Is this a fluke or something seriously wrong with my 2500k?No OCing yet, I've only set my ram to 1866 mhz, and ram voltage to 1.5I just wanted to run the program to get a feel for current load temps, and it failed within 30 seconds of the stress test....Also, while looking at the graphs created by OCCT, it shows my vcore way up to like 1.4v.... I thought it was supposed to be at like 1.1 or something? Or is this just the speed step/turbo taking over?

Try the current version 3.10 if it still does it you have a problem. Don't worry about the voltage it is not reading it correctly. http://www.ocbase.com/perestroika_en/index.php?DownloadAlso you can pass OCCT and fail Prime95, OCCT is good for building heat to test cooling but I would run an hour or two of Prime95 to make sure I was stable. Make sure you use v266 or later. But you should pass OCCT without error first.

I guess I just suck at this because I got error on core #1 now...*sigh*

I guess I just suck at this because I got error on core #1 now...*sigh*

Make sure optimum settings are set in the bios.

I'm not familiar with OCCT whatsoever. I can't even think of something that would cause that... do you have any issues running prime95?on a side note, my computer stopped detecting any devices plugged into the Sata II ports this morning! So I moved my HDD over to a spare Sata III port and have not tried reconnecting it to the Sata II to see if it was a fluke event? Recall issue - probably so. No worries, it's a B2 board bought in January. Fry's told me they would have Gigabyte boards back in stock this week.

I'm not familiar with the SB but you may need a little more on the ram voltage to stay stable, it's hard to give advise without knowing the speed and timing of your memory.Make sure your memory is set in bios as per the manuf. spec. and like I said you may need a little more voltage assuming you are running some 2000MHz +.Also a screen shot of CPU-Z will not hurt.

Can I add that in my experience, OCCT has been unreliable for me. On one hand I was getting errors with OCCT, but none with Prime95 and everyday programs. On the other hand, OCCT doesn't get my temps as toasty warm as Prime95. I really love the presentation and look of OCCT but it has not been anything but head aches for me.

This is my exact RAMhttp://www.corsair.com/memory/vengeance/vengeance-8gb-dual-channel-ddr3-memory-kit-cmz8gx3m2a1866c9.htmlIn BIOS (which I just flashed to a newer one):DDR Vcore is auto at 1.5V (correct)I changed the mem multi to 18.66 (correct)I have the timings set correctly as 9-10-9-27Under auto, the cpu vcore looks pretty low, and I'm hoping it is the culprit here... last I checked it was like 1.05 or something...CPUz shots:Tomorrow I'll take pics of BIOS to see if you guys see anything wrong!

Can I add that in my experience, OCCT has been unreliable for me. On one hand I was getting errors with OCCT, but none with Prime95 and everyday programs. On the other hand, OCCT doesn't get my temps as toasty warm as Prime95. I really love the presentation and look of OCCT but it has not been anything but head aches for me.

What version of P95 do you recommend? Link?EDIT: Briefly ran Prime 95, error:"[sat Apr 02 22:25:53 2011]FATAL ERROR: Rounding was 0.5, expected less than 0.4Hardware failure detected, consult stress.txt file."

Enable XMP if you have not set the rams at 2T and let see.....right now you are at 1T.Make sure your timing is at 9-10-9-27 cause looking at CPU-Z you'r at 9-9-9-24 1T.

Enable XMP if you have not set the rams at 2T and let see.....right now you are at 1T.Make sure your timing is at 9-10-9-27 cause looking at CPU-Z you'r at 9-9-9-24 1T.

I know, it's weird, isn't it? In bios it shows 9 10 9 27 on one screen, but on the other is shows 9 9 9 24.Anyway, as a quick test, I dropped my ram back to 1333. Low and behold, OCCT ran fine for 10 min (then I stopped it), zero errors.... So does that mean my mobo doesn't like my ram? Or do I need to increase ddr voltage to greater than 1.5 while running 1866mhz?Also, I'm confused about vcore. According to this graph from OCCT it's at 1.4v under load? Isn't that much higher than the Intel spec'd 1.35v?Also, per this thread:http://www.tomshardware.com/forum/287442-30-mobosIt appears the board only handles 1333mhz ram anyway and anything above is considering ocing the ram? Some users say they had to increase the ddr voltage a bit to get stable at 1866 etc...Thoughts?I will get to the bottom of this GRRRRR!!!

If that Vcore is accurate, it's pretty high. That being said, OCCT's Vcore monitor in my experience has been dead on accurate compared to CPU-Z and Everest.Sometimes getting to the bottom of this kind of botched overclock (or no overclock :Just Kidding: ) ends up needing a cleared cmos and start from scratch... Just my .02BTW: Prime95 25.11 is my version, for what it's worth. I believe that's the latest.Edit: I lied. Latest is 26.5 build 3

Until CPU-Z gets fixed for the new Gigabyte B3 boards, your most reliable reading for vcore is probably easy tune 6, which can be downloaded from Gigabyte's website. Set LLC to enabled in your BIOS and compare the voltage reading from easy tune 6 to the voltage reading you specified in the BIOS. According to the table below, you will probably see that the voltage reading from easy tune 6 will be about 0.01v higher than what you specify in the BIOS. Also pay attention to how your voltage reading in easy tune 6 fluctuates between idle and load. Make sure it's not deviating dramatically.I don't mean to state the obvious, but make sure you have your memory installed in the correct memory slots. Check your motherboard manual to see if the preferable slots are 1 and 3 or 2 and 4. I wouldn't be surprised if you're just running into memory issues. As others have said, make sure you're running default timings and go ahead and feed them a little extra voltage while you're still figuring things out - perhaps 1.54v. For memory, I would always recommend manually specifying the speed, timings, command rate, and voltage - so 1866, 9-10-9-27, command rate = 1, and 1.54v all need to be explicity entered into the BIOS.Here's some BIOS settings I've prepared for you for 4.5GHz. If you want, try copying those settings and see if you still have problems.

If you keep getting errors with the memory at its rated voltage try gradually increasing the chip Vccio until they disappear. Dont exceed the maximum permitted volts.

If you keep getting errors with the memory at its rated voltage try gradually increasing the chip Vccio until they disappear. Dont exceed the maximum permitted volts.

Well quoted voltage is 1.5v straight from the Corsair site. The engineers must have made this stuff to sustain higher values, no? I certainly can't imagine them needing those monster heat spreaders while running 1333mhz @ 1.5v lol! If it runs at 1333, but not 1866, that would point to a RAM issue correct? They are installed on dimms 1 and 3 like normal. Perhaps a cmos reset would help but its a PITA on my board (now I wish I spent the extra60 bucks to get the reset cmos switch lol), not to mention I have to get my pc out from under the desk.. and pull out the video card... ugh! It might help, but not sure it would be worth it, considering I'll I've done is change the memory timings, ddr vcore, and memory multiplier. (And I know how to set them back to auto).I might need to have my hand held through this whole process of simply setting correct timings, cpu voltage, etc, because when I did it, in one bios screen it would show correct, in another it did not show the timings correctly. I'm at work right now, then I sleep, then I wake, then I go to work again for the midnight shift - so perhaps I'll post some pics later this evening...The last PC upgrade I did was about 3 years old, and I never had to touch the bios because the settings were automatically correct. So I'm not used to screwing around in there... I know for most of you this stuff is nothing, it's easy peasy, but I'm here to learn and I'm going to try to get this straightened out!edit:, dez posted a link to a GB overclocking page(which I've looked at before), and it has a lot of pics of my exact bios... (but not my settings obviously)Maybe I'm screwing something up here, in the first pic, it talks about "advanced frequency settings" You can set memory multiplier here which is where I set 18.66http://images.bit-tech.net/content_images/2011/01/how-to-overclock-the-intel-core-i5-2500k/ga-p67a-ud4-bios3.jpgHOWEVER, in this new screen:http://images.bit-tech.net/content_images/2011/01/how-to-overclock-the-intel-core-i5-2500k/ga-p67a-ud4-bios5.jpgYou can set what appears to be the same value??? Why would you set the same variable in two different screens? That's confusing.This next screen is the timing screen, and basically what I've used to set timings and command rate:http://images.bit-tech.net/content_images/2011/01/how-to-overclock-the-intel-core-i5-2500k/ga-p67a-ud4-bios6.jpg"Advanced Voltage Settings" is where I set DRAM voltage to 1.5v:http://images.bit-tech.net/content_images/2011/01/how-to-overclock-the-intel-core-i5-2500k/ga-p67a-ud4-bios10.jpgAm I not doing this correct?In a nutshell:1) If I set 18.66 as the mem mult (and all other settings are auto)I get crash in OCCT in 3 seconds2) If I set 13.33 " " I receive no crash.

I was not even aware the UD4 had a jumper instead of a cmos reset button. I will definately be sticking with the UD5 in that case... Perhaps you could create a cmos button - then you can place the button wherever you want it!Would it be too difficult for you to exchange your memory either for another set of the same or another set altogether? This all sounds like memory issues. Also, I agree that the memory multiplier and cpu multiplier are redundant settings in the Gigabyte BIOS. Just change it in one and it should be fine. Post your BIOS settings when you get a chance. But it sounds like you're doing things correctly.