try one stick at a time, and Vccio is not Vdimm. It's the IMC voltage. You can try up to 1.21V

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-te...a-ud4-bios3.jpgHOWEVER, in this new screen:http://images.bit-te...a-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-te...a-ud4-bios6.jpg"Advanced Voltage Settings" is where I set DRAM voltage to 1.5v:http://images.bit-te...-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.

EDIT again: I re-read your post and saw that the pics. you posted was not your settings so I erased everything I wrote.

nm

Alain, remember this is not a Nehalem. Things are slightly different in SB. 1.40 Vtt (Vccio in SB Asus boards, not sure about GB) is supposed to be far too much. Not sure what's it's based on, but it's not advised to use more than 1.21V in SB

I've edited my post.

You guys need to keep in mind that OCCT has never been updated for SB so I would not trust anything it says as far as voltages and temperatures. Also I would not use it to stress test SB. The autor is working on release 4.0, but until it is released I would not use it for SB.

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.

Yeah, I guess I knew going into the UD4 it did not have cmos clear button but I didn't think I'd need it this badly... another fail for me LOL! Maybe I'll get a chance to redeem myself in 3 years LOL!What memory would you recommend? Initially I wanted the Mushkin redline cas 7:http://www.newegg.com/Product/Product.aspx?Item=N82E16820226178&cm_re=mushkin_ddr3-_-20-226-178-_-ProductAlso, I'm going to post in the Corsair forums, maybe a stick is bad... I've yet to run memtest. Plus they have a fairly easy rma policy, I'd love to stick with corsair, as I've always gone with them in the past.

You guys need to keep in mind that OCCT has never been updated for SB so I would not trust anything it says as far as voltages and temperatures. Also I would not use it to stress test SB. The autor is working on release 4.0, but until it is released I would not use it for SB.

Perhaps but I fail prime95 in seconds too with 1866 set... so something is wrong.

The Mushkins you linked would be perfect or as you said, you could rma your corsair's. I would be inclined to just try a different memory altogether (not necessarily different brand).

The Mushkins you linked would be perfect or as you said, you could rma your corsair's. I would be inclined to just try a different memory altogether (not necessarily different brand).

I would be too, but perhaps after an RMA. When I get home today I'm just going to set all the settings per the specifications on the RAM, and run the OCCT/P95 again, and see what happens. Heck maybe I'll even get memtest boot cd up and running.What's the definition of insanity again? :Shocked:Oh, one more quick question, if I clear CMOS will I need to reflash my BIOS again?And one more thing before I go back to work: I'm running 30fps locked at my payware JFK airport scenery with my Duke, most scenery on high, but no AI (I never AI anyyway fly on vatsim). Would it really be so detrimental in FSX to run 1333 instead of 1866? What if I can overclock to 4GHz+ on 1333mhz? Will I even notice a difference with ram set 1333 vs 1866 anyway?

No, 1333 isn't really going to make a huge difference - but you bought nice memory, so why settle for anything less? Clear CMOS shouldn't reflash your BIOS if you successfully flashed the backup BIOS. Make sure you do that soon to if you haven't already. I don't think any of your problems pertain to that, but you never know. The Gigabyte boards just seem more stable when you have both the bios and the backup bios on the same version.

No, 1333 isn't really going to make a huge difference - but you bought nice memory, so why settle for anything less? Clear CMOS shouldn't reflash your BIOS if you successfully flashed the backup BIOS. Make sure you do that soon to if you haven't already. I don't think any of your problems pertain to that, but you never know.

I don't want to settle for less but for a guy with a brand new baby it's hard to put forth so much effort for an entertainment hobby. I better try to flash that backup bios first thing when I get home. I'll have to try a PS/2 kb instead as well...I swear I was pressing ALT+F12, but it just brought me to the boot option (F12 is key for that).

again, set your Vtt to 1.21V if it still fails to pass Prime, try 1 stick at a time to see if one is faulty

again, set your Vtt to 1.21V if it still fails to pass Prime, try 1 stick at a time to see if one is faulty

Wilco.

I've been spending all my breaks reading up on this stuff.Looking at other well-known hardware sites it seems other users are having troubles running at 1866 with these new revisioned SB boards. Though Corsair states over and over this RAM will work at 9-10-9-27 1.5v 1866mhz, I'm just not seeing it. Not sure how much time I'll have tonight to swap a stick out, or run memtest... first priority is to get that dang backup bios flashed. Also, I think I know what may have caused my initial boot to fail a few days ago. I changed the command rate to 1T, and that's when the bios reverted to the backup bios. So the PC will boot and load Windows (and FSX works) with 1866 and 2T but I can't pass stress tests. With 1333 and 2T I can pass stress tests. I hope it's a RAM issue and not a flaky board issue. I'll be out of town for a few days, so I really do appreciate everyone's help in trying to get me up and running!!!Thank you! :Hug:

Maybe try 1600 7-8-7-24. Try 2T at first and if that's successful, then see if it will do 1T.

I don't want to settle for less but for a guy with a brand new baby it's hard to put forth so much effort for an entertainment hobby. I better try to flash that backup bios first thing when I get home. I'll have to try a PS/2 kb instead as well...I swear I was pressing ALT+F12, but it just brought me to the boot option (F12 is key for that).

I found that turning the PSU off for 10-seconds then the Alt +F12 thing works. Same as the delete button for me too to access bios. Also the right Alt +F12 thing works sometimes.