Core i7 Overclocking by Batch #

[MisterMagoo]

Aqua computer cuplex di on the cpu, bitspower on the pwm and nb. Feser quad rad.

[jVIDIA]

Mr. Magoo, update my vCore if you please :

3838B079
21x191
1.26250v in Bios

http://www.xtremesystems.org/forums/...&postcount=317

[The Nemesis]

Gotcha, all good.

I will start to update at the end of the days, to keep it simple.

I guess u didn't see the part about all my voltages being reported +.05 in windows, and my measured voltage being 1.356v when reporting 1.408v @ 4GHz. My other entrys had actual values in that post too.

[MisterMagoo]

I guess u didn't see the part about all my voltages being reported +.05 in windows, and my measured voltage being 1.356v when reporting 1.408v @ 4GHz. My other entrys had actual values in that post too.

I am sorry, so to clarify it is 1.356v?

jVIDIA I will update as soon as I get Nemesis's info right.

Edit: Also wondering if you all would like a column for "24/7 OC"? IE Yes or No depending on if you flag it as your 24/7 OC or your highest stable.

[The Nemesis]

I am sorry, so to clarify it is 1.356v?

jVIDIA I will update as soon as I get Nemesis's info right.

Edit: Also wondering if you all would like a column for "24/7 OC"? IE Yes or No depending on if you flag it as your 24/7 OC or your highest stable.

Two of the corrections were mentioned here:

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.

The same 3837B317 3920MHz on air entry @ 1.35v is actually 1.31v measured. In a post I made here I converted the original spreadsheet to an image and it shows all my corrected values. The 4GHz OC I had switched to water (Swiftech Apogee GTZ).

When I use to make charts I always listed a stability column and placed the highest reported stability in that column i.e. 8-12Hrs prime, OCCT, 32 or 1 MB pi or 3DMark. For me if its not 8 or more hrs prime 95 stable it's just not stable.

[Mister2]

Batch Number: 3836B043
CPU Freq.: 3705 MHz
QPI: 3510 MHz
Multi: 19
LOAD vcore: 1.254
CPU VTT: 1.2625
Hyperthreading: ON
LOAD core temps: 86/85/84/81
Cooling: TT SpinQ



I'll get that sig updated sooner or later (I'm lazy so probably later).

[MisterMagoo]

Nice Make sure you post a screen and all that when you get it under water and we will get you on the list.

I am updating shortly just running some tests on my system so I can add myself.

[Eagleclaw]

As I am almost finished getting parts for my i7 build my Processor came today from newegg.

I wouldn't post this until I have results but it seems no one has posted this FPO before i7-920 "3841A573" (Ver# E51453-002 Pack Date 1/14/09 Made in Costa rica)

Sorry I won't have results until late next week

[MisterMagoo]

I have that batch currently. It takes quite a few more volts for 4.2Ghz with HT than the earlier 3841A's to be 50 pass linx all memory stable.

[Eagleclaw]

Thanks for the reply, I am sure you are running water?

I will be trying an Scythe MUGEN-2 first and see how far I can go. This will be a pure gaming machine so from what I have read having HT off may be best, is that correct?

Opps you don't have to answer that as this isn't really the appropriate thread

I have that batch currently. It takes quite a few more volts for 4.2Ghz with HT than the earlier 3841A's to be 50 pass linx all memory stable.

[jcool]

Some numbers on 2 920's I tried today guys, some of the better specimen I have had, all results with HT on:

#1: 3837B282
First I ran 200x19=3,8Ghz on water, 1,23V LinX stable didn't try lower, temps in the low 60's
Then I ran 200x20=4Ghz on phase, not its favourite mult, needed 1,46V to be stable, temp in the low 20's
Unfortunately it hated the 21x mult so I gave up on 200x21, not even 1,55V did it

--> good cool running CPU for air OCs, like most 920's it prefers the 19x mult, useless for chilled water or phase

#2: 3837A707:
First the 3,8Ghz at water test again, also passed with flying colours at 1,23V, again I didn't try lower, temps in the mid to high 60's
Then 4,2Ghz on water, turned radiator fans to max to keep water temp at 25C, passed 3 hours of prime blend at 1,42V temps in the low 70's.
So nice, this CPU likes the 21x mult, on to phase --> 210x21 LinX stable at 1,52V load, horrible mount tho temps went up to +40C, currently crunching WCG at 4,4 Ghz and +30C on all cores



Oh yeah, and I had another one this week, another 3837B282:

Only tried undervolting on that one, running 3,4Ghz at 1,08V stable on air

[NCspecV81]

3837A945 - i7 965 from newegg purchased last Friday.

Stock cooler - 4.638ghz

http://valid.canardpc.com/show_oc.php?id=505594

[jcool]

Max screen runs on a stock cooler? Feel like frying your CPU much?

[NCspecV81]

Max screen runs on a stock cooler? Feel like frying your CPU much?

hahah yeah.. 1.5v though so NOT that bad.

[jcool]

Pretty nice mhz for 1,5V.. I just saw that you disabled everything anyway so heat wouldn't be the issue with just 1 core

[FabricioGS]

Can you please remove my previous post and use this please?

100MHz less but .150v less too (and it's way much more stable)

920 @ 3.9GHz #3836A394

http://valid.canardpc.com/show_oc.php?id=505712

[loonym]

3842A334
lp-ut, gskill pk, TRUE push/pull
19x206
DMM measured volts:
VCORE 1.322v
VTT 1.334v
vDIMM 1.600v
vPLL 1.835v
vIOH 1.170v

[Avan]

3842A334
lp-ut, gskill pk
19x206
DMM measured volts:
VCORE 1.322v
VTT 1.334v
vDIMM 1.600v
vPLL 1.835v
vIOH 1.170v

Nice clock, I think that's the first week 42 chip that's been posted here.

[loonym]

Nice clock, I think that's the first week 42 chip that's been posted here.

Thanks. Yeah, that's why I wanted to make sure and get it on the list. I have a couple others from different weeks to post soon too.

[road-runner]

3841A371 water cooling.

[MisterMagoo]

Ok I am updating the spreadsheet. May I make a suggestion?

I say we need to have at least one small standard. How about 1 hour of your favorite stability app? OCCT/Prime/linx/IBT whatever floats your boat. That way someone does not see 4.5ghz batch runs out to get it only to find out it only runs 3.8 with HT stable? Just a thought, let me know what you think.

[headala]

Ok I am updating the spreadsheet. May I make a suggestion?

I say we need to have at least one small standard. How about 1 hour of your favorite stability app? OCCT/Prime/linx/IBT whatever floats your boat. That way someone does not see 4.5ghz batch runs out to get it only to find out it only runs 3.8 with HT stable? Just a thought, let me know what you think.

+1

[anzial]

You can also add a column for the number of oc testing hours hours

[MisterMagoo]

You can also add a column for the number of oc testing hours hours

Good idea, I will add that also.

[The Nemesis]

Yeah a real stability test is really needed otherwise I want this as my entry