Is this whats causing my system to hang?

When I ran memtest I ran the ram at x8. But surely if it was to do with voltages then Prime, OCCT, and LinX would have failed at some point, but they didn't?

The thing I can't figure is, how would playing a flash video be linked to the ram multiplier? What I might do tonight is, uninstall all program from within control panel and see if that has any effect, if not I will try bios F7
 
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Ok what about, clear cmos, have everything at default settings and try it with that? If that works it has to do with your overclocking settings and you can rule out a hardware fault.

Then try overclocking again in little steps (maybe even memory async) and the minute it starts freezing adjust different bios settings to see if you can get it stable again.
 
i have the same problem with the exact same setup, i have tried several differant options in the bios, i can only get a stable overclock with easy tune...lol

The guys at ocuk have sent me several different bios setups, but my memory keeps freezing my system....

Let me know if you find a solution for yours?
 
Dysfunctional said:
i have the same problem with the exact same setup, i have tried several differant options in the bios, i can only get a stable overclock with easy tune...lol

The guys at ocuk have sent me several different bios setups, but my memory keeps freezing my system....

Let me know if you find a solution for yours?
Click to expand...

Really? That's interesting to know. As I am 99% sure it's the memory that's the problem. In which case there could be a dodge batch of ram from patriot maybe. I'm tempted if I can't get it to work just to buy different ram.

Dysfunctional, what are your memory settings in bios including voltage, also what bios version are you on?
 
I've tried, the standard rated by patriot 9.9.9.24.2/9.9.9.28.2 on 1.64\1.66 and i 've tried 8.8.8.24.2 as in test such as

http://benchmarkreviews.com/index.p...sk=view&id=275&Itemid=67&limit=1&limitstart=5

But no cigar... Every configuration I have tried always boils down to the memory failing, if i use the settings set by ocuk when i got the board, I literally start prime 95 and the system either freezes or restarts?
 
I'm on bios F7, I have read that some people are having some success with F9 beta. For some unknown reason more 64bit vista users are getting this on the forums I've read than win 7 users...dunno if that could play any part...

With easy tune running at the moment the system is stable with memory at 8.8.8.24.2 on 1.584v...

Please let me know if you find a solution as i can't see why other users with the exact same setup can easily hit 4.0-4.2ghz...
 
Remember lettuce, the mem controller is on the CPU die, so it might not be your RAM that is dodgy, it could very well be your processor that has a weak IMC.

Lots of people say that these recent batches of i920's have got much weaker IMC's compared to the earlier batches.

About Memtest, you really need to leave it running for more than just one pass, the best way to use it is to just install one DIMM at a time, and then let memtest run on each stick for say 10 to 20 passes with stock timings and frequency, this way you can figure out whether you have a dodgy stick of RAM that is causing these problems.

@Dysfunctional, why aren't you using 1.65v for your vDIMM?
 
DavyBoy said:
Remember lettuce, the mem controller is on the CPU die, so it might not be your RAM that is dodgy, it could very well be your processor that has a weak IMC.

Lots of people say that these recent batches of i920's have got much weaker IMC's compared to the earlier batches.
Click to expand...

So what can i do about a weak IMC??
 
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DavyBoy said:
About Memtest, you really need to leave it running for more than just one pass, the best way to use it is to just install one DIMM at a time, and then let memtest run on each stick for say 10 to 20 passes with stock timings and frequency, this way you can figure out whether you have a dodgy stick of RAM that is causing these problems.
Click to expand...

Right today i managed to test 2 sticks (1 at a time) for 16 passes each with memtest 3.5, both sticks passed 16 passes with no errors, with my OC BIOS settings. I then tried just 1 stick of ram and played a flash video and the system crashed...once again! I will try the last stick of ram tomorrow with memtest, but i dont think theres much point as my PC crashed with just 1 stick on ram in my system and that stick passed 16 passes of memtest!!

I just cant see how a feeble flash video can cause my system to hang/crash when i have memory frequency at x8, but then fine at x6 speed. I would understand if my system wasnt stable when priming, OCCT'in, or LinX'in, but it is!!!??
 
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This sounds like some kinda software issue..

What video are you trying to play out of curiousity?

If your system is passing Prime, OCCT and LinX I would say it's stable personally.

Does it do everything else you want it to do, except for this one video?
 
I'm still placing bets on the cpu. I believe that the crashes when idle are a result of load line calibration feeding the cpu too little voltage at idle. Increasing vcore should have remedied this, I'm a little thrown as to why it hasn't.

However, the results above indicate an inadequate imc on the processor. Either you're going to need to feed it more voltage, or accept that your ram isn't going to run at cl 8. However, again you've tried more qpi voltage.

I personally think you should overclock from scratch with load line calibration off. Failing that, drop clock speed until the crashes become non-reproducible. I think it'll bluescreen if you repeatedly start and stop prime 95, say every 5 seconds or so, as it's changing voltage across either the core or the qpi which is the issue. This may help in judging when it is no longer crashing.

Let this be a lesson to everyone who thinks prime/ibt is all you need to be stable...

edit: I suspect that load line calibration affects the qpi voltage as well as vcore: it is dropping too low at idle, so dropping the qpi voltage below what is required. Specifically the fluctuations in qpi voltage being the source of the problem. Beyond this I also have suspicions that the problem will go away if you turn turbo off. I have no sources for the information included in this edit, but turning off turbo and llc is definitely a good diagnostic step regardless. Good luck
 
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Its seems to do it with what ever flash video i watch, yet (i think, will try in a minute) i can watch a video through Windows media player and it will be fine. As i have said, i have done a fresh install and the only things that have been installed is my gfx drives (have tried without gfx drivers and still crashes) and whatever windows update installs, and still get crashes. If it is LLC related im am able to type out this message fine without any crashes, yet if i play a flash video i can get the system to crash within a few minutes, surely playing a flash video would put slightly more stress on the pc than type this message so why hasnt it crashed yet.

Things im going to try to are, test the last stick of ram, disable LLC, change the gfx card, try BIOS version F7, throw PC out the window!!!

EDIT: can cross LLC of the list, disabled it, and played a different flash vid and crashed with 15 seconds, with a slight sound stutter and then reset. I didnt think LLC would help as, atm im stable (with Prime etc) at vocre 1.281 and QPI 1.295, and have boosted vocre to 1.351 and qpi to 1.335, and i still got the carshes, so that suggests to me it isnt voltage related. One think i have noticed is that everytime my system carshes i have to reinstall flash player 10 plug-in for the browser, dont know if thats of relevences or not. Going to try different gfx card now
 
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Well i thought i just found the problem. Tried my old 7600GT card, and i played a different flash video, it played the whole 5 minutes of it, then i tried the usual flash video and it crashed on it. I then restarted the PC and played the first flash video again, that played the whole 5 minutes before, but this time it crashed after 50 seconds with stuttering sound, so must have been a fluke before!? Will now try a different mobo BIOS
 
No, i havent tried that, but would changing the memory freq multiliper from x8 or x6 be linked to the PCI-E slot at all??

Ok i flashed to BIOS version F7, setup the same OC settings i had on F9e BIOS, and the flas video crashed within 50 seconds. I then went into bios and upped the voltage to:

Vcore 1.4000!!!!!
QPI 1.335!!!

So pritty much on the limit of safety for the voltages, and the flash video still damn well crashed, so it is 99.9999999% not a voltage problem, well for the CPU anyway!. Would upping the IOH voltage have any effect, currently on 1.14.

If anything i would say that bios F7 is even more unstable in regards to this flash video, seems to crash a lot quicker than when on F9e bios. What is the maximum voltage i would get away with for the RAM without frying it, currently on 1.64, i think this might be where the problem lies??
 
Well it looks like its either a memory controller issue, or a decoding issue now.. i dont see why ram multiplier would directly affect a flash video..

With your multiplier set to x6, what does your ram frequency come out as?

try dropping your bclk while keeping your multiplier at x8 so it is the same frequency..

e.g. 1200mhz with x6 at 200bclk
change it to 150bclk with x8 multiplier and see if it crashes...
it'll drop your cpu speed, obviously.. but it'll keep your ram at what you know to be a stable frequency.. so if it fails its the multiplier, no?
At least then you can tell whether it's a frequency problem or a multiplier problem i guess...
 
Arachnae said:
Well it looks like its either a memory controller issue, or a decoding issue now.. i dont see why ram multiplier would directly affect a flash video..

With your multiplier set to x6, what does your ram frequency come out as?

try dropping your bclk while keeping your multiplier at x8 so it is the same frequency..

e.g. 1200mhz with x6 at 200bclk
change it to 150bclk with x8 multiplier and see if it crashes...
it'll drop your cpu speed, obviously.. but it'll keep your ram at what you know to be a stable frequency.. so if it fails its the multiplier, no?
At least then you can tell whether it's a frequency problem or a multiplier problem i guess...
Click to expand...

Ok at x6 memory freq the speed is 1146mhz!

I have done what you suggested:

placed the memory freq at x8
lowered Bclk to 143, which gives me a memory freq of 1144mhz so only 2mhz differences from 1146mhz
cpu at 2.86 (143x20)
Qpi link speed at 5.14Ghz

Will now try the flash video
 
Have you tried a clean OS install?

Do you have a spare HDD you could install your OS onto to see if the problems are still present?
 
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