Why can I not Overclock e6400 on S3 mobo at 1:1 but I can do 4:5

[eojinlim]

oh, alright. The only reason is that I don't want to just run it at 3200ghz. I want to reach for an even higher overclock...if I wanted to settle for a 3200mhz overclock, regardless of divider, I would have bought some cheap 5-5-5-12 ddr2 800 memory...

 

[eojinlim]

OVERCLOCK SUCCESSFUL!!!! I just changed my FSB from 383mhz FSB (1:1) to 425mhz FSB and it booted up on the first time!!!!!! Absolutely amazing. Now I have an overclocked e6400 @ 3.4ghz with stable temps and 5-5-5-15 timings.

Does anyone know why I could not boot up at 384-407 but when I changed it to 425, it booted without problems? Would really like to know so that when someone else on the forum comes across the same problem I can give back to them what everyone on this forum has been trying to help me with....

Also, does anyone have a guide in lowering these temps or do I have to just lower them one timing at a time? (ie/ 5-5-5-15 --> 4-5-5-15 --> 4-4-5-15, etc)?

 

[JEDIYoda]

Originally posted by: eojinlim
OVERCLOCK SUCCESSFUL!!!! I just changed my FSB from 383mhz FSB (1:1) to 425mhz FSB and it booted up on the first time!!!!!! Absolutely amazing. Now I have an overclocked e6400 @ 3.4ghz with stable temps and 5-5-5-15 timings.

Does anyone know why I could not boot up at 384-407 but when I changed it to 425, it booted without problems? -- Divine Intervention!!


Would really like to know so that when someone else on the forum comes across the same problem I can give back to them what everyone on this forum has been trying to help me with....

Also, does anyone have a guide in lowering these temps or do I have to just lower them one timing at a time? (ie/ 5-5-5-15 --> 4-5-5-15 --> 4-4-5-15, etc)?

 

[eojinlim]

haha, guess i should say my prayers tonight lol

 

[Roguestar]

Haha, some people have a magical range at which it won't run but can get higher than that. I don't know what causes it but good for you now that you've gotten past it and are happy with your overclock 🙂.

 

[cmdrdredd]

Certain boards have random FSB "black holes" where nothing works, but above or below it is fine.

 

[imported_Lothar]

Originally posted by: cmdrdredd

Originally posted by: myocardia
Never run 400 with an S3 or DS3 (while testing, anyway). You're using the wrong memory strap at 400 FSB. Try 401 @ 4-4-4-12, and lower your vdimm to 2.1v or 2.2v.

lower memory voltage is not an issue. I'd leave 2.3v or 2.4v until you find out what works, then drop down.

Is the DS3 like the P5B in that you're on 1066 strap with tight timings at 400? or is it different?

I'd like to know as well because I'm getting confused.

On what specific motherboard is running FSB at 400 better than 401?
On what specific motherboard is running FSB at 401 better than 400?

People are just mentioning 400 or 401 all over the place.

 

[cmdrdredd]

Originally posted by: Lothar

Originally posted by: cmdrdredd

Originally posted by: myocardia
Never run 400 with an S3 or DS3 (while testing, anyway). You're using the wrong memory strap at 400 FSB. Try 401 @ 4-4-4-12, and lower your vdimm to 2.1v or 2.2v.

lower memory voltage is not an issue. I'd leave 2.3v or 2.4v until you find out what works, then drop down.

Is the DS3 like the P5B in that you're on 1066 strap with tight timings at 400? or is it different?

I'd like to know as well because I'm getting confused.

On what specific motherboard is running FSB at 400 better than 401?
On what specific motherboard is running FSB at 401 better than 400?

People are just mentioning 400 or 401 all over the place.

I know on the P5B that 400Mhz = 1066 strap and tight timings. occational instability. 401+ is 1333strap I think (maybe 1600) and loose timings for lower bandwidth in favor of stability again.