Core i7 Overclocking by Batch #

[cardnut99668]

Thanks for the input. I'm going to try and push things more as the weekend approaches. I'm hoping I can hit 4.3. We'll see.

[vegasr]

Total bummer. 3841A505 took me up to 3.6Ghz on stock voltage AND cooling. Goes further then that as well, but temps break into the lower 70's under load at that point so I give up there and stay with 3.6 for now.

I picked up a 3841A507 from Frys the other day. So far so good. Looking forward to seeing how it will do above 4.0

[Pisklink]

I guess you do, which is pretty weird, since I set the option to let anyone edit without signing in...

You correct that everyone can edit the file. I just noticed that it actually save automatically while I thought I had to go to "file" en press "save". So this is nog the case, just put in your settings and your fine.

Btw what voltage do you guys report in the spreadsheet, bios, idle or load?

[moshpit]

I picked up a 3841A507 from Frys the other day. So far so good. Looking forward to seeing how it will do above 4.0

Hehe, that's where I got mine as well. Seems they have some good ones up there right now

[Astratuner]

I picked up a 3841A507 from Frys the other day. So far so good. Looking forward to seeing how it will do above 4.0

I've got a 3841A628

Waiting on my Watercooling parts + my vga card is fubar so I'm kinda delayed.

Let me know how much you can push yours vegasr!

[jcniest5]

I've got a 3841A628

Waiting on my Watercooling parts + my vga card is fubar so I'm kinda delayed.

Let me know how much you can push yours vegasr!

Report back quick! I need to jump on some batch with all reports people are giving...Mine isn't doing too good. It needs at least 1.4000V to be stable for anything 3.8Ghz - 4.2Ghz. The 505 above looks good with only 1.224V, something mine could never do.

[moshpit]

Report back quick! I need to jump on some batch with all reports people are giving...Mine isn't doing too good. It needs at least 1.4000V to be stable for anything 3.8Ghz - 4.2Ghz. The 505 above looks good with only 1.224V, something mine could never do.

I've actually dropped my vcore since last I posted. Now running 3.6Ghz on 1.21 vcore set in bios, 1.15 shown in Windows under load. Managed to shed another couple of degrees under load for my effort. I'm now only .02 volt above VID, next goal is to drop it to VID level and see if I can IBT with that low of voltage stable.

[Avan]

I've actually dropped my vcore since last I posted. Now running 3.6Ghz on 1.21 vcore set in bios, 1.15 shown in Windows under load. Managed to shed another couple of degrees under load for my effort. I'm now only .02 volt above VID, next goal is to drop it to VID level and see if I can IBT with that low of voltage stable.

Just wondering, is that with HT on or off? Either way, impressive voltage.

[moshpit]

Just wondering, is that with HT on or off? Either way, impressive voltage.

HT on, Turbo off. HT on is a must or I've reached my OC/voltage limit as far as I'm concerned. If I have to turn the HT off to get voltage down or clocks higher, then I've gone too far. That's a feature I'm just not willing to give up :p

I should add that in over a decade of being a tech, I've never owned an HT capable chip, and until i7 came out never cared. Now HT is actually kinda cool. It's not a bandaid for a broken architecture, it's actually a useful feature. Giving that up just to get a higher OC or lower voltage would be like chopping off one of my hands now.

[gonx_me]

Can you post your configuration? I also have the same CPU batch, mas i can even post with more than 175Mhz QPI. But i'm on a EVGA X58.

Ok, the best i can is 19x200 @ 1.28v core and 1.28 qpi voltage. Everything else is auto.

Is there any way to get lower vcores? I mean, with what settings can i compensate a lower vcore? I see people getting 3.8 with vcore values lower than 1.28 but at the same time i'm really noob at Oc'ing so i don't know what settings to change in order to compensate lower vcore values.

My Batch # 3839A569 and i'm using a P6T Deluxe with latest bios ( 1102 ) and 6Gb of Dominators 1600 (C8 ).

[cardnut99668]

I updated my version of real temp and my max temps went up. I think I need to remount the HS.

[Chicken Patty]

I updated my version of real temp and my max temps went up. I think I need to remount the HS.

When I got your version 2.90 my temps went up too!


Download the latest one below, my temps actually dropped a bit more with version 3.00

http://www.techpowerup.com/downloads...Temp_3.00.html

[headala]

Does anyone have any data on their 920's max bclk at the stock voltage?

[Nilos]

Yesterday i tested a 3842A938 pack date 15/01/2009

total crap and the worst i ever tested 4GHZ required 1.45v

so you are warned...

[jcotran]

3839A589

Still tweaking my 24/7 setup...

[moshpit]

Does anyone have any data on their 920's max bclk at the stock voltage?

So far, my max bclock at stock voltage is 180mhz. I haven't pushed it further then that yet. It may go further.

[jVIDIA]

My 3838B079 24/7 setup :

[posershadow]

Ran stable through linx 20 runs. 208bclk, ht off, vcore at 1.38v in bios and all others auto. 8-8-8-24-1t ram timings. Maxed around 66C during linpack, under water. Now if only I could afford a ss and some dominator gt... Batch number is 3838A557. Ordered from tigerdirect.

http://valid.canardpc.com/show_oc.php?id=501042

[The Nemesis]

I recently discovered that my voltage readings in windows were all incorrect and were over by aound .05v for each reading seen in smart guardian as well as cpuz in windows. So I need to update my overclock voltages on my two chips.

i7 920 3837B317
DFI DFI LanParty UT X58
BFG 280TX SLI
3GB Corsair Dominator TR3X3G1866C9DF
Creative Sound Blaster Live Platnium
Tagan /\+ CS Black Pearl WCR
Antec TruePower Quattro 1000w
Swiftech's Apogee GTZ
Laing DDC-2 w/ Petra'sTech DDCT-01s Top
Thermochill PA120.2
Dell UltraSharp 2407WFP
Logitech Z680's, Logitech G15, Razor Copperhead

4GHz Overclock
1.35v bios 1.408v idle & load windows 1.365v idle 1.356v load measured
cpu vtt/Qpi 1.28 bios 1.31v windows 1.26v idle 1.275v load measured


Also the i7 920 3838A824 entry was measured at 1.28v load & 1.243v cpu vtt/QPI for the the 3.8GHz on air instead of 1.32v 1.29v cpu vtt qpi.

[Astratuner]

Report back quick! I need to jump on some batch with all reports people are giving...Mine isn't doing too good. It needs at least 1.4000V to be stable for anything 3.8Ghz - 4.2Ghz. The 505 above looks good with only 1.224V, something mine could never do.

Ok mate no problem but I could take some weeks

[eva2000]

Got identical batch i7 920s = 2x i7 920 3836A756 interesting comparison especially how they handle CPU VTT and max bclk!

*** Prime95 ***

i7 920 3836A756 #1

• @3815Mhz at 1.232v HT enabled 4+ hrs (my 24/7)
• @4009Mhz at 1.328-1.344 HT enabled 1+ hr (my video encoding config)

i7 920 3836A756 #2

• @3815Mhz at 1.264v HT enabled ~40mins before system reboot (didn't test further)

*** Max Super Pi 32M ***

Both cpus have similar max HT enabled 32M Pi ceiling of under 4500Mhz. HT needs to be disabled for greater than > 4500Mhz on air cooling.

i7 920 3836A756 #1

• @4300Mhz HT enabled at 1.488v
• @4410Mhz HT Enabled at 1.520v
• @4554Mhz HT Disabled at 1.552v
• @4610Mhz HT Disabled at 1.600v
• @4652Mhz HT Disabled at 1.616v

i7 920 3836A756 #2

• @4359Mhz HT enabled at 1.456v
• @4468Mhz HT enabled at 1.488v
• @4536Mhz HT Disabled at 1.536v

*** Max BClock ***
Definitely this second i7 920 3836A756 is better than my first one in terms of max Bclock and low CPU VTT usage.

i7 920 3836A756 #1

• max memtest86+ bootable bclk = 224 requiring 1.58-1.60v CPU VTT
• max super pi 32m bclk = 222bclk (without IOH/ICH voltage tweaks) & 228bclk (with IOH/ICH voltage tweaks) requiring 1.60-1.61v CPU VTT
• max CPUZ Validation = 230bclk requiring 1.60-1.63v CPU VTT

i7 920 3836A756 #2

• max memtest86+ bootable bclk = 229bclk requiring 1.40-1.48v CPU VTT
• max super pi 32m bclk = 227bclk (without IOH/ICH voltage tweaks) & ???bclk (with IOH/ICH voltage tweaks TBD) requiring 1.48-1.50v CPU VTT
• max CPUZ Validation = 231bclk requiring 1.50v CPU VTT

TBD - Haven't tested 2nd cpu with IOH/ICH tweaks yet

System specs

• 2x i7 920 3836A756 #1 and #2
• Thermalright Ultra 120 Extreme + LGA1366 Bolt Thru kit + 2x 120x38mm Scythe UltraKaze 2000rpm 87cfm fans in push/pull
• DFI LP UT X58-T3EH8 R.A51 - 01/23 beta bios
• 1KW Corsair HX1000 psu
• WinXP Pro SP3 full nLite updated hotfixes / Windows 7 beta dual boot

[cky2k6]

guess some people are too stupid for this to work... i could require login, but then it wouldn't let people edit who don't have a google account, and some who mess the sheet up are google members too... long story short, you guys can keep posting, but there won't be any updates to the list on the front page.

[loonym]

guess some people are too stupid for this to work... i could require login, but then it wouldn't let people edit who don't have a google account, and some who mess the sheet up are google members too... long story short, you guys can keep posting, but there won't be any updates to the list on the front page.

The list on the front page is unsearchable anyway because you posted it as an image instead of a list. Good thread, keep posting those batch numbers everyone.

[The Nemesis]

It's so easy to correct or update the list, why no more updates on front page???

[MisterMagoo]

Great thread, but if no front page updates someone else should take this over. People looking for the best batch are going to have to sift through 10's and 20's of pages rather than just going down a list..."Hey! That 3836 is a good batch, ::goes to microcenter::" Jmo...