EVA, 3.9GHz @ 1.344v seems a bit too high for a D0. I've seen most of them getting 4GHz+ on about 1.25v. Have you tried lowering that voltage?
I got 4GHz (20x200) on my C0 at 1.3750v (BIOS) and 1.344v (CPU-Z idle). That was with HT off.
Printable View
EVA, 3.9GHz @ 1.344v seems a bit too high for a D0. I've seen most of them getting 4GHz+ on about 1.25v. Have you tried lowering that voltage?
I got 4GHz (20x200) on my C0 at 1.3750v (BIOS) and 1.344v (CPU-Z idle). That was with HT off.
Looks like indeed vcore was a HyperPi 8x 32MB test related as I ran the following 4000Mhz at 1.312v (haven't tried lower vcore yet) without problems
Powermate wattage meter system power draw from wall in bold.
- 1hr Prime95 Small FFTs (~533W - 544W)
- 1hr Prime95 Custom Blend 5400MB memory allocated (~550W - 562W)
- LinX 0.5.8.2 10 pass with 768MB allocated (what most folks incorrectly use instead of all memory test) (~562W - 570W)
- LinX 0.5.8.2 10 pass with ALL memory allocated (~565W - 572W)
1hr Prime95 Small FFTs
http://fileshosts.com/intel/DFI/DFI_...ime95_load.png
http://fileshosts.com/intel/DFI/DFI_...rime95_1hr.png
1hr Prime95 Custom Blend 5400MB memory allocated
http://fileshosts.com/intel/DFI/DFI_...blend_idle.png
http://fileshosts.com/intel/DFI/DFI_...blend_load.png
http://fileshosts.com/intel/DFI/DFI_..._blend_1hr.png
LinX 0.5.8.2 10 pass with 768MB allocated
http://fileshosts.com/intel/DFI/DFI_...768mb_load.png
http://fileshosts.com/intel/DFI/DFI_...pass_768mb.png
LinX 0.5.8.2 10 pass with ALL memory allocated
http://fileshosts.com/intel/DFI/DFI_...llmem_load.png
http://fileshosts.com/intel/DFI/DFI_...sss_allmem.png
System:
- i7 920 3851A368
- EK Supreme LT 1366 / FESER 480 / MCP655
- DFI UT X58-T3EH8 04/28 beta
- 2x HD4870x2 Crossfire (Powercolor + Gigabyte flashed to Asus Top bios) with ATI Win7 9.4 (8.612 WHQL)
- 6GB Corsair Dominator GT DDR3-2000Mhz 7-8-7-20
- 750GB Samsung SATAII
- Silverstone OP1200 PSU
- Triple boot - WinXP Pro SP3 / Vista Ultimate 64Bit SP2 / Win7 Ultimate 64bit RC
But yeah it ain't near any of the good D0 results heh
I have a D0, sadly it's marked Intel Confidential so I can't say more until the NDA lifts at the end of the month.
:up: Hi!
Does anyone have a i7 920 whit GSKILL 6GB 2000MHZ TRIDENT (CL9) on a Asus P6T Deluxe, i can`t even boot whit this memorys.
Whit my old memory, Corsair 1600, i have 920-3800-> corsair 8.8.8.24@7.7.7.20->OK.
Can someone help me, please??
Ty :up:
PS-> Sorry my Bad English.
It really depends on your CPU and its integrated memory controller.
Try raising the VTT voltage, it should help.
hi guys, I havent posted in this thread for a while. I've just been working on ramping up my ram speed lately. This rig crunches 24/7 so what do you'll think of these settings? THey are a bit conservative so that my Elec. bill does not eat me alive
http://img.techpowerup.org/090530/Capture246.jpg
New personal record for my batch B027, 5279 Mhz. 1.389 Vcore
http://valid.canardpc.com/show_oc.php?id=576759
also, a screen of a 5195 superpi run and a 5006 Mhz 3DM06 complettion , all at 1.389 vcore
very good job roller, what are you using to cool it? THats a heck of a clock.
Here is what I ended up with after testing, W3520/760/Corsair GT cas 8 6Gb, and 2-Sapphire 4870x2 with Swiftech Caldera water blocks with modded bios no volt mods. Most of these where done on the OCZ Cyro Z but I did try the F1 Kingpin pot once I seem to have a coldbug around -68c so not much better scores or clocks than the SS. This is Windows 7 64 bit RC1 no tweaks...
cpuz
http://img3.imageshack.us/img3/9344/cpuzdij.jpg
superpi1m
http://img6.imageshack.us/img6/8950/signatureimgh.jpg
superpi32m on water cooling
http://img3.imageshack.us/img3/30/superpi32m.jpg
wprime32m
http://img3.imageshack.us/img3/3963/wprime32.jpg
wprime1024m
http://img3.imageshack.us/img3/360/wprime1024.jpg
pifast
http://img3.imageshack.us/img3/1128/pifast.jpg
AM3
http://img3.imageshack.us/img3/9027/am3l.jpg
3DM01
http://img3.imageshack.us/img3/3755/3dm01.jpg
3DM03
http://img3.imageshack.us/img3/7913/3dm03.png
3DM05
http://img3.imageshack.us/img3/3258/3dm05.png
3DM06
http://img3.imageshack.us/img3/1271/3dm06z.jpg
With water cooling, I have a couple SSDs coming to try to improve PCMark :down:
http://img3.imageshack.us/img3/4647/pcmarkvantaget.jpg
very sweet benches, thanks for posting your results.
love that CPU speed for the W3520, oh so sweet!
thanks road runner, lovely clocks on that Xeon :up: Did you forget to run any bench mark :rofl: Good job!
How did you get AM3 to run properly in Win 7?
I didnt, sorry about that AM3 and 3DM01 are in XP. The rest is win7 but you should be able to get it to run with the patch, scores will be less or it was when I tried it in Vista64... http://www.geocities.com/superxpfx/A...Bit_Patch.html
RR
A validation is one thing, but you're running demanding apps at high clocks...great job!
Also, you mentioned 'cold bug'. What does that mean, how does it manifest itself?
ok, this 100% stable for me:
core I7 920 D0 cpu stepping: 3849A846
Asus P6T deluxe (V1) with bios 1504
12GB of Patriot Viper (6x2g)
water cooled with Dtek Fuzion 2 WB
single GTX 285 with DD Gtx 285 WB
http://img13.imageshack.us/img13/9323/stable.jpg
Road Runner...
When cold bug caused no reboot, how did you fix? Did you just wait for it to warm up? Also, were the status LEDs dark, or some error code?
Yea I just waited a few minutes, kept pushing the reset button as it warmed up until it come on. LEDs status was hung on FF if I remember correctly. I already new there was a good chance of cold bug as I have read plenty about it and had the same problem on my Gigabyte board the first time I used LN2. I learned from the first time to take the temps down slowly instead of dumping LN2 in until it was down to -180. May not be the right way but I am new to LN2...
Road,
Another question....when ppl are showing thermometers at like -87C and such, are they putting their probe at the bottom of their pot? Or are they somehow measuring the top of the CPU heatspreader?
roller, these are some good questions you are answering. I have been trying for a while to find my way into extreme cooling so these are things I would like to know. Thanks :up:
...and thank you roadrunner for the answers :)
I dont know how others do it, I just took a screw driver and stuck it in between the insulation and the F1 to pull the insulation away for a minute to shove the wire down in there as far as I could. On the SS I ran in through the eraser and had it laying on that lower part of the heat spreader, I am new at sub zero cooling though... :shrug:
http://img193.imageshack.us/img193/4360/cpumuz.jpg
Thanks for the pic, that makes it clear.
best overclock I have been able to hit so far with my C0, have not had much time to work on it better.
http://img.techpowerup.org/090605/4.126 HT on.png
Roller11:On the pots i have, it have holes drilled in the base=)
Does anybody here now anything about Xeon W3520 batch:3849A773?
Holy :banana::banana::banana::banana: just Priming at 4600mhz at 1,44v on a core i7 extreme 975 and this is on air with Noctua cooler for Lga1366
LinX
http://img222.imageshack.us/img222/5...gat4600mhz.jpg
:eek: good cpu indeed... Week 45
That is a nice clock, let see how much higher you can go
4.41 Ghz at 1.34 vcore/1.34 qpi/vtt for 24/7, linpack 5gb 20 run, and prime 8+hrs stable.
http://img195.imageshack.us/img195/6...e70maxtemp.jpg
rge, thats still an amazing overclock bro :up: great job
Working on this for my 920...man temps go crazy from 4.4 to 4.6 adds 10 degrees even after turning HT off!
http://img.techpowerup.org/090607/4.62.5hr.jpg
Sweet clocks bluehaze!, yep some of these chips are hot.
Chicken Patty, I am on water, PA 120.3 6 1400-1500 rpm fans push/pull, dedicated cpu loop, air intake 26.2C, water temps after 13 hrs prime were 32.1C, so 5.9C air to water delta. CPU gradient from core to water is crazy 50C,...10C higher than my i940.
Heatkiller might give me 1-2C better temps, my air to water delta is already low at 5.9C, best I can do with quad rad, etc would be another ~2C there. Might get 4-5C better temps. Real problem is water to cpu gradient which cant do much about, unless IHS is making bad contact from shape, but again probably talking a few C at max I could gain...though it would all add up. I reseated several times all with same temps.
But I will say, there is no such thing as too much radiator for an i7.
I agree man. Why dont you get one of these puppies :D
http://www.performance-pcs.com/catal...ducts_id=25231
Since you're discussing watercooling an i7 I might as well chime in here. I'm really in shock about those temps some people are reporting, 70°C and up on water?!? What could be the factor for that? I have two PA120.3 and an Fusion v2 (for which I'm still missing the 1366 mounting kit) waiting for the job, but I'm not so sure anymore that that is enough. Since the IHS on i7 are soldered I though that might ensure good heat transfer between core and IHS, so maybe the people reporting those bad temp just have really bad IHS? Or might it be a matter of mounting pressure? So if I lap that W3520, put Coollaboratory on as TIM and somehow manage to get higher mounting pressure, would I still be in for bad load temps? (btw, would it be better to get the D-Tek mounting kit or is something else more pratical to raise the pressure, if that's even needed)
Edit: Any thoughts on this batch btw: 3848A365 ?
Geez.. this D0 stepping is HOT..
With my C0 I could use 4.2 HT On with 1.46V and temps ok... with this D0 anything above 1.4V temps get way out of hand... And what sucks the most, is that I can't bench with more than 4.378GHz...
My watercooler is on its way.. when its done, will post here better clocks hopefully..
finally got my voltages and temps under control.
8hrs. Prime Stable
http://i143.photobucket.com/albums/r...42ghz1256v.jpg
and today i was working on this. Prime quick test 1hr.
http://i143.photobucket.com/albums/r...45ghz1384v.jpg
omg....4500 stable on AIR. Have u photo your configuration?
sorry i dont, but i can list the components used.
i think this chip can do more....
MOBO: Asus P6t Deluxe - BIOS 1504
CPU : i7 920 Batch# 3846B109
COOLING : Water single loop - D-tek Fusion, Swiftech 355, swiftech 1dual + 1single rad, 4870 in same loop with EK Supreme block, xspc restop, 3/8 tubing
RAM: OCZ Gold 8-8-8-18
nice! looking at those temps i knew you couldn't be on air.
this is what air gets you :( (prime95 was halted but look at maximum temps in real temp @ stock volts)
http://i280.photobucket.com/albums/k...de/180BCLK.png
Who knows the batch # 3910A250 - I7 920 D0?
Dorki: That is not so bad temps on air, what kind of air-cooling do you use?
reason why these chips run so hot? I dont know. But there is never enough radiator for an i7 as it was said earlier by someone. I have a HW Labs GTX 480, with a MCP 655, and Apogee GTz, and this things beats up my rad when I go over 4.1-4.2ghz. Really, i7 has made users step up as far as watercooling. You, with dual rads, you might be fine, but still you'll notice that at one point or another that it still kicks the rads ass.
:shocked:
4200Mhz HT 1.20v
http://img7.imageshack.us/img7/3339/cosmoss24200.png
Not as good as yours, but not bad either:)
http://img87.imageshack.us/img87/8505/42p123h.th.jpg
Very nice ;) Can't you lower the VCORE a bit more?
Dont know yet:P Its stabil on 1,2v on 4ghz, and i run 20 min on 1,23 on 4,2. So i will try some more tomorrow and will of course post it here;)
And i used 1.27 on vtt on 4,2.
And that AC-waterblock isnt good to take the heat, so i will get a new top and 1366-mounting to my Gtx block in the end of the month...i think the temps wil get better then.
What vtt did you use?
Multi: 21
BCLK: 200
Vcore: 1.21v (bios)
Cpu Pll: 1.81v
QPI: 1.20V
Rams: TeamElite 1333Mhz Cl9 1.5v @ 1600Mhz cl9 1.55v
This memory rocks, they clock nicely even with low voltage
On Rampage II Extreme :up:
Been discussing my hot i950 issue with Unclewebb for couple days...and we thought testing TDP/watts on my i940 C0 vs i950 D0 would help sort the difference in heat between 2 chips. At stock, max TDP per intel is 130 watts, though cpu to cpu will vary quite a bit, and batch to batch will vary, hence why intel calibrates part to part.
i940 at 4.3 ghz, 1.49 vcore, pulls 224W per everest, 590W per kill-o-watt meter for computer, load temps were 87C.
i950 at 4.3 ghz, 1.49 vcore pulls 278W per everest, 650W computer, load temps 98C within few seconds, would no doubt go higher....(only need 1.3 vcore for 4.3ghz on this D0 but used 1.49 for apples to apples comparison)
Temps measured by realtemp, TDP per everest and k/w meter in manner seen here
http://www.xtremesystems.org/forums/...52&postcount=5
When trying to cool 278W from small point source like cpu, the gradient from water (30C) to core (98C) is 68C. So even if kept water temp at 30C with massive rad (5C over ambient for me), cpu is still going to be 98C under those circumstances...unless you improve waterblock or thermal transfer from WB to IHS.
May need to solder my waterblock to IHS for 80W/M*K instead of 2-4 W/M*K of paste:rofl:.
At one point, I thought maybe my i950 had bad solder attachment of IHS, but comparing TDP to TDP, temps are similar, this chip is simply pulling more watts given the exact same settings, and hence putting out more heat.
Running this thing at 4500 to 4600 you can easily get into 300+W load if vcore is high enough, so definitely using biggest rad, best WB, best fans possible within ur noise limits, to fight for every degree helps.
wondering which fans could I use to improve a bit more I have the flex F's now
nice, thanks a lot for this info man. So crazy how to CPU's at the same settings can pull soo much more power heh? I7's need all the cooling you can get, they are monsters!
Hey Mario, if you want to keep it moderate, get six of these. 3 on each side for push and pull.
If you want more you can always jump over to some Deltas, but umm those things can make you go deaf :rofl:
http://www.performance-pcs.com/catal...ducts_id=22540
Thanks Chicken Patty and rge for clearing that up. So in the end if someone wanted the best temps on water, one would need to chill it seems. Lol, well I'll try with what I have and report later on. :)
chilling will def. help
here are my temps all day crunching, just plain water
http://img.techpowerup.org/090609/Capture269.jpg
I have tought about phase on my system:P
I hate everything that is warm:(
Quick run.. Batch 3845A935 , Specs refer to sig , 1.51 vcore.. :)
http://www.freeimagehosting.net/uploads/1a888331eb.jpg
NICE!! Keep pushin' it. :) Pics?
i'm curious to see how my custom watercooling will handle my I7 C0. I have a Mora Waterblock lying outside on the roof and i use a 5l bottle of destilled water as resevoir (also on the roof). And the Pump and the Rest is behind the wall where my PC is rested in another room, so yeah i really have a silent CPU i hear nuttin. I will use my Enzotech CPU Cooler on the I7.
Right now with my current 775 setup my water temp stays very cool. Right now I'm at 17,8 (meassured with aquastream XT). And if i put load on my CPU the water temp rises only about 5 degrees. At 4GHz the Q9550 reaches max temps of 42 with prime running. If i add my GTX 280 to it the water temp can rise about another 5 degrees but normaly its maxed out at 31 water temp.
Hope the I7 will put my water circle to the test.
we'll see. My setup is i think very good and im absolutly positive that i can keep my low temps. I have so much water in my circuit and such a big resevoir plus huge radiator that i think it can take it.
But heck i'm up for whatever comes. And if the I7 C0 is too hot for me i will directly put it on ebay and get a D0.
Elektro: D0 can be hotter then C0 just so you know, D0 does use less volt but some of they are made in hell i think:P
Too much D0 talk here now :p:
920 (3841A768) on air, Cooler Master Hyper212
http://www.edru.net/pictures/Screens...C/9sek_spi.jpg
I did a run @ 4620Mhz, but Paint.NET crashed when I tried to save the screenshot.
new PB for max validation, single stage, 1.49v , HT Enabled :D
http://www.freeimagehosting.net/uploads/4c38b29caa.jpg
Room temp was +- 22-24deg when i ran the test with ac vents blowing towards case. As sniper mentioned above in realtemps screenshot, the system was throttling 20 -21 keeping temps from shooting up too much. Mid 70's max temps is still pretty good though, i think cold ambient helps a lot.
Ambients are definitely key on i7, cant wait til winter when I can bench mine with cool ambients. Though using A/C vent works too, it can get you down to teens in C.
You can pretty much gauge ambients by looking at RT minimum which usually = idle temp. Load TDP varies significantly chip to chip, idle watts however is similar just because 10-20% difference at idle is still only a few watts.
Stock, idle, power savings, undervolted the best you can get is about 6-8C over ambient on i7 with water, or ambient is RT minimum temp - 6-8C on most.
At 4.2 and 1.25vcore you will be idling at ~25W, and gradient will be >12C over ambient, or ambient is at least 12-14C below RT minimum temp.
At 4.5 and 1.42Vcore idle will be at ~50W and core temps at least 16C over ambient, or ambient is at least 16C below RT minimum temp.
Does not work perfectly as above in all...but it will be reasonably close.
Gradient refers to the gradual temperature difference from hot core to the ambient (or IHS, etc). These relationships can be calculated by intel supplied formulas, or can be measured. The gradient is dependent on power, the higher the power, the higher the gradient or temp differential between hot core and ambient.
Here is thermal imaging of gradient from hot core to cooler area, see figure 2.
http://domino.watson.ibm.com/comm/re...nnovation.html
And here is a pic (from stanford paper) of sensor graph of pentium showing gradient or temp differential, in this case from hot spot to ambient (38C) on pentium at ~78W load.
http://img199.imageshack.us/img199/7...mpgradpent.jpg
Intel defines this gradient with a formula based on TDP. Higher watts, the higher the gradient or temperature difference between hot core and ambient.
At even 3-6 watts, undervolted, idle, underclocked, there will be still at least a 6-8C difference or gradient between hot core and ambient, for example 28-30C core would be ~ 22C ambient, given excellent cooling/water or very high end air/fans.
When you get up to ~45+ watts, for example core i7 D0 at idle, 1.4 vcore, 4.4+ghz, there will be a minimum gradient or temperature difference between hottest core and ambient of at least ~15-18C.
For example if I boot up at 4.5ghz, 1.4 vcore my average realtemp idle temperature of 4 cores is 44C. My ambient intake temps is 27C, so I have a 17C temperature difference (or gradient) from core to ambient, which is typical for 50 Watts. Others maybe ~10-20% difference, ie few C one way or another given similar cooling. But not possible to have for example an 6-8C temp difference between idle core and ambient (gradient core to ambient) for 40-50W.
The data sheet for the Core i7 CPUs shows this linear relationship. As the watts go up, so does the Tcase temperature which is the temperature measured at the center of your CPU. This graph is based on the OEM cooler. With after market cooling or water, the slope of the line will be different but the relationship will stay the same. More watts = higher temps.
Intel® Core™ i7 Processor Extreme Edition and Intel® Core™ i7 Processor Datasheet, Volume 1
June 2009 p.73
http://img196.imageshack.us/img196/8...malprofile.png
When running a stress program like Prime 95 Small FFTs, the core temperature can be a good 20C beyond the Tcase temperature.
thanks guys. Now I understand exactly what you mean :D
so for example in below screen shot. THe average between all four cores is 42ºc. My ambient on the CPU right now is 29ºc. This means I have a gradient of 13ºc??? this is idle of course.
http://img.techpowerup.org/090613/Capture275.jpg
chicken patty, yep you got it, and that is typical ambient to core gradient at that OC.
And thanks unclewebb for the graph, makes it clearer.
The last 4 posts in this thread are just pure win.
These are some insane clocks. Is there a consensus on which boards provide the best results aside from the EVGA classified? It's not that I don't think that board would do a good job, it's just that it's a bit too expensive for my budget.
I've seen some great results with this board believe it or not. over 40k in vantage and dual gtx295's :up:
Only the CPU water cooled, everything else stock air cooling
not bad price either
http://www.newegg.com/Product/Produc...82E16813135229
this one too, seen pretty good results with, only three ram slots, but hey if you get 3x2gb ram sticks, you'll be fine
http://www.newegg.com/Product/Produc...82E16813186163