.6GHz @ 1.55v (bios) primed. Temps 50C with ambient 20C
http://img105.imageshack.us/img105/1496/36x12ls4.th.jpg (http://img105.imageshack.us/my.php?image=36x12ls4.jpg)

3.7GHz @ 1.55v Pi and windows stable. Would prime with 1.6v+, but I ain't planning on trying that anytime soon.
http://img480.imageshack.us/img480/2535/37x0jq7.th.jpg (http://img480.imageshack.us/my.php?image=37x0jq7.jpg)

I've got the L623A790 as well :D

Looks like you have good results. My rig isn't up and running yet :(

Interesting how it says "1.35v MAX". lol

[kiwi]

Any retail 4MB Conroe with at least 9x450 on 965 board any cooling?

[Moonraker™]

Any retail 4MB Conroe with at least 9x450 on 965 board any cooling?
Most retails seem to halt at 3.6ghz. which is poor. But nothing some extra cooling on the NB can sort out. Apart from the mad guys like Sierra etc. I've only seen a few of go 3.7ghz and one or two above that.

Stable is another matter though!

[mine]

moonraker
no offense

but hmmm ... your signature slide show ....hmmmm :eek: :eek:

[kiwi]

I don't really understand, 4.5Ghz ES (and today even 5Ghz) http://valid.x86-secret.com/show_oc.php?id=112009

But retail can't even pass 4Ghz? Someone told me about different strap with 4MB conroes but why then ES have no problems

[Moonraker™]

moonraker
no offense

but hmmm ... your signature slide show ....hmmmm :eek: :eek:

Nevermind Kiwi not understanding the ES vs. the Retail (which i don't get either!) but I don't understand this post?!?!

What you mean? No offense? what you getting at m8?

[ewitte]

I don't really understand, 4.5Ghz ES (and today even 5Ghz) http://valid.x86-secret.com/show_oc.php?id=112009

But retail can't even pass 4Ghz? Someone told me about different strap with 4MB conroes but why then ES have no problems

For those posts you need to look at what cooling they are using. Not a sinle one running 4.5Ghz plus was running air/water. This is what you need for over 5Ghz:

- Lucky chip
- Very skilled overclocker that knows vdroop, etc mods
- LN2, cascade, etc.

Eric