Well I think it's probably useful for extreme OC under LN2 for having a very good stability with power and maybe split the load on two lane. You know I have 2x 8 pin on my Revolution, 2x 8pin on my mobo, I'm a man not a **** and have a new toy, what will I do? Connect both for sure Well you're maybe right. But if you have a look on the XS forum link I gave, some people with other mobos have some problems running i7 860 @ 4.2... maybe the dual power input provided on the EVGA mobo is one of the key differentiator for having better stability, I don't know, and I think it's maybe more dealing with extreme OC @ extreme votage. I maybe also have a good batch for the cpu, but I don't think so because minimum voltage for the stability is not one of the best I saw... And I don't play with LN2/Dice run so... I can't answer this question in doing a test.

Could you make a screen shot of the SPD tab from CPUZ latest version? The BSOD with your PC16000 memory may happen because of high voltage, because of memory heat, or because of wrong timing settings.

For example with my GT memory (PC16000 too with 8-8-8-24 timings @ 1,65V XMP profile), I had to setup manually the voltage to 1,65V into the bios. Otherwise this voltage was increasing during high load... over this 1,65V limit. Somer people say it doesn't matter, personnaly I don't want to take any risk @ high cpu OC.

Did you monitor the voltage of your Ram into e leet for example, or using CPUID Hardware Monitor?

I had bsod with Ram @ reference frequency when I tried to setup manually the tRFC @ 54. I mean: if you are using the XMP profile, this will reduce the multiplier to 18, you can increase it and setup the bios as described by Jacob but ... for me it's not stable with memory high load. What I did: memory is set on '' standard'' mode, not XMP, then target frequency to 1600MHz (and because the bclk of the CPU is set to 200, the memory frequency will be 2000MHz), and the timings are manually set up, I mean the 8-8-8-24 and the ratio 2T. For the rest: automatic mode. And Dram voltage manually set @ 1,65V to make sure I'll stay under 1,65V. I don't know why the XMP profile don't fit with the OC here, but if I setup manually the ram with reference timings, voltage and frequency, it's working fine.

Concerning the VCore during high loads, it depends on what setup I have. With the OC setup from Jacob, my VCore is setup @ 1,3625V into the Bios, and when loading the CPU with Prime95 for example, the monitoring displays maximum 1,40V Vcore, never more.

Then with my setup @ 3,5GHz with turbo on and cstates on... the Vcore voltage may vary from 1,11V to 1,51V. Depending on how many cores are active and how the turbo boosts. I mean on the screen shots on XS forum you can see that sometimes I have a x26 or x25 multiplier... this means that some cores are down (Cstate) and that I'm taking benefit of single or dual core with higher multiplier. i860 with 4 cores with turbo = max x22, 2 cores with turbo x25, 1 core with turbo x26. I guess that the 1,51V is reached when having only 1 core running with x51 multiplier (frequency displayed is around 4,3GHz...). But I'm not pretty sure, I have to investigate a bit more about this, I think this is because of Cstates, dynamically powering on or off cores depending on application load and requirements. With OCCT or Prim95, all cores are active, max multiplier is x22 and max Vcore is 1,42V something. But if I run Mozilla, or Première, then I have a x25 or x26 multiplier... this probably means that I have one core or two cores active, and the turbo mode with 1 or 2 cores will provide higer multiplier.

No I was talking about XMP because if you Ram has some XMP profile, you can have a look what are the kew settings for timing and then input them manually into the Bios. Put a screen shot of the SPD tab of CPU Z here this evening and we'll see what's inside. What is the model of your Ram, i mean the exact reference? That's what's important there, to know the reference timings, voltage and frequency. If you say this is PC16K memory, frequency is 2000MHz but for the rest, it depends on memory model.

Talking about temperatures: you have to monitor the temps during stress test to check if something is wrong. Why changing the cooler if the temps are good right? What do you use for monitoring voltage, temps?

the EVGA P55 has massiv problems with rams , i dont know why but it is so.

my dominators 1600 - cl8 - 1,65V are running only with overvoltage 1,68 V and timings 11-11-11-29  ......... no comment 

@Product Manager :  what is the problem  ? why the bios set the command rate to 1 , when the ram specifikation are 2 ?

Dyphen

my ram are this one

http://www.materiel.net/c...00_Trident_Series.html

look the table
it's a french website but u will can understand ^^

i use Core temp 0.99.5, Everest ultimate 5.03, and CPU-Z 1.52.2
i bought a new cpu cooler cause my temps going too high with the zalman.. and i saw some tests who show the performance of the noctua NH-D14

Ok let's try 9-9-9-27 timings :) Maybe the 9-9-9-24 is causing the issue. As said... my memory is normally 8-8-8-24-54-2T but trying to put the tRFC @ 54 manually, doesn't work, I let it on auto mode and this timing is set automatically @ 98. I don't really care about this but I asked the question in the Dominator thread on XS to have some support from Corsair's experts. Anyway i don't think you'll notice any difference in daily use, except if benchmarking but... hum...

Well you also monitor temps so what are the temps during load ? There is a good thread on xs about temps on Bloomfield and Clarkdale cpus. Some temps reported by Everest seems to be wrong, some recommend to use real temp for this purpose, latest version 3.4. Anyway try first the reference timing set for your memory. I was asking the question about temps because I had some G Skill memory some times ago, Ripjaws modules, pretty high temps during load, but the trident seems to have better heatsinks.

Materiel.net is a pretty good shop, I ordered lot of products by them, very satisfied. :)

Yes something else: did you try the XMP profile if your dominators has one, or did you try to set manually the correct reference timings and the right voltage into the Bios...?

Scaniris

Ok let's try 9-9-9-27 timings :) Maybe the 9-9-9-24 is causing the issue. As said... my memory is normally 8-8-8-24-54-2T but trying to put the tRFC @ 54 manually, doesn't work, I let it on auto mode and this timing is set automatically @ 98. I don't really care about this but I asked the question in the Dominator thread on XS to have some support from Corsair's experts. Anyway i don't think you'll notice any difference in daily use, except if benchmarking but... hum...

Well you also monitor temps so what are the temps during load ? There is a good thread on xs about temps on Bloomfield and Clarkdale cpus. Some temps reported by Everest seems to be wrong, some recommend to use real temp for this purpose, latest version 3.4. Anyway try first the reference timing set for your memory. I was asking the question about temps because I had some G Skill memory some times ago, Ripjaws modules, pretty high temps during load, but the trident seems to have better heatsinks.

Materiel.net is a pretty good shop, I ordered lot of products by them, very satisfied. :)

i will test this settings this evening.

u speak about temps but u speak about temps Ram or Cpu ? cause i dont monitor the temp of my Ram
otherwise coretemp for the cpu is pretty good

ps : u speak french ?

i sent you a PM Varun

but if i understand, 650w is enough for my comp then

I've replied to your private message (in French), Dyphen, but to ease things a bit, just tell me the precise model and make of your PSU and I'll tell you if you need to upgrade it or not. Also, tell me since when have you been using that particular PSU?

!!!!! OMG yeah pretty too hot. But with aircooling you may expect better temps that this! What's your Zalman model? Looks like bad thermal contact or... bad aircooler for OC purposes. Well with water I get a 68°C on Core 0 under Prime95 since some days (need some time to get some stable thermal measures after a rebuild). But immediately after installation, never got more than 76°C or something. Ok it's watercooling but in the same loop I have 4 gpus... so the results should be similar with a good air cooler on the CPU. I remember with the Zalman CNPS10X Extreme on my i7 750 @ 4GHz temps lower than 70°C.

This one? http://www.zalman.com/ENG...oduct_Read.asp?idx=356

If you want to stay on air cooling, you should try the NH-D14 or the Megahalems second edition. But it also depends on the case cooling... and on heat coming from other components. The global cooling concept will affect cpu temps.

If you want to get stable higher OC, you may consider watercooling as a good solution. If you have internal case temp issues, you can try a H50 from Corsair. The advantage is not really the water, but the ergonomy provided with the waterbased concept. You can attach the radiator on a fan output of your case, and put the hot air directly out of the case. 150W capacity... as good as other high air aircooling solutions based on passive heatsink + fans. But here the water allows a split of the cooler, waterblock on the CPU, and radiator directly to the ouput.

If you want to go a step further, watercooling DIY solutions are a real step forward in cooling. But... it's not really useful if noise level @ high load is not a problem for you, and if you don't need extreme OC in the real life applications.

Varun May be you should increase your fan speed and also check if you've installed the cooler correctly.

100% good idea! Check if the contact surface on the cooler side is clean and without scratches or something, clean it well with isopropylic alcohol (avoir citric oil based TIM removers except if cleaning afterward with iso alcohol based liquid), do the same on CPU side, put a small nut of TIM in the middle of the CPU because cores are located there, not all over the surface but in the middel, this is the critical part of the CPU there, and then put the cooler on the cpu, move it some degrees clock and counter clock wise, to remove evtl bubbles and then screw it very well, opposite sides together step my step. Check the motherboard eventual bending, don't screw too much, no backplate with air coolers like this so torque is limited. And the small backplate of the socket can't prevent some bending. And if you have some bending there, maybe the contact is not very good on the center of the CPU with the cooler.

Depending on TIM you are using... it's also recommended to change it each year, or months depending how hard you use your cpu ^^

i have a Cosmos S with 2 noctua FLX 120mm ( top + behind ), megaflow 200mm et the 120mm coolermaster in front of the case

As i explained to Scaniris in PM, i had some problems when i fixed my rad the first time, i had a big distance between temperatures..
then i re fixed the rad and it was good..

actually, my temps in idle are 36~38°C in game  never more than 70°C
my temps exceed only on OCCT.. hopefully
and as the " without vdroop " adjust the vcore during burn, it climb to 1.34~35

i will see with my new rad anyway lol
i would be fixed

InCoNNu_BE

It's true ... The sound comes from my PSU too (Seasonic 430W) so the "problem" it's not the eVGA. Thx a lot Scaniris

not sure ami HFRiens :D
cause i have the same problems , a kind of buzzing and i have a Corsair TX650w
then i think, it's the motherboard for me lol

@Scaniris