Overclocked E8400 wont post

[jerran]

I'm having some issues with my overclocking process. I'm kinda new to it but have read a lot about overclocking the C2D's. I built the pc this weekend and immediately changed just the FSB to 400 and everything worked fine - ran Prime for 24 hours with no errors. I am in the process of trying to get to 4GHz but when changing the FSB to 410 it wont get pased the post and I need to clear the CMOS to get back into BIOS. I tried changing the cpu voltage but I still get stuck trying to post. I've also played with the memory voltage but that also fails. I've set the timings to 5-5-5-15 and tried them at auto - neither result helped. I'm thinking that I'm close but need some guidance as what to look at next to help get the post to complete. I can post a pic of the post later today but it see's the CPU and sees the 4G of memory but it doesn't seem to understand what kind of memory it is (if that makes sense).

Also is there a good read on when to change voltages or when not too - and when the north/south voltages might need to be changed?

Thanks,
Jer

 

[M1A]

I will not be much help for you but can only tell you I am at almost the same position as you. I did the same shortly after getting my system up I just kept everything at stock and took the FSB to 400 for a day things were good. Temps were low then went to try 500 no go and went down all the way to 410 and had to raise volts to get stable. I found after a week of playin I am still at 410 but stable. I am only slightly above rated speed after vdroop at 1.25v. I know others are really bumping volts but I want to be safe and pick something to run 24/7. If I get time this week I will experiment some but without raising voltage 410 might be where you are. Others that have had these for some weeks need to chime in. We may be missing some bios thing or something. I also think these guys are turning off speedstep because mine keeps defaulting back down to a 6 multiplier from the standard 9. I have my mem a auto and my Balistic are 4-4-4-12 and they show 5-5-5-18 with 2.2v.
Come on guys help jerran out!!!!!!!!!!!!!

 

[M1A]

Oh here is some info I was collecting.

Link or Overclocker FSB Rated fsb Multiplier Core Volts vDrop GHZ VID Ram Speed vdimm core 1 idle core 2 idle core 2 loal core 2 load Steppig Cooling 3Dmark
http://forums.anandtech.com/me...=2144251&enterthread=y 334 1366 9 1.112 3
http://forums.anandtech.com/me...=2144251&enterthread=y 400 1600 9 1.28 3.6
http://forums.anandtech.com/me...=2144251&enterthread=y 460 1840 9 1.4 4.14 1.1125 1.21 15c 34c 28c 34c
http://forums.anandtech.com/me...=2144251&enterthread=y 490 1963 9 4.41 980
http://forums.anandtech.com/me...=2144251&enterthread=y 450 1800 9 1.4125 1.375 4.05 17c 34c 24c 32c
http://www.xtremesystems.org/f...173909&highlight=e8397 500 2000 9 1.51 4.5
http://www.xtremesystems.org/f...173909&highlight=e8398 490 1963 9 1.416 52c 55c 63c 65c 6 CO air
http://www.xtremesystems.org/f...173909&highlight=e8399 556 2224 9 1.592 5.004 51c 6 CO ss
http://www.xtremesystems.org/f...173909&highlight=e8400 490 1963 9 1.464 4.41 34c 34c
http://www.xtremesystems.org/f...173909&highlight=e8401 489 1959 9 1.392 4.409 24c 24c
http://www.xtremesystems.org/f...173909&highlight=e8402 445 1780 8.5 1.28 4.005 1.112 63c 65c
http://www.xtremesystems.org/f...173909&highlight=e8403 450 1820 9 1.23575 4.05 58c 59c
http://www.xtremesystems.org/f...173909&highlight=e8404 470 1880 9 1.44 4.23 57c 59c
http://www.xtremesystems.org/f...173909&highlight=e8405 475 1900 9 1.2 4.275 60c 60c
http://www.ocforums.com/showthread.php?t=544212&page=3 380 1520 9 1.104 3.42
http://www.ocforums.com/showthread.php?t=544212&page=4 490 1960 9 1.512 4.41 1.0375 44c 44c
http://www.ocforums.com/showthread.php?t=544212&page=5 410 1640 9 1.264 1.225 3.69
http://www.ocforums.com/showthread.php?t=544212&page=6 422 1688 9 1.256 1.225 3.798
http://www.ocforums.com/showthread.php?t=544212&page=7 434 1736 9 1.256 1.225 3.906
http://www.ocforums.com/showthread.php?t=544212&page=8 446 1784 9 1.296 4.014
http://www.ocforums.com/showthread.php?t=544212&page=9 446 1784 9 1.328 4.014
http://www.ocforums.com/showthread.php?t=544212&page=10 460 1840 9 1.384 4.14
http://www.ocforums.com/showthread.php?t=544212&page=11 470 1879 9 1.424 4.229
http://www.ocforums.com/showthread.php?t=544212&page=12 485 1940 9 1.464 4.365
http://www.ocforums.com/showthread.php?t=544212&page=13 501 2004 9 1.552 4.508
http://www.ocforums.com/showthread.php?t=544212&page=14 488 9 1.54 1.48 4.325 43c 67c 11553
http://www.ocforums.com/showthread.php?t=544212&page=15 340 1360 9 1.168 3.06
http://www.ocforums.com/showthread.php?t=544212&page=16 460 1840 9 1.328 4.14 42c 42c





Mine 410 1640 9 1.35 1.25 3.7 1.02 43c 53c 42c 52c 12866

 

[M1A]

Well that did not import very good

 

[jerran]

Thanks for those links - I've come to the conclusion that it has to do with the memory and its timings or voltage. I'll play around tonight with those settings see what gives.

Jer