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What is your best rock solid stable overclock (8 hours prime/orthos/etc., give or take) on a RETAIL 45 nm CPU. It is looking like people get crazy high OCs but stable levels are far below. Indicate your CPU, stability test, cooling, vcore, FSB, and mobo.
Especially curious about the new dual cores.
Edit: If you DO post an ES chip anyway, please indicate that fact.
Screenshots always appreciated.
Edit: Don't claim 4.6+GHz stable w/o a screenshot!
Prime 12 hours
QX 9650 @ 4.1GHZ
Water
vcore @ 1.42v
FSB @ 430
Maximus Formula
I guess you probably have to specify which 45nm we're talking about as all of them has different clock speed?
I left out a critical comma. ;)Quote:
Originally Posted by aoch88
List which CPU you are talking about. More interested in the written answers than the poll. The poll is just for a general feel over all types and core counts. Nothing scientific.
From what I see those E8400 are very much a mixed bag. Some does good oc at low voltages and had it stable. For mine, I can boot 4.4Ghz+ easily and do Super PI but it isn't stable. Had a hard time getting it stable even @ 4.2Ghz.
It's all about luck sometimes. I had the same batch number as someone that does high o/c with low volts but mine can't.
e8400 Q748A115
4.0ghz - 8 x 500
1.36vcore
8 hours prime, 30 min occt
Max OC - 4.5ghz with 1.43vcore
I think I could get stable a little higher but don't want to try it for a while until more data comes out on how high voltage effects these chips. For exapmple occt stable at 4.2ghz 1.39vcore but prime failed.
CPU: QX9650 - L740A931T (I still don't know what the "T" means)
Stability: Over 18 hours of folding@home SMP.
Cooling: Air - Noctua NH-U12F + low speed 120mm
vCore: 1.248V
FSB: 400MHz (1600MHz quadpumped)
Mobo: Asus P5K-E
Overclock: 4.0GHz
Remarks: Limited by cooling here.
On my Stepping 4 (B1) e8400es I only hit 3.8-3.9ghz stable for orthos blend. 4.0ghz won't pass orthos no matter what increase in voltage. However, doing 3.8ghz at 1.3vcore.
My retail e8400 arrives next week. Hopefully stable in the low 4's.
Stability: 4.1Ghz
CPU: E8400
Stepping: CO
Week: Q747A374
Code: SLAPL
Vcore: 1.4375v (1.40v load)
Cooling: Air - Thermalright Ultima-90 ES
Motherboard: P35 Asus P5K-D
Bios Version: 603 (705 was aweful)
Operating System: XP
RAM brand: GSkill
RAM rated speed: DDR2 1000
RAM actual speed: 953Mhz
Latency: 5-5-5-15-Auto
anything above 1.4625 and or 4.3Ghz and its not prime, occt, nor orthos stable
Would the people who claim stable at 4.6 GHz and up please provide details? I assume that is one of the new wolfdale cores on phase but confirmation would be nice.
Thanks.
E8400.. Q746A477..
Abit IP-35 Pro BIOS 16.03 Beta
Cooling in Sig..
4.2 Ghz @ 1.34vCore
4.25 Ghz @ 1.36vCore
4.3Ghz @ 1.39vCore
Havent tried for more 24/7 clocks yes, My temp's are VERY high, for Watercooling. Almost 61C Prime Loaded @ 4.3Ghz @ 1.39vCore.
I want to comment on this,Quote:
Originally Posted by Speederlander
Why do you think 8hours Prime is an indication of ROCK stability? There are application which loads Core2 much much higher than Prime, like Intel Linpack 64bit,
but even passing 100+ iterations in Linpack, which is really enormous task for Core2 especially on air, does not guarantee full stability in other application.
As a side note, then i see claims like 4+ Ghz with Q6600 or high 4.5GHz with newer 45nm CPUs, i know this is not really stable for sure.
One might think that as it is pretty much the standard in most credible forums. There are also forums where people consider Super Pi as good enough. I, personally, do not possess enough knowledge to state categorically that 8 hours of Prime proves stability. I do consider it to be an acceptable test as I have read so many posts by folks that have a great deal more knowledge than I that say so.Quote:
Originally Posted by Cronos
What are your credentials?
I do agree with this. I, personally have had a setup that was 8 hours Prime Stable (note I said Prime stable, which cannot be argued with) yet failed 3D MArk 06. Turned out my memory overclock was too high for 3D applications.Quote:
Originally Posted by Cronos
Wow, now this is an emphatic statement. Only people with iron clad reputations and credentials should make statements like this. Please, let us in on your background so that we may judge for ourselves if you are correct, or just have an overinflated opinion of your own self worth.Quote:
Originally Posted by Cronos
I've got Abit IP35 - tell me please what vcore did you set in BIOS.Quote:
Originally Posted by Ad1tya
batch/specs in sig, loadline enabled so bios and CPUZ volts close. Scaling at exactly .05v for every 100mhz over 4. 4.1 10hrs orthos pic in other e8400 thread.
4.0 orthos stable 1.2875 bios, 1.28 CPUZ
4.1 orthos stable 1.3375 bios, 1.33 CPUZ (turbo, memperf 7, ram 4,4,4,12)
4.2 orthos stable 1.3875 bios, 1.38 CPUZ (stand, memperf 8, ram 5,5,5,15)
4.3 orthos 1+hrs 1.4375 bios, 1.43 CPUZ temps too hot, over 70 load on water, so not doing full run.
My 24/7 will be 4.1 to 4.15. FSB above 465 for 4.2 and 4.3, I have to decrease mem performance to 8 from 7 and loosen mem timings to 5,5,5 from 4,4,4, resulting in 4.3 slower on everest benchmarks, and nearly same spi score as 4.15.
although I'm one of them that isn't impressed by the "suicide shots" of really high clocks that people post superpi shots of, usually prime95 is good enough for testing system stability for me, assuming I stress both the CPU and the RAM separately then both at the same time. I'm hoping to get 4.2 out of this chip.. if I can't, I'll probably just keep my Q6600 as it's a good batch with a low VID that can hit 3.6 stable on 1.35 volts (1.3 in windows, 1.26 with vdroop)
looks likely 4.0-4.1 mostly with a few lucky ones getting 4.2+ from the un-"scientific" poll
Quote:
Originally Posted by Capt Proton
I can't vouch for intel but i can tell you that with AMD 8 hours is not 24/7 stable............In fact when a cpu is close but not quite 100% stable it fails usually within the 10-12 hour mark.......
Take into consideration also that alot of people during the winter toss open a window.......so summer time would be the real deal on whats 24/7 stable.....ambient changes the game alot.
Also taking into consideration that some locks such as PCI rarely work......which can be noted due to your hard drives performance and noise, my old 36g raptor will tell me right away if PCI locks work......NIC's also are prone to be less stable............
100% stable is sort of a myth however most users here can perform most of they're needs wants at they're 24/7 stable settings without failure.......If in fact you placed the hardware at such settings in a mission critical situation such as a server with high traffic........Failure would be imminent..
Now since i made this claim here's my reputation/credentials.....I've been in the amd camp for quite some time since slot cpu's ;) And I've managed some preety insane stuff, I was waterchiiling back in the duron days.....last year I was beta testing reference mobo's for ati...........
All that said, this is XS and we push things to the limit, most of just need it stable to do what we want it to do, game, bench, crunch etc......and 90% are happy with that........
Intel is same, sometimes it craps out from 8 to 12 hours, and one notch hirer solves it. Case in point, just after posting my 10 hr 20 mins orthos stable in official E8xxx thread this am, I left it on expecting to come home for lunch with 14 hrs, and it stopped at 10hrs 52 mins. So now up to 1.34x from 1.3375. Probably wouldnt matter either way...but running again at 1.34.Quote:
Originally Posted by chew*
May i again stress the fact that Prime95 is not nearly as stressing to Core2 as Linpack64 ?
Sure, if you build a computer to run Linpack 24/7. :rolleyes:Quote:
Originally Posted by Cronos
I know I built my machine for folding and playing 3D games, and for that it runs perfectly fine. Prime95, let alone Linpack, is a far more strenuous workload than most normal uses, and as such Prime95 is a perfectly good stability test. I really don't know what you are trying to prove... this is XtremeSystems, not MissionCriticalStableSystems. If we wanted our computers absolutely guaranteed stable we would run them at the manufacturers nominal settings.
QX9650 4.0GHz @ 1.37 vcore
Not 8hrs,but atleast a screen shot.Took the last week off of overclocking this set up.Maybe try again this weekend.
Lets see some screen shots:up: .
http://www.xtremesystems.org/forums/...&postcount=425
I've tried 2 8400's, both are Q748A.
The first one (Q748A242) was very lousy. Couldn't be stable @ 4.0ghz regardless voltage. best stable was 3.8ghz with 1.37v under load.
The second (Q748A141) is a bit better. It's stable @ 4.0ghz but needs a rather high 1.39v under load. BTW i can boot even @ 4.5ghz (spi 1M @ 4.3ghz) but stability is out of the question. :p:
From what i've seen Q748A produces among the worst results.
All these are on air cooling.
E8400 Q740A555T* Note the "T"* So far, nobody has been able to find out what the deal is with the "T" All I can determine is that some XS members from Canada and Australia have this letter at the end of their FPO/Batch#. Any more info would be appreciated:p:
Pack Date: 12/20/07 VID:1.1125
Running 24/7@4005 445x9 Vcore:1.344v Gigabyte P35-DS3R, TRU-X
See sig. for more details.
Longest Orthos run was 8hrs 30 minutes, I then shut it off, did not fail test.
I have had it clocked higher but don't want to exceed 1.4v and am quite satisfied with a 4G stable oc and good temps- hits about 57C running Orthos.
Highest stable for 8 hours of stressing on my qx9650 has so far been 4125 mHz with 1.42v actual.
I'm starting to question the 4.6GHz+ number...I just don't seem to see people getting those numbers ever posting stability tests beyond SPi, except for a couple of people (really only 1 that I can think of off the top of my head). Maybe a lot of phase people are sitting on their results? Because that's not going to happen without phase.
I'm just as curious and would like to see 4.6Ghz+ stable screenie as well. Many people are just giving baseless claims. I guess for normal usage, the max. these chips can do are only around 4.3Ghz.
It doesn't make sense to spend around $200 for only a Super PI screenie. I rather get a E6550/E6750 and overclock the hell out of it. Only a 400-500Mhz difference.
My cpu is not the best one i am trying to run orthos at 4050@1.45V but after 45 minutes it fails. But i prefer it over my previous very good E6750 i had @ 4.2 benchable because it is colder at same clocks and have a nice boost with 2mb extra cache so it is worth the money difference (10 euros in greece)
Quote:
Originally Posted by Spyrus
10 Euros is ok but over here in the stores, price difference is quite a bit. Btw, you didn't have any issues with temp readings on your board?
You have to weight Vcore, cooling, FSB and capabilities of your ram too:)Quote:
Originally Posted by aoch88
Heres 1.14vcore...8500ES
http://img82.imageshack.us/img82/956...shot187pk4.jpg
4.4G 8500 retail, it stays for 6 horas too...
http://img98.imageshack.us/img98/178...shot064ar2.jpg
CPU: QX9770
Stability: 24/7
Cooling: Air - Thermalright SI-128 + 120mm (1000rpm)
vCore: 1.31V
MP: 9x
FSB: 450MHz
Mobo: Asus P5E3 Deluxe with Bios 1001
Overclock: 4050Mhz
Remarks: Limited by air cooling setup, still looking for a better cooling setup.
Picking up what chew* was saying (hi m8), back in the heyday of AMD s939, you had to show 8 hours of prime per core before you went in the list with a 'stable' or usable overclock. Standards kind of went out of the window with Conroe, with people showing fast single instances of SuperPi 1M and saying "lookit that!". Well, Core 2 is fast at single instances of SuperPi because of the cache architecture, granted. But stability is way way down from those speeds.
Dumo, your overclocks are always solid heh :up:
If you can get 4ghz rocksolid I think you must be happy, if you can bench it at 4.5 under good air or water you are pretty lucky... we all know things can get better but if almost everyone can get 3.8-4ghz out of a retail CPU with moderate voltages what's there to complain ? Some users couldn't even get 3.6ghz at moderate volts a few months back...
I like benches too and max OC's for earthshattering results but do you really think there's much gain on day to day basis by boosting ya CPU from 4ghz to 4.5ghz in games ? Before you need that power we will be a year from now (at least) and retail CPU's will be around 4ghz maybe then...
If I can get 4ghz out of my qx9650 at around 1.35 volts I'll be pretty pleased as my Q6600 needed 1.55 volts for that and could not keep those speeds for long sessions... I'll prolly run that CPU at 3.6Ghz 24/7 for folding purposes, less heat output, less wattage needed... that's what's it all about for me... suicide screens are nice but not needed for daily users... and that is what 45nm is all about, not to gain another 500Mhz or 1ghz more...over ya current OC
People's goals are really far from realistic and are blinded by the experts' runs... if Hipro5 does a benchsession at 4.5ghz , many think they can do that too and use those speeds day in day out... not even thinking George doesn't even use a case, uses very advanced cooling, mods, ... way beyond their knowledge of hardware... they just cranck up the volts and their CPU/mobo flies... and then come back a few months later ( if it takes that long ) that this mobo is a piece of sh*t or that CPU's is totally bonkers...
4Ghz 24/7 mates is a feast, do not use more than 1.35-1.4 volts on these CPU's for 24/7 abuse... benches are fun but just like mobile phones were in the days, only to be used for a short duration of time...
Problems with all this stable business is nothing but temps. Penryns do oc high, we know that but for 24/7, there are way too many factors to consider. Most of the Penryn temps are complete BS, a known problem. So you have no idea what temps you're running at whilst stability testing because the probes don't function accurately and this is one of the most crucial factors before calling something stable. I have my own opinion on this for my own system which I reserve since I only use it in my own systems or the work systems I manage, i.e. stay below 55C load at 22C ambient air to keep in mind low noise/high ambients throughout summer, but that can still be more lenient since there is headroom. The E8400 I had was reading 16C idle at 22C ambient with a heatsink and no fan. Still waiting for the next one. :shakes:
The only one working sample I've seen out of the last batch we got delivered at work was an E8400 ES 3GHz 1.1V my boss had and it idled 34C and load was 50-51C on a Tunic Tower 120 with 22C heatsink ambient running Prime95 25.6 after 3 hours (Orthos gets it to 47C). And 1.4V 3GHz was topping 60C idle, so I know what to expect when I see these "stable" labels. Things are just too clear with IC physics; voltage will throw the TDP/heat up by the square and frequency will throw it up high all alone too.
IDK about the new Penryns since I've not played with them much at all but for a few minutes, but with the new AMDs, there is no way 8hrs P95 stable is actually stable. Game it heavily, bench it, load cycle it, reboot it a few days at those settings after 12-24hrs stability testing and you have it stable. Most of the ones that passed P95 8hrs with Phenom can't even game because it's idle->load->idle fluctuations (dynamic load) which shows its unstable rather than static load which is easy for it to do.
E8200 max stable (12 hour Orthos small FFT) OC 4.2ghz (8x525).
Are the temps on these 45nm CPUs really a problem? At the end of the day they may be reported incorrectly, they may be high, but surely if you're 35 degrees off TjMax then you're OK? Surely it's set that high for a reason.
I ran a Prescott P4 at 85 degrees for 3 years without a problem, doubt that was as far off TjMax...
I really think temps are an issue but surely CPU voltage will degrade their performance more rapidly then their 65nm counterparts.... and really I don't see the point in running Prime for 12 hours as I have done this before and a game rebooted the pc in a matter of minutes while prime didn't show any errors... I really do some benches, play some games verify my temps regurarly and then when I'm not on the pc it folds on the cores available... if it survives all that then i call it stable ...
Prime and co is good to have an ida but you still can encounter instability with several apps...
Three rules:
Max safe silicon volts is always lower the lower process node you go.
Max safe silicon temperature is always lower the lower process node you go.
Silicon degradation incl. electronmigration is much higher the thinner the metal gate and the lower the process node you go (with higher current/volts).
So, at 45nm, you are going to have to stay lower especially with regards to voltage. That's why max Intel specified is 1.45V for 45nm and there have been many dead CPUs even under cold with volts just above this.
Staying 10C below 70C fully loaded in winter/summer is fine, but that's if you really are below it and depends on if you're one of the lucky ones with a working set of core probes. Most aren't and read unrealistically low values, unfortunately.
True, Prime is not the be all and end all of stability testing... But it's still a good test. I run games on it all day anyway, so I'd notice any instability there.Quote:
Originally Posted by Leeghoofd
Sure, 45nm chips are more sensitive to voltage than 65nm, hence 1.45v max safe voltage instead of 1.55v. I can't see 1.45v degrading it much, given that 1.55v doesn't seem to have significantly degraded 65nm's.
Still don't think temps are as much of an issue as people are making out. They hardly change at all when overclocking, so it's not like the CPU is getting a massive increase in thermal load. Oh noes my poor IFX-14 with 3x 120mm fans can't keep the CPU <68 deg. stock, underclock it quick! :shocked:
OK so 45nm need less voltage, but they're getting less. I seriously doubt 1.45v is going to kill my chip within a year or 2, just like 1.55v won't kill a 65nm.Quote:
Originally Posted by KTE
They need less heat, but they run cooler too. Have you seen the puny heatsink they come with? I'm sure my lapped IFX-14 can do better. And if they run cooler, why is TjMax 30 degrees higher than 65nm?
My 65nm ran at 45 degrees with 1.55v and I seriously doubt this is running any hotter with 1.45v. In fact if you go by TjMax - CoreTemp I'm 35 degrees off max, where as with 65nm I was 32 degrees off. Sounds about right!
Many dead CPUs???Quote:
Originally Posted by KTE
Any links about this?
Well, I don't know about his comment, but I've seen several of the bigger guns around here mentioning they killed chips. If I come across discussion I will post it. It does seem a legitimate issue.Quote:
Originally Posted by Marios
But has anyone killed a chip with =<1.45vCore?Quote:
Originally Posted by Speederlander
well i can get to 4.5G and start up prime
it will crash at anywhere over 15 mins to 1h 20 mins
I'm still trying to tweak the vcore & mch
http://picasaweb.google.com/jaredpac...09687938025426
http://picasaweb.google.com/jaredpace/45ghzPrimingOnAir
Probably not. The ones I heard of all run LN2 and 1.9V+, could be even ES not retailQuote:
Originally Posted by brenanh
Mine is 8hr stable. Going for 4.7 at the moment.
http://ocidb.com/albums/userpics/100...hos-stable.JPG
The best I could do was 3.8 and I had all the settings you had. Like said, Lucky You !!!
Quote:
Originally Posted by Spyrus
I got the exact same batch as you, retro...And running at the exact same FSB and vCore: 445FSB @ 1.344v (1.365v in bios). I have had mine up to 4600MHz @ 1.545v, but only SuperPi stable.Quote:
E8400 Q740A555T* Note the "T"* So far, nobody has been able to find out what the deal is with the "T" All I can determine is that some XS members from Canada and Australia have this letter at the end of their FPO/Batch#. Any more info would be appreciated
Pack Date: 12/20/07 VID:1.1125
Running 24/7@4005 445x9 Vcore:1.344v Gigabyte P35-DS3R
I'm curious about the "T" designation in the batch code, also. What does it mean, and why do some cpu's have it, while most do not? I have seen two posters from Italy and Greece with this T also...Perhaps T for Terrific? :)
dude can you post you settings? i cant even get mine past 10 minutesQuote:
Originally Posted by Forsaken1
http://www.xtremesystems.org/forums/...&postcount=799Quote:
Originally Posted by Xvys
799
Seriously though, you found two other countries with the mysterious "T". They are probably all scattered around worldwide.
Maybe somebody from XSF will shed some light on this. Seems that we have a very early Batch Code though.
"T for terrific", that would be good. You were able to hit an impressive speed there:up:
Mine has been completely stable for a few days now@4005. At a reasonable vcore too.
Seen a lot of complaints about the temp readouts on the forums on these E8400's. How are yours? I have been completely satisfied with my "T's" readouts, idle and load temps in Coretemp seem very realistic. The cores only vary by a degree or two, no "frozen" temp readouts either.
Glad I have a Mr. "T" chip:cool:
Good luck:up: .Quote:
Originally Posted by nama
Abit IP35-PRO 14
513x9.Did not like 512x9 no matter what.Diasabled eist and c1e.
Vcore:1.6v bios/1.55v idle/1.5vload
VTT:1.27v
MCH:1.48v
RAM 1:1
DDR2:2.3v
DDR2REF:2%
ICH:1.12
ICHIO:1.8V
gTL:68%