Core i7 Overclocking by Batch #

[frag85]

CPU:
920 D0 SLBEJ 3903A468 (purchased June 30th 2009)
4.2ghz (200x21) HT OFF

1.2875 in bios (1.325v with LLC off), 1.264v under load
1.34v QPI/tt (<1.32 and >1.36v cause 0X00000124 BSOD's)
1.24 QPI PLL

stock 133x20 does 1.00v in bios on auto and is stable, but needs 1.2v QPI/Vtt. i take that as good vCore binning.

Cooling:
noctua nh-u12p


core 4 always reads 4-6C cooler than cores 1+2.

as stable as: 48 hrs Prime 95 Small FFT + 48 hs custom Blend + 24 hrs Linpack (left running and went out+forgot about it )+ 24 hours furmark+Prime blend all without rebooting.

been running for 6 months with no un-expected program errors/crashes.

[madmax999]

Have you tried to get 4.2GHz with HT enabled? What vcore do you need then?

[r0ckS0LiD]

Have you tried to get 4.2GHz with HT enabled? What vcore do you need then?

Same question here, I can set 3800 (200x19) at 1,20V Full Stable but 200x20 or 200x21 not stable at 1.3V+ with HT ON (+0,1V jump and it isn't stable). With HT OFF no problem at 1,2825V. What vcore do you need to 4.2Ghz with HT enabled?

[ChaosAD]

Same question here, I can set 3800 (200x19) at 1,20V Full Stable but 200x20 or 200x21 not stable at 1.3V+ with HT ON (+0,1V jump and it isn't stable). With HT OFF no problem at 1,2825V. What vcore do you need to 4.2Ghz with HT enabled?

You have to do some testing to find out. Not all cpus are the same. I can do 21x184 HT on @ 1.2v but i need 1.33v to pass linx at 21x201 HT on.

[frag85]

I haven't done any extended OC'ing with HT on past 4.0ghz (190x21) because I use this system for gaming and the heat output was getting outrageous. IIRC at 190x21 i needed 1.28vcore with HT ON, where it only needs 1.22 w/ HT off. The QPI/Vtt also needed 1.42v w/ HT on to pass several days of stress testing, although it might have needed voltage elsewhere. I don't have the need for HT so I probably won't ever go back to testing with it on.

[Unrealer]

920 D0 3926A446
4Ghz (HT Off)
Thermalright 120 Ultra Extreme + 2x Aerocool Silverlightning @ 1300rpms
Vcore: 1.258v
VTT: 1.28v

SP2004: 9h (priority 10)

[DOM.]

i7 920 Batch # 3845B259 or 3844A953

[moopa]

i7 920 Batch #: 3927A516

[flesheatinvirus]

i7 920 batch 3849B041 on water using a GTZ block with a PA 120.3 rad and MCP655 pump. This is my 24/7 speed.

[DOM.]

i7 920 Batch # 3845B259 or 3844A953

which one should i buy ?

[flesheatinvirus]

Grab the 3845B259 as it should do pretty good. That is the start of the good steppings, 3845-3849.

[DOM.]

Grab the 3845B259 as it should do pretty good. That is the start of the good steppings, 3845-3849.

will its sold wut about the 3945A854 ? any good ?

[flesheatinvirus]

I honestly do not know about that one though most can do 4G pretty easy with the right combination of hardware. If the price is good pull the trigger I think you will be happy.

[DOM.]

I honestly do not know about that one though most can do 4G pretty easy with the right combination of hardware. If the price is good pull the trigger I think you will be happy.

will should find out thursday it gets here but ill be at work so friday ill get to hook it up, idk if i should try water or phase 1st thinking water just to make sure everythings working lol

this is wut else i got Enzotech SCW-REV.A CPU Waterblock, ASUS P6X58D Premium, G.SKILL Trident 6GB (3 x 2GB) DDR3 2000

[flesheatinvirus]

Cool hardware setup that should work out real nice, Enzotech make some nice stuff. I too would start with water just to iron out the bugs then phase it after you figure out a 24/7 and bench speed setting. Gskill Trident is going to love that setup. I am running there F3-17066 6GB set on this P6T and they can do 2245 with some juice or 1720mhz at 6-7-7-22 at 1.64v. Some really nice sticks for sure.

[ElAguila]

I7 920 Batch 3945A781 4.2GHz 1.28vcore with air cooling

[melnd]

3938b020, megahalems pushpull, 4.2ghz 1.192v HT OFF, HT ON 1.208V , 24/7 stable

[zalbard]

3938b020

http://i749.photobucket.com/albums/x...nip/608259.png

The link is broken it seems.

[=[PULSAR]=]

Haven't messed around with my i7 lately what seems to be the max QPI people are getting?

[nkresho]

Finally got my hands on one of the "coveted" 920's , Batch 3845B259. While it is a bit better than my W3520 was, it's not earth-shatteringly so.

Notes in pics give voltages.
4200mhz


4300mhz


4400mhz (sry, forgot to show memory timings in CPU-Z.)


Still working for 4500 with HT on. Voltages are starting to make me a little nervous though.

[flesheatinvirus]

I am happy with my 3849B041, just getting started.

[CryptiK]

SPI32M






3DM05

[SmokeyTheBandit]

I got hold of a retail i7 930 today wich will be in my hands tomorrow
I can already give the batch : 3001A117

Results soon

[nkresho]

Very nice Smokey. Looking forward to your results.

[scgt1]

I got hold of a retail i7 930 today wich will be in my hands tomorrow
I can already give the batch : 3001A117

Results soon

How the hell did you do that?