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am I mistaken or does the asus p6t-d board with 1003 BIOS only allow CPU down to 1.25v
I can run stable at that it seems and would like to try lower......
I gave up on 4Ghz.
Currently running at 3906Mhz (186x21) with vCore @ 1.35v, PLL @ 1.8v, QPI @ 1.2v and all others at minimum.
Won't do 4Ghz stable even at 1.42v and that already makes my CPU go over 85C
raising PLL or QPI won't help me bring vCore down.
try the 19x multi. i needed 1.4 vcore at 200x20 to even get into windows. with the 19x multi i am at 211x19 and only needing 1.32
My Gigabyte EX58-Extreme won't run 211x19 for nothin. I've been testing it out since others seem to be having luck on the 19x multi but it doesn't seem to work for me. I leave the vcore set to 1.4v along with playing with all the other voltages and it locks up the second I start Prime95. It doesn't BSOD though like it usually does when I'm testing with the 20x multi due to low vcore. So I don't know if my board just isn't capable of 211 blk or maybe it could be my memory or my 920 just won't cut it. It could have a weak memory controller I suppose. I have the Corsair 1600C8 Dominators so I would think they could handle 1688Mhz. I bumped their voltage up to 1.75v and still no fly.
Just finished 24 hours of Prime @ 3.4 GHz :D
20x170:
vCore - 1.225v in BIOS (1.216v Load)
QPI/VTT - 1.25v
vDimm - 1.63v
Speedstep, HT, and Turbo are all off.
Pretty happy with it, please let me know if you guys think any of the settings can be improved.
http://i143.photobucket.com/albums/r...rimestable.jpg
This might be the best this 965 can do with HT off - on water - I would have liked to have gotten 4.5 but as a consolation I am please with the temps. I plan to try some x23 multi's next.
How much VTT (VTT/QPI voltage in gigabyte bios) have you tried? That's the one voltage that matters for max BCLK, also maybe CPU PLL.
If prime blend freezes the VTT is too low. Depending on the CPU, amount and speed of memory and the quality of the IMC you'll need between 1,4 to 1,6V VTT to run 211x19 stable. Personally I wouldn't go past 1,5-1,55V VTT 24/7 though, at least not on air.
Stevero, nice CPU and great temps for that voltage. How much do you need for 4,4Ghz with HT?
For testing, just lower the Memory Multi to 6x and Uncore Multi to 15x. This will allow you to eliminate that the memory could be your problem.
What qpi/vtt are you running? My chip requires a LOT to hit 211bclk. Like 1.79 which is way too much for my liking.
I got a line on some retail 920's from batch# 3837B317 and 3837B215. Anyone have and bench time with these yet?
edit: also 3836B043.
My new result running at 4.2GHz with Uncore:QPI 1:1 3.6GHz each. Lower voltages on the core too, by about 0.032V from before using new R2E 0904 beta BIOS from Asus...all on air.
QPI/DRAM and DRAM voltages are the same as in all of my other runs, 1.35000V and 1.65681V respectively. CPU voltage is set to 1.39375V in the BIOS. C-states are on, hence the lower post-run clock visible in RealTemp.
Not bad :up:
heres my latest 100% stable results. I can lower core voltage down slightly but am not able to run 100 pass of dual linx passes simulatneously with prime blend.
Stability is important to me and happy to run the few extra mV to accomplish this.
i920 'A' batch - not particularly kind one either, Asus p6t-D, Thermalright 120 push only Sythe fan, corsair 620HX PSU, Win Vista 64bit
6GB Corsair Dominator 1600 ram @ 7-8-7-7-20
Bios settings.
CPU 1.325v (.125v in CPUZ in windows under full system load)
QPI 1.29365v
Ram 1.66v
PLL 1.92v
IOH 1.24v
Load line calibration = off (only way to go lower than 1.3v at run time under load to drop temps)
Will try to push to 19*210 next, now Ive found the stable settings for 3.8Ghz
http://farm4.static.flickr.com/3314/...1e2c4474_b.jpg
Edit some notes I found applicable when tuning this system, your systems may vary.
BSOD in Prime were almost always results of not enough core voltage.
Linx memory errors were almost always fixed with increase of QPI voltage
Im sure RAM volts can be dropped fairly significantly too but as not even warm, no big deal - will fine tune going forward.
Arguably, I found Stability was dependant on the ratio of QPi and vcore. To high a vcore with too low a qpi (or vice versa didnt help stability).
Too much voltage decreased stability noticeably (1.4 core + 1.35 QPI is less stable than this lower power system according to my notes)
I found I could dual run two Linx passes with 20 passes and be stable but not be 1 hour prime95 stable - a mixture of the two was a requirement.
Simultaneous testing with prime and dual Linx passes was the ultimate test. I was prime95 stable for many horus but adding Linx brought system crashing down very quickly.
I still dont see the same performance as Dejanh above with just two Linx passes with same parameters and same memory & cpu clocking. possibly something going on in the background of my lightly tuned Vista system? needs investigation....
Fudzilla just posted this - http://www.fudzilla.com/index.php?op...1407&Itemid=66
Anyone with a 965 under water tried this yet? Its on my list!
Batch number 3838A646
Anyone else got this batch?
wondering what kind of volts required for 4.0Ghz stable w/ HT
@viking, nice results. Ive never had prime fail within an hour after being atleast 20x linX stable that very strange
It does for finding vCore I agree. But I just passed LinX x 20 with 6 gigs with max memory used at 1.375 VTT and blue screened Prime blend after maybe 15-20 mins. I'm up to over an hour now on blend with 1.395 VTT.
http://img220.imageshack.us/my.php?i...184v1ptpc9.jpg
http://valid.canardpc.com/show_oc.php?id=485169
Im curious to see how that 3836B043 performs, because I just got that chip also. I am only using intel stock cooler for now though. Havent tried clocking it yet as my windows install is all shot to hell...yay! so, will post back with results soon as windows workin again. Try out the 3836B if ya want =) Im curious to see what people can get on high end air cooling out of these.
GenTarkin, you got to test this batch man, according to my expectation it should be a bombastic one :D
Just try some max bClk with low multi and max on Stock cooler is a good indication too.
I am very close to pull the trigger on that stepping and I would really like to know how well it performs.
This doesn't answer the A/B thing, but here is how to read a batch number.
Code:Example: L707A723 ---
1st letter or digit = plant code: (Malaysia)
0 = San Jose, Costa Rica
1 = Cavite, Philippines
3 = Costa Rica
6 = Chandler, Arizona
7 = Philippines
8 = Leixlip, Ireland
9 = Penang, Malaysia
L = Malaysia
Q = Malaysia
R = Manila, Philippines
Y = Leixlip, Ireland
2nd digit = Year of production: (2007)
3rd & 4th digits = week: (7th week )
5th - 8th digits= lot number: (723)
10th - 13th digits = serialization code (---)
I believe that was the same kind of information that I had, but I think mine was using the i7 numbers as the example. The A/B### identifies the lot. I am personally not sure that there is anything particularly different about A vs. B lot chips as my replacement from Intel which is an A lot chip is pretty good when it can do 4.2GHz with HT on using only 1.38V - 1.39V on pure air (it would likely be lower on water or better as I can right now lower volts if I toss the computer out onto the balcony :p:). I think it is a week 36 chip for me, but I posted this in the Batch # thread.
Prime stable = prime stable.
real world stability = real world stability.
How is that over-simplifying? Seems perfectly legitimate in theory and execution. If prime actually did something other than set off premature electro-migration then I'd be all for it.
I use Linx to shut people up and it's fast :)
Avan, you posted it yourself. Intel codes their chips the same across the board. Digits 5 - 8 identify the lot.
So an...
3836A950 chip would be Costa Rica, 2008, week 36, lot A950.
3836B950 chip would be Costa Rica, 2008, week 36, lot B950.
It could very well be that the two lots get filled by two different sources and it just happens that those sending chips to lot B happen to also be a bit more careful with them. But then again, some of the highest clock/lowest voltage chips have been from the (lot) A. Even my chip now, like I said before, does 4.2GHz with HT on at just 1.38V on air.
I guess I was just hoping for an official answer the difference between the two versions of the lots. It was pretty clear at first the B chips were the clear winners, but now the line between which lot version OCs better is beginning to blur. I just find it odd the B lots are a lot rarer than the A lots. Ah well, maybe we'll learn why some day.
You and a couple of the other guys are turning the term stable into something intangible that you can bend to your desires. Having no scientific standards doesn't make you more logical than those who insist upon them. Your standards are fine for you, but in a scientific community there is need to set a benchmark by which claims can be validated. Your comment of "to shut people up" is in itself quite revealing.
I don't want you to change your standards, I just want you to stop trying to lower others'. Thank you.
Which was my point: a properly run LinX x 20 isn't enough to ensure 24/7 full load stability. I am still increasing VTT chasing stability with triple channel under Prime blend. I am up to 1.4350 VTT at the moment. The system made it past an hour at the previous two VTT voltage settings in the bios and blue screened.
I am happy that I am getting LinX x 20 and 11 hour Prime blend stability at only 1.2750 VTT when using just dual channel memory. So far my Prime blend max temps have not increased at all from increasing VTT or adding the third memory module.
Who said Prime is a standard or the holy grail of stability especially when 100 people will tell you 100 different time frames that they call it stable. Then you have small fft, large fft and blend. Which one is the right one for i7? In reality, your system needs to be stable enough to run the applications that you run. Making anything a standard is impossible because of the rapid advancement in technology is 100x faster than the advancement of these worthless stability programs.
For anyone to argue against real world stability, that is revealing.
My "cohorts" as you coin them are unfortunately few and far between.
Gaming, Folding, Contiuous use of everyday programs without serious errors, OS Running Smoothly without corruption...you know, everyday use. Real programs that people actually use.
I went for it today, and got mine up to 4GHz Benchmark Stable. It was a piece of cake. Not gonna do overnight stability on it due to heat issues. I will be taking care of the heat with Watercooling so there is no real need to test for stability yet. Still playing with things, and will be for a good while. Below is the screen.
looks great T, what is your bios voltage? like 1.35?
Impressive T, love Fritz Chess. You ever try Arena? Now that is a grea real world stability test :)
Can't remember the exact number, but I input 1.35. It always ends up being 1.35xxx volts. It's the RIIE so whatever it goes to when you manually input 1.35 and hit enter. That's stock cooling now. Oh, and most of us already know this, but watch the dang heat with Stock Cooling. On stock cooling it's a completely diffeernt beast than on good air or water. Don't go too out of control on voltage on stock cooling and run programs that load for long periods of time without watching it and being right there with it. Some may throttle. Mine didn't on that run, but it was hair from it. They will throttle at 90.
I am NOT gonna do that all the time though. I might on water, but that's basically a "Showtime" run. I would not fold with that right now. I'll get water on it. I'm slow sometimes on stuff, but I will get watercooling on that system...that's a promise.
Yeah, but I'm almost scared to try it right now with stock cooling at that speed. :) I've already done 3.8GHz runs. Maybe after a couple of Jack Daniel's shots later I might get a wild hair and go for it. :D If that thing gets to 89 I'm gonna have to back out of it. I wanna be careful I don't hurt it until I get water on it. This CPU feels like a good one.
hehe Yeah, I know it's pushing it. Has anybody ran 4.2GHz on stock air yet? I'm just curious. If they did what were the temps? I don't think I can bench any higher than this on stock cooling.
I do think the chip has more in it with better cooling though. I would expect it to since it's a 965. I know this much, for what it cost, I could've bought the same weight in gold so I would hope it does. hehe :)
And with that I bow out of this divergent conversation confident that this statement alone has proven my point. Being a scientifically minded person (or so I'd like to think) I cannot accept this criteria as proof, as it is based more on coincidental data and emotional response than it is of a reproducible test scenario designed for our purpose.
That having been said, it's obvious that you folks who do clearly understand that the criteria is undefined, and you are comfortable with that. I cannot fault your choice, as it is your own to make.
Hoping that I have in the least raised food for thought, I apologize for the divergence.
I also agree with you too. I do use Stability testing. I just haven't yet on my new one. There are kinda 2 schools of thought on it. When I'm just messing with a system I don't worry about it, but once I really get a system setup for everyday use and rely on it I do use all kinds of different programs. I've used Prime95 overnight in the past as my staple for stability. Now, I would use Intel Burn Test, and maybe OCCT and Chess also along with games and Folding and pretty much everything.
I wouldn't ever run a system for mission critical stuff unless I was sure it was stable. None of them can be 100% stable. It's just not possible. Errors happen that we never see or know about even after one's been tested, but if they've been tested with alot of different programs it's a pretty good bet the system is stable *enough*. Obviously you can't gurantee that a machine will work 100% error free 100% of the time though.
if you need to be 40 hours prime stable for your computing needs, you probably shouldnt be OCing in the first place
Thanks for the great visual...I could've done without that. :ROTF:
It does take some scientiffic understanding to do this though. We do mess with electricity, and alot of test our PSU's, and check voltages, and we have to follow physics principals to do it. There is a bit of science to it.
I don't think it's running Prime blend long term that causes the crashes. Isn't it more likely specific tests that it's doing? I got crashes right after an hour in 3 times in a row now as I'm raising VTT and it's always on the same test.
My thing is, I'm asking the system to do pretty tight timings with a big increase in BCLK. There may be specific memory bus loads that consistently cause blue screens and I don't want my system to randomly crash because of my bad settings.
What kind of VTT are you guys running with triple 2 gig modules in the area of 8-8-8-21-1T @ 200 BCLK, 3200mhz Uncore or higher and 3600mhz QPI?
Unfortunately I've spent all of time so far on dual channel and I'm just now getting my ass around to triple channel so I have no frame of reference for common VTT requirements at a given OC yet. Time to dig through some screenshots and posts some more.
you sir are very welcome lol.
You know what I mean though. Overclocking 8 or 9 years ago called for allot of dinking around. Today, we have so many methods of data backup and recovery, with cheap massive storage, flash drives and imaging techniques the need for anal levels of stability just isn't as critical as it used to be.
Sorry to drive the subject into the ground, let's get back to the results :)
Bottom line is this...and I'm pretty sure I said this before too...
If stability is mission critical to you (a) you should not overclock and (b) you should not be buying off-the-shelf desktop chips
MRI Tech to Systems: "Hey, what are you guys doing here?"
Systems: "Dude, we totally overclocked your MRI scanner and it's 2x faster now! No need to thank us :woot:"
You'd never see that...
Yep, I can attest to that. Tape backups were good in their day, but they were painfully slow. Now, backups are not an issue.
I don;t mess with MRI's, but I do mess with Rcoket Data that is irreplaceable. I don't worry about my OC's becasue they are tested stable...stable enough that with my backups they don't matter.
Basically I do both. I do some mission critical stuff but small errors if I were to ever get any would not be an issue. Actually they wouldn't be an issue on an MRI either. They'd just do it over again. My Mother has actually had to have an MRI done over again becasue of a defect in the image, so even those machines are not infallible.
love those week 36s
i7 920
Patriot 3x2GB
gigabyte ex58 ud5
Tuniq Tower 120
75F ambient temperature
4578 Mhz superpi
4305 Mhz prime at 1.344 Vcore
4011 Mhz prime at 1.184 Vcore
^^^ wow bro, props to those clocks bro.
A chip
Let's see some longer runs, Roller. Five minutes isn't really indicative of much.
woah that's way better than my 920 3836A756!, what is your full batch number again ? It's for this thread http://i4memory.com/f55/i7-920-batch...e-share-13570/ :)
I think this is the best I can do "ht on" at 21 cpu multi - keeping all voltages within intel specs (on water) - over night prime run - 9 hrs prime stable -
Man I get so sad when I think I got one of the worst clockers around :P 3838A :(
People doing 4Ghz with 1.3v or less when mine requires 1.42v, and the heat output is so massive by then (low 80's) that I can't run Prime for too long
OC on mission-critical machines? Yes please!
You sure you're in the right forums? :D
:rofl::ROTF::ROTF:Quote:
Originally Posted by SteveRo
Sorry mate, had a real good laugh when I saw this... 1,52V vcore being within Intel spec? Not even close :p:
Nice OC anyway :up:
Well on my box it says something about 1,3xV max as with the C2D's :confused:
3836a977
I had been reading how much better the B batch ship were so I bought a new 940 3837B125 chip. Now you guys are saying that A is better?
Which is it?
I have an A chip and it sucks. Can't do more than 200 bclk without really high qpi/vtt.
I decided to get the 940 to see what the difference was compared t0 the 920. Is it binned higher? Can you achieve the same frequencies with less heat, etc..
Do you think $490 for a 940 is a good deal?
There are going to be great and bad chips of all batch ranges, any patterns that seem to emerge with certain ones if you ask me are entirely coincidental :yepp:
Im suprised they run at 1600, most manufacturers dont even guarantee that two sets will work at spec
Great news on 3836B043! This chip is DEFINITELY a buy! It's only been in for about a minute so I haven't tested it much yet.
My other 920's and 940 took 1.4v+ to even boot Vista at 4GHz. I took out my previous 920, which took 1.3V for 3.8GHz stable, dropped in the 3836B043, left it at 1.3V and raised the BCLK to 211. Booted right into Vista!
http://img155.imageshack.us/img155/8890/3836b043cv2.png
Will test further later.
Edit: Can't get it Prime blend stable no matter what I do. Tried PLL up to 2.1V and uncore at 1.4V. Vcore up to 1.425. It seems to fail when it hits 86C or so. I don't think it likes the heat.
Sorry if this is a dumb question.... or covered before. I just got my new i7 rig setup and am testing to find max OC. My goal is 4.0GHz 24/7 with HT on...
So, with a 920, how are you guys able to use a 21x multi? My ASUS P6t WS Pro stops at 20x... I'm currently in the middle of Priming at 211 x 9x .. but wanted to try a 21x multi, if possible.
Oh, and HOLY CRAP these i7's runs HOT! Mine's getting up in the mid-high 80's!
3841A432 BTW
EDIT: Doh, just BSOD'd at 27 minutes Priming.
What I'm trying so far: ANY SUGGESTIONS?
CPU - 19
BCLK - 211
DRAM Freq - 1269 (taking it out of the mix)
UCLK - AUTO
QPI Freq - AUTO
DRAM Timing - AUTO
CPU V - 1.375 BIOS
CPU PLL V - AUTO
QPI/DRAM V - AUTO
IOH - 1.12
IOH PCIE V - 1.52
ICH V - 1.20
ICH PCIE V - 1.60
DRAM BUS V - 1.64
All other DRAM V - AUTO
LLC - EN
CPU DIFF - AUTO
CPU Clock SKEW - Delay 110ps
CPU SS - DIS
IOH Clock SKEW - Delay 110ps
PCIE SS - DIS
steve any pro tips for getting such great temps? Im on a gtz as well with a single 3x120rad with 3 slipstream 116cfm fans and my load is higher at 1.375 set in bios. What is your ambient like? thanks and nice oc
Bob - I went over and posted that I was a water nub in the cooling forum (which I am - this was my 1st water build) - I got excellent help - here is the thread, also below was what I bought and built.
I don't have one the golden procs - but what I have now is a cooling system that allows me to apply the big volts and get away with it - I couldn't do that on air with the nehalem I was dealt - too much heat!
http://www.xtremesystems.org/forums/...d.php?t=212948
man that Feser Xchanger is sick. I'm on a garbo 2x120 Swiftech MCR220 with a couple of 60+CFM scythe fans so I'll be looking into that feser very soon :)
So, on this ASUS board, I don't see a "Turbo" mode anywhere. I see HT and some other stuff, but no Turbo anything. I'd like to find it, so I can get the 21x and lower my BCLK.
I've got a brand new perfectly lapped TRUE Black with a 38mm fan on it on medium.
The feser was pricey but looks like it was worth it.
Bob - the other thing - I am operating an open case - tech station in a cold basement - house furnace is barely keeping up - about 18F outside at the moment!
I probably need a new furnace - lets see new furnace or new computer stuff - new furnace or new computer stuff - ok - new computer stuff!
I don't have an ASUS board, but I remember someone saying(and I don't remember which board they were referring to) that you needed to turn Speedstep on first before you can toggle Turbo mode. But, we probably need someone with an ASUS board to better answer that for you.