Originally Posted by megabitez
ya but now i cant even get it pass 2.45. it will freeze during post or just keep reseting on its own now. i have NO idea what settings i used i tried backtracking all the sites i went to and i cant get it =*( any idea on how to get it back in that area?
Yeah, you are experiencing a FSB Hole. This effects all 600 series NVIDIA chipsets. Go to the 680i thread linked below in my sig and see on the first or second page I have a post on the FSB hole.
Or you can check out this thread:
How to Overclock NVIDIA 600 series chipsets past their OC wall (AKA FSB Hole)
This info is in my 680i overclocking sticky
. However, since there are so many NVIDIA motherboard owners out there that are unaware of this, I decided to post this as it's own thread.
I found that these boards have a "FSB Hole". What I mean by FSB hole is that at a certain FSB, no matter how much vcore I gave the CPU, it would not boot stable, or sometimes not at all. At 390+ FSB (up to 410) I could not boot with 1.55 vcore. But when I set FSB to 411 and up, I was able to boot and run OCCT for over 3 hrs stable. I eventually reached 1.4 vcore at 3.7GHz. I have also found that no two boards will necessarily have the same FSB Hole, and bios updates can even move them to different FSB frequencies.
I would suggest lowering your multi to find your max FSB you can post at.
I discovered I had a FSB hole with my motherboard. I couldnt OC FSB from 395 - 408, but at 411 FSB I can run OCCT stable. Running 3.705GHz at 1.4v. My ambient right now is 26Â°C, my idle is 33/36Â° and load is 52/54Â°C.
Processor Model: E6600
CPU Clock Speed: 3705MHz
CPU Bus Speed: 411.67
CPU Multiplier Setting: x 9
CPU Core Model: Core 2 Duo
CPU week/stepping: L649G979
CPU Voltage: 1.4v (no vdroop)
Motherboard: EVGA 680i SLI A1
Memory: G.Skill CL4D6400-2GBPK 4-4-4-12 2T
Cooling: Swiftech Sys, Apogee GT & NB cooler
CPU FSB: 1.4v
SuperPI result (1M): 14.655s
RPIJG couldnt post at 400 FSB, he was limited at 3.3GHz. Now he is running 3.5GHz (437.5 x 8) at 1.44v.
Originally Posted by RPIJG
Both of you get +REP for that, I dropped the multi to x7 pushed the FSB up to 1700MHz and everything seems stable now. Now back to raising the CPU clock
Nate911 couldnt get past 3.15GHz (350 FSB x 9). Now he is running 3.4GHz (425 FSB x 8) with 1.34v.
Originally Posted by nate911
Ok I got it now! My FSB Hole is between 380 (1520) and 384 (1536). I'm running at 1537 2 notches below 1.35.
Will post here as I get higher, I'm probably nearly my limit though because of temps. :/ Even though the limit of 60C, I really don't want to go past 55C; that's what I'm at now.
EDIT: Wow, im stupid. I turned down the FSB and SPP to 1.2 and when it tried to boot it made staticy sounds... Oh well lol..
Anyways, I'm basically at my OC limit I think, I maybe can get a few more Mhz, it's just the temperatures getting close to 60. Thanks for the help guys! REP+
Gauvenator has a 650i board and was stuck at 2.14GHz (306.5 FSB x 7). At the moment he is at 2.24GHz.
Originally Posted by Gauvenator
It looks like it was an FSB hole. I upped the vcore .125, and tried adding 30 mhz (instead of 20) and it posted and is stable.
Thank you all so much! I will bear in mind your other tips for future reference.
Cyphear has an ASUS P5N32-E SLI based on the 680i chipset. He could only OC his E6300 to 2.62GHz. Now he is booting stable at 2.94GHz with 1.4v and still climbing. He actually had a 100MHz FSB hole!
Originally Posted by Cyphear
WOOHOO! I just took it up to 1660 QDR FSB and it booted! I'm at 2.94Ghz now at 1.4v Vcore (which is probably a little more than is actually needed). It wouldn't post before and it seems pretty damn stable so far. Thanks!!!
Satchmo1972 was only able to hit 3.0GHz with a 338 FSB, but after jumping to 400 FSB, he is running at 3.6GHz.
Originally Posted by Satchmo1972
Thank you kind sir for the VERY helpful advice at which I'm now at 3.6ghz thanks to you my friend!
Limes found his FSB Hole at 380. He was stuck at 3.0GHz, but now he is running 425 FSB at 3.4GHz and still has more headroom to go higher.
Originally Posted by Limes
It was an FSB hole and with eric's help I reached 3.4 Ghz.
Temps are 27 and 33 idle.
Super PI Calculation is 15.500s