Core i7 Overclocking by Batch #

[jcniest5]

Not posting complete specs until I can get a Prime screenshot (can't leave running that long on the stock cooler). 3844a361 booted and ran spi 19x211 1.2v but prime failed. Seems fine on 1.225v though Not bad for air even if I had to go to 1.25!

What mobo are you using? Does your CPU defaults to 1.08V Vcore as well when you leave everything at stock? Mine does...but my brother's defaults to 1.16V Vcore when everything is left at Auto (stock) and his is 3842A594 (vs. mine is the same as yours). I think the latest batch defaults to a lower Vcore when everything is set to Auto. It would be interesting to know IF the latest batch really defaults to a lower Vcore or if mine is the only one.

[ewitte]

What mobo are you using? Does your CPU defaults to 1.08V Vcore as well when you leave everything at stock? Mine does...but my brother's defaults to 1.16V Vcore when everything is left at Auto (stock) and his is 3842A594 (vs. mine is the same as yours). I think the latest batch defaults to a lower Vcore when everything is set to Auto. It would be interesting to know IF the latest batch really defaults to a lower Vcore or if mine is the only one.

p6t deluxe. Yes it says 1.08v in BIOS on auto. Right now until I get better cooling its actually looking stable 2.67Ghz .95v BIOS (.944v shows CPU-z with 8 cores going in prime).

http://s150233688.onlinehome.us/primeLowVolts.jpg

[jcniest5]

p6t deluxe. Yes it says 1.08v in BIOS on auto. Right now until I get better cooling its actually looking stable 2.67Ghz .95v BIOS (.944v shows CPU-z with 8 cores going in prime).

http://s150233688.onlinehome.us/primeLowVolts.jpg

Not sure if it makes any difference if I use a different mobo than yours (Asus P6T Deluxe vs. MSI X58 Platinum SLI) but I might try the .950V VCore as well to see if it's stable. It would be cool IF I can get it to run with that low VCore. It would stay pretty cool. What kind of temp do you get with that low VCore?

[ewitte]

Not sure if it makes any difference if I use a different mobo than yours (Asus P6T Deluxe vs. MSI X58 Platinum SLI) but I might try the .950V VCore as well to see if it's stable. It would be cool IF I can get it to run with that low VCore. It would stay pretty cool. What kind of temp do you get with that low VCore?

Its still getting in the 70's under prime. This intel HSF is sucking. Those push pins are not holding it very good against the heat spreader. Its barely touching and I had to apply thermal compound to both sides just for that or the gap is too much. Its definately getting better cooling ASAP.

[jcniest5]

Its still getting in the 70's under prime. This intel HSF is sucking. Those push pins are not holding it very good against the heat spreader. Its barely touching and I had to apply thermal compound to both sides just for that or the gap is too much. Its definately getting better cooling ASAP.

Yeah, the stock cooler sucks. I have an Ultra 120 Extreme and even that still doesn't quite cool it properly.

[ewitte]

Yeah, the stock cooler sucks. I have an Ultra 120 Extreme and even that still doesn't quite cool it properly.

Shouldn't be too hard to find something to handle 4Ghz @ 1.225 which looks like what my 24/7 will be

[jcniest5]

What memory do you have anyway? My memory sucks...I should get 1600Mhz memory but the price just went up about $40 within the last few days. Is there something going on with memory chip makers?

[ewitte]

6GB OCZ 1333 7-7-7-20. BTW I just got a Hyper N520 for the CPU. Needed something to fit in my Cosmos S with the fan on and I'm not going crazy on the volts anyway.

[ewitte]

My mild OC low volts results. Still hot but much better than the stock HSF.

http://s150233688.onlinehome.us/prime36lv.jpg

3844a361
i920 Asus p6t deluxe

cpu in BIOS - 1.085v
qpi 1.35v
mem 1.66v
HT on
C1E on (to keep idle temps low)
CState on (to keep idle temps low)
Memory OCZ 1333 7-7-7-20 running same timings at 1524.

Coolermaster Hyper N520

Seems with the temps under control this chip will do
2.67Ghz - 0.95v
3.6Ghz - 1.085v
3.8Ghz - 1.135v
4.0Ghz - 1.225v

[hlonipha]

My mild OC low volts results. Still hot but much better than the stock HSF.

http://s150233688.onlinehome.us/prime36lv.jpg

3844a361
i920 Asus p6t deluxe

cpu in BIOS - 1.085v
qpi 1.35v
mem 1.66v
HT on
C1E on (to keep idle temps low)
CState on (to keep idle temps low)
Memory OCZ 1333 7-7-7-20 running same timings at 1524.

Coolermaster Hyper N520

Seems with the temps under control this chip will do
2.67Ghz - 0.95v
3.6Ghz - 1.085v
3.8Ghz - 1.135v
4.0Ghz - 1.225v

Ummmm, might want to leave p95 run a little bit longer than 15 mins to even think temps are under control. 8K does not load the cores at all.

[ewitte]

Ummmm, might want to leave p95 run a little bit longer than 15 mins to even think temps are under control. 8K does not load the cores at all.

Didn't have much time and have kinda been taking it a little easy as you see they are still in the 80's. Hoping the TIM settles and gives me slightly lower temps as well. Trying to decide if I want to go ahead and upgrade the HSF again or start the design phase for watercooling.

EDIT: I'm going to play around with the fans from a few diagrams I saw on the watercooling forum. One suggestion there may help a lot because when I had the q9550 the temps DID go up like 10C when I installed the GTX 295. If I can get fresh air out from the top the situation may be a lot better.

[Nemaster203]

Batch: 3837B290



I have no real need for Hyperthreading, so I turned it off.
Full specs:
Processor: Core i7 920
Motherboard: ASUS P6T WS Professional
Memory: OCZ 1600MHz 7-7-7-20-1T 6GB DDR3
Graphics Card: ASUS EN8800GT
PSU: OCZ GameXStream 700W
Cooling: Zalman Reserator 1 Plus (Koolance CPU 350 Waterblock, Zalman GPU and GPU-RAM water blocks in the same loop) With a pump mod (D-Tek DB-1 Pump).

I haven't tried for a higher overclock than this, because the Reserator compounds the heat, which makes it get worse as time goes on.

The Batch Number's above the picture.

EDIT: I know I didn't leave Prime 95 running for long in that picture, but I had it running for at least a few hours when I first started overclocking it. I don't often run my i7 at that OC because of the heat compounding issue with the Reserator. I let it run as long as I felt safe to let it run at the temps it was getting to (the first time I ran Prime95 for a few hours).

[ewitte]

I haven't tried for a higher overclock than this, because the Reserator compounds the heat, which makes it get worse as time goes on.

Handle it good at those settings? Kinda looking at the reserator XT. Though I only have to deal with 1.225v for 4Ghz. Or just spending the next 2 months trying to pick out parts. Thing is I prefer it to look more professional.

[Viss]

Welcome to XS Nemaster203. Seems like you found yourself a nice chip. Im rather sure it wil do 4ghz with HTT disabled at lower vcore

[ewitte]

Oh sweet until I get better cooling (or fix what I have) it looks like 4Ghz doesn't totally thermally crap out with HT off. With C1E and CState on it drops into the 40's when idle as well.

[Hooti3]

Well i have been doing some Prime95 and LinX testing of my running setup..

Found a nice place of stability after about 50 passes of Linx and a couple of hours of Prime95...i would say it's considerably stable

Specs

i7 920 @ 4.0Ghz 1.3625V Bios (1.399V Load Windows) 191x21 w/ HT on. #Batch 3839A613
3 x 1GB 1600Mhz G.Skill @ 1.6V
EVGA X58 w/ SZ21 Bios
W/C loop made up of the Swiftech Apex ultima Kit.

Bios Template

i7-920@4.0GHz

Mother Board ( EVGA X58 X3 SLI )
Drivers ( 9.1.0.1013 )
Bios ( SZ21 )
CPU ( 920 )
CPU Cooler ( Swiftech Apex Ultima )
Memory ( G.Skill 1600Mhz 9-9-9-24 NQ )
PSU ( Antec TPQ 1000W )
GPU ( Powercolor HD4870X2 )
Drivers ( 182.08 )
Operating System ( XP Pro )


Frequency Control
CPU Clock Ratio ( 19X ) ( x21 With Turbo Enabled)
CPU Host Frequency (Mhz) ( 191 )
MCH Strap ( 1333Mhz )
CPU Uncore Frequency (Mhz) ( 16X )
Spread Spectrum ( Disabled )
PCIE Frequency (Mhz) ( 100 )


Memory Feature
Memory SPD ( XMP )
Memory Control Setting ( Enabled )
Memory Frequency ( 2:8 )
Channel Interleave Setting ( 6 Way )
Rank Interleave Setting ( 4 Way )
Memory Low Gap ( Auto )
tCL Setting ( 9 )
tRCD Setting ( 9 )
tRP Setting ( 9 )
tRAS Setting ( 21 )
tRFC Setting ( 70 )
Command Rate ( 1T )


Voltage Control
EVGA VDroop Control ( With VDroop )
CPU VCore ( 1.3625 ) 1.376V On idle, 1.399V Load
CPU VTT Voltage ( +225 )
CPU PLL VCore (Auto )
DIMM Voltage ( 1.600 )
DIMM DQ Vref ( +0 )
QPI PLL VCore ( 1.325 )
IOH VCore ( 1.2 )
IOH/ICH I/O Voltage ( 1.55 )
ICH VCore ( 1.10 )
PWM Frequency ( 933 )


CPU Feature
Intel SpeedStep ( Disabled )
Turbo Mode Function ( Enabled )
CxE Function ( Disabled )
Execute Disable Bit ( Disabled )
Virtualization Technology ( Disabled )
Intel HT Technology ( Enabled )

Active Processor Cores ( All )
QPI Control Settings ( Enabled )
QPI Link Fast Mode ( Enabled )
QPI Frequency Selection ( 4.800 )

Temps

Well considering it's summer in Aus. Temps are quite brilliant

Note: Rad has 2 x 2000rpm Scythe Ultra Kazes (Pull) + 2 CM 90CFM Fans (Push) (All on medium speed via Fan controller) + OCZ Freezer Xtreme TIM.

Idle: Core 1 - 39 , Core 2 - 35 , Core 3 - 38, Core 4 - 35
Load: Core 1 - 66-68 , Core 2 - 63 , Core 3 - 65, Core 4 - 66

Vreg Temps at full load are 63 (w/ 60mm fan on Vreg)
System Temps at full load are 33

I think i have found my new 24-7 Clock

What do you guys think?

Look decent enough?

[Rammsteiner]

Ill get back with results later, just got my first i7 parts today, batch is 3841A522. I cant find anything apart from something Spanish about this batch

[dejanh]

what do letters and digits in batch stand for?
and what the relevance between batch and born date? for ex, mine 3841A579 has pack date 01/26/09

Here is how 3841A579 breaks down...

3 - factory
8 - year (2008)
41 - week in year (week 41 in year 2008)
A579 - lot number

[Nemaster203]

Handle it good at those settings? Kinda looking at the reserator XT. Though I only have to deal with 1.225v for 4Ghz. Or just spending the next 2 months trying to pick out parts. Thing is I prefer it to look more professional.

All the Reserators except the Reserator XT are passive cooled; basically just a giant reservoir with fins on it. The Reserator XT is a hybrid of the passive Reserator design, and more traditional Active Radiator cooling. I believe the Reserator XT actually has 2 radiators built-in to it, with a small reservoir in one end. As I've said, the passive Reserators compound heat, unless you place them in a cold area or an air-conditioning duct. I have the fankit for my Reserator, but it still compounds heat. The XT will probably work nice though, since it's made for both passive and active cooling.
For those that don't know what a Reserator is, it's a Reservoir, a Radiator, and a Pump combined into one unit, which makes it a Reserator.

Welcome to XS Nemaster203. Seems like you found yourself a nice chip. Im rather sure it wil do 4ghz with HTT disabled at lower vcore

Thanks. I can't get my Core i7 to run stable at lower voltages than this, but I'm still fairly new to overclocking. I'm only changing the memory ratio, bclk, and the Vcore, so there's probably something else I could do that I don't know about to get it higher, everything else is on auto.

P.S.- My motherboard won't let me change any multipliers/ratios except the CPU Multiplier and the Memory Multiplier (no Uncore or QPI ratios or multipliers). I only get 3 options at what I want the QPI to run at, in MT/s. The Uncore automatically changes depending on my Memory Multiplier.

[Hazzan]

i920 3838A505 HT on TURBO off
Processor: Core i7 920
THERMALRIGHT COOPER 120XTREME + FAN ULTRA KAZE
Motherboard: ASUS RAMAPGE II XTREME
Memory: GSKILL 6G KIT GBHK 8-8-8-18 1T 1.6 VOLT
Graphics Card: ASUS ENTGX 295
PSU: ANTEC SIGNATURE 850 WATT

[diablos]

3842a951
someone know somethink about this batch?

thanks

[ChaosAD]

I have ab 3842A atm I just found that i can trade it with an 3836B124. Do u think i should go for it?

[diablos]

I have ab 3842A atm I just found that i can trade it with an 3836B124. Do u think i should go for it?

but How is your actually 3842A?

[ChaosAD]

but How is your actually 3842A?

I wish i knew. I havent opened it yet. If i open it i cant make the trade at the shop

[ChaosAD]

Ok, i decided to stay with the 3842A. And just bought a shinny new DFI T3eH8. Currently running all stock volt at 21x150. I check the max stable with stock volt 1st cause i run at intel air cooling. Lets see.