Core i7 Overclocking by Batch #

[FragMagnet]

Didn't realise I was on that list sorry for the delay, I don't think this batch is very good, but for over 3 hrs of prime stable these are the results

3.8 HT on (181x21) 1.39v under load (temps high 80's)
4.05 HT off (193x21) 1.39v under load (temps low 70's)

I'm still deciding whether to hunt down another chip, or get better cooling ?

edit: I just added a 3837A908 to the arsenal, results later tonight

[liftedcj7on44s]

i have a crappy chip as well. its a 3837A732 and i cant seem to get 4ghz stable no matter what voltage. It might be my temps though. with 1.35 vcore with HT enabled it hits 87c with a TRUE and 2 120's push/pull.

[Avan]

First post is updated with the charts, just giving a heads up to those who go straight to the last page.

Nice! Do you need me to keep updating my list? Or do you have it under control now?

[FragMagnet]

Just noticed EVA2000's results are not on the list ! Now that's a golden cpu !!
http://www.xtremesystems.org/forums/...postcount=2127

[GenTarkin]

Can add my chip if you wish, along with the rest of the crappy 3836B processors =(
3.8ghz ( 181x21 ) 1.25v HT Off Stock intel cooling max temps: 83C

[FragMagnet]

Didn't realise I was on that list sorry for the delay, I don't think this batch is very good, but for over 3 hrs of prime stable these are the results

3.8 HT on (181x21) 1.39v under load (temps high 80's)
4.05 HT off (193x21) 1.39v under load (temps low 70's)

I'm still deciding whether to hunt down another chip, or get better cooling ?

edit: I just added a 3837A908 to the arsenal, results later tonight

Well it's a little better than my last chip, but for the most part nothing special. I gained approx 200 mhz in each of the above scenarios. It showed me my BCLK limitation at that point was CPU, and not mobo/mem. The vcor is getting up there , with the temps on air as well. But I'm not going to complain about 4Ghz with HT on air. So it's a good chip for me, but don't seek it out if your expectations are higher.

[killerhz]

Well, just trying to get a stable OC @ 3.833ghz HT on batch # 3837B215 for a 24/7. I have been bumping down the vcore and am sitting at 1.258 Ran LinX 20 X for stability and is good. My temps are not ideal for my cooler so I may need a re-seat and better application for my TIM. Still not to bad and am going to try and lower my voltages to see if I can get any lower.


Also cooling is with a copper TRUE

[peebee]

That is just, what I was looking for. But 3839Bxxx is still not in here right? Anybody seen that Batch? (i7 920)

[Avan]

Found a 3831A ES on ebay earlier. This must be a real early run, I wonder what the earliest week they made was.

Oh, for those interested... http://cgi.ebay.com/Intel-Core-i7-92...ayphotohosting

[ReverendMaynard]

heard the early ES ones were terrible.

[Avan]

heard the early ES ones were terrible.

Yah, I have no intention on buying it, just was mainly commenting on the week#

[The Nemesis]

heard the early ES ones were terrible.

Yeah pretty sure if it was golden it wouldn't be on ebay. And if it ws it wouldn't be cheap.

[Hazzan]

Found a 3831A ES on ebay earlier. This must be a real early run, I wonder what the earliest week they made was.

Oh, for those interested... http://cgi.ebay.com/Intel-Core-i7-92...ayphotohosting

I think we must be careful with ES cause not warranty....... i7 very risk to die...

[anzial]

Can add my chip if you wish, along with the rest of the crappy 3836B processors =(
3.8ghz ( 181x21 ) 1.25v HT Off Stock intel cooling max temps: 83C

I don't think you should be complaining, I mean, you are on STOCK cooling of pete's sake!

[JWMc]

Updating my result for the batch comparison: (3841A383 from Newegg):

4.2ghz (21x200), HT on, 89c max temp @ 18c ambient, LinX x 20.

http://www.xtremesystems.org/forums/...postcount=2283

[Yahyaue]

Here is my shot of a 6 hour tour of P95 small ftt.
Batch "3837A766"

[The-Fox]

Hey Yahyaue,
I got the same batch exactly as Yours
Try 1.425v Vcroe for running 4.2Ghz with HT=on.
It works for me, at least for LinX.

[JWMc]

Here is my shot of a 6 hour tour of P95 small ftt.
Batch "3837A766"

You need to update to RealTemp 2.90. 2.70 reports incorrect temps for i7.

[safan80]

i have a crappy chip as well. its a 3837A732 and i cant seem to get 4ghz stable no matter what voltage. It might be my temps though. with 1.35 vcore with HT enabled it hits 87c with a TRUE and 2 120's push/pull.

what does it take to get 3.7Ghz or 3.8Ghz?

[namegt]

i7 920 Batch [3838B079]

i7 920 HT on Threads 8

CPU i7 920
Mainboard EVGA X58 3X SLI
RAM samsung DDR3 1G PC3-10600U CL9 1x3
VGA EVGA GeForce GTX 260
Power Topower Octopus 1500W
Cooler WATER [GTZ]
OS WINDOWS XP PRO SP3 [OEM]
BIOS 12/29


i7 920 @ 4.2G
Threads 8
1000MHz 9-10-10-30 2T
32M pi


i7 920 @ 4.5G
Threads 8
32M Pi


i7 920 @ 4.6G
Threads 8
1M Pi


i7 920 @ 4.65G
Threads 8

This thread ...
http://www.parkoz.com/zboard/view.ph...c=asc&no=14613

[YukonTrooper]

what does it take to get 3.7Ghz or 3.8Ghz?

Stock cooler with both.

[liftedcj7on44s]

what does it take to get 3.7Ghz or 3.8Ghz?

I can actually do 4ghz 100% stable with 1.36 vcore with HT off. I cannot get 4ghz with HT turned on stable no matter what voltage i use.
But. i have been running 4ghz(211x19) 1.36vcore with HT turned on for a week now and have not experienced a single problem. but if i run prime or linx i get a BSOD within a minute.
Do you have the same batch??

[jVIDIA]

nameGT, that's a nice CPU mate. How mutch vcore does it need to do 4000MHz ?

I'm also going to get one 3838B079, and hope to have some luck with it also

Anyone more with ane 3838B079 ?

[namegt]

3838B079 here be

http://www.parkoz.com/zboard/zboard....0&keyword=b079

3838B079 it shows a similar yield.

[roller11]

batch# 3836A977

i7 920
giga ud5
Tuniq Tower 120

5 passes of Linpack 4011 Mhz, 1.184 Vcore, 75F
prime95 4011 Mhz, 1.184 Vcore, 4 threads, 75F ambient
prime95 4200 Mhz 1.264 Vcore, 4 threads, 75F
prime95 4305 Mhz, 1.344 Vcore, 4 threads, 75F

superpi 4578 Mhz, 1.456 Vcore

see i7 overclocking thread for validation screens