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

[eojinlim]

Does anyone have an answer to this. I thought it'd be easier to run the system at a 1:1 operation than a 4:5 operation.

 

[Roguestar]

So how high can you get your RAM? If it goes higher with 4:5 than 1:1 it means something is stopping your FSB from going higher.

 

[eojinlim]

I'm not sure. I'll have to see. Gonna restart. Will be back in a couple of minutes.

 

[eojinlim]

I can definitely say that the memory is absolutely not the problem....nor is the high temperatures of the northbridge limiting my overclock. If my memory could run at 500mhz at 4-4-4-12 timings on a 4:5 operation, there is something limiting my cpu from reaching 400fsb at 1:1...no clue. i dont see other ppl having the same problems either....unfortuantely.

 

[cmdrdredd]

400Mhz is probably too much strain on the system. Here's what I'd try. memory voltage 2.4v (testing here) CPU voltage 1.4 (testing here) and go up 2 notches from stock on the NB and SB voltage. Try booting at 400.

If it's no go, try 5-4-4-12 memory timings and see if it boots.

 

[Markfw]

People, I have TWO S3 boards using 500 FSB, and so does Duvie ! That board with proper memory and NB cooling WILL do 500 ! If 4 of them will do it, I am sure almost all of them will.

Settings:

CPU 1.45 vcore
NB +.2
vdim +.5 or .4 depending on memory

Active cooling on NB

 

[eojinlim]

So what would you advise me doing mark? Like I know I'm missing something here...I've got the memory, i've got the board and i have the right stepping e6400.

i just dont understand why id manage to run 400fsb on a 4:5 divider for my e6400 and fail to boot at 400fsb on a 1:1 divider.

I also placed a huge a$$ fan in front of my heatsink and provided more than enougg cooling. i knew the temperatures werent a problem for my northbridge when it didnt feel hot to the touch at all....it was rather mildly warm when i placed the fan and attempted the overclock.

anyone hav an ysuggestions...cuz im about to just give this board up and try something else.

 

[eojinlim]

what would be defined as proper cooling? if i didnt have proper cooling, what would happen? would the system start booting up and then shut down and reboot on a loop?

 

[Duvie]

What bios are you running?

Are you manually setting those ram timings or is it set to auto and you reading them in cpu_z???

 

[eojinlim]

They have been manually set.

I'm running the latest BIOS..F6

 

[Duvie]

So if it does cas 4-4-4-12 at 500 or 1000ddr2, then what cas timings have you tried at 400 or 800ddr2???

Sounds likes a compatability issue..

I have never experienced an FSB wall but have you tried like 401 or any fsb past 400 with a 1:1?

 

[eojinlim]

the fan controls are disabled. and thus QST has been disabled as wel.

 

[eojinlim]

Here's my "Overclocking Log"
1) 4-4-4-10 380x8 (1:1) = 3.040Ghz Orthos Stable, Memtest Stable
2) 5-5-5-15 400x8 (1:1) System boots up on loop, unsuccessful OC
3) 5-5-5-15 400x8 (4:5, where memory is working at 500mhz) = 3.2ghz Orthos Stable, Memtest Stable
4) 5-5-5-15 407x8 (1:1) unsuccessful OC

A compatibility issue between what two parts? I'm using the Crucial 10th Anniversary Edition on S3 Board, e6400 cpu.

 

[Duvie]

Originally posted by: eojinlim
the fan controls are disabled. and thus QST has been disabled as wel.

huh? How does that answer my question?

 

[eojinlim]

Sorry, I put that reply up before I saw your other post lol.

 

[Duvie]

All manual voltage settings as well?

 

[eojinlim]

All manual settings.
I've upped the DDR2 Overvoltage to +0.6 (for 2.4v total)
I've upped MCH Voltage to +0.2 (for total of 1.65v)
I've upped vcore to 1.45v

I've also changed the PCI-E Frequency to 100.

To set manual settings, I would need to press ctrl+f1 and then go to the memory settings and set to manual right? cuz thats what i did...

 

[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.

 

[eojinlim]

So I should gradually up my FSB, nice and slow?

 

[eojinlim]

I've literally upped the FSB mhz by mhz, and it stops booting at 384. However, at 383mhz FSB, it's perfectly stable.

 

[eojinlim]

It appears that my system, can reach 3200mhz OC on every divider but the 1:1.....does this have anything to do with some sort of on-die memory controller on the cpu?

 

[cmdrdredd]

Originally posted by: eojinlim
Here's my "Overclocking Log"
1) 4-4-4-10 380x8 (1:1) = 3.040Ghz Orthos Stable, Memtest Stable
2) 5-5-5-15 400x8 (1:1) System boots up on loop, unsuccessful OC
3) 5-5-5-15 400x8 (4:5, where memory is working at 500mhz) = 3.2ghz Orthos Stable, Memtest Stable
4) 5-5-5-15 407x8 (1:1) unsuccessful OC

A compatibility issue between what two parts? I'm using the Crucial 10th Anniversary Edition on S3 Board, e6400 cpu.

The DS3 BIOS had issues with Micron D9 based memory and maybe you're seeing something similar. Look at the highlighted speed you posted above...This is FASTER than 1:1 anyway. Also try 5-4-4-12 and I can just about guarantee the Crucial will do that. You should just run 4:5 as it's ALWAYS better with a C2D to have high memory speed vs timings and slower speed.

 

[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?

 

[eojinlim]

Originally posted by: cmdrdredd

Originally posted by: eojinlim
Here's my "Overclocking Log"
1) 4-4-4-10 380x8 (1:1) = 3.040Ghz Orthos Stable, Memtest Stable
2) 5-5-5-15 400x8 (1:1) System boots up on loop, unsuccessful OC
3) 5-5-5-15 400x8 (4:5, where memory is working at 500mhz) = 3.2ghz Orthos Stable, Memtest Stable
4) 5-5-5-15 407x8 (1:1) unsuccessful OC

A compatibility issue between what two parts? I'm using the Crucial 10th Anniversary Edition on S3 Board, e6400 cpu.

The DS3 BIOS had issues with Micron D9 based memory and maybe you're seeing something similar. Look at the highlighted speed you posted above...This is FASTER than 1:1 anyway. Also try 5-4-4-12 and I can just about guarantee the Crucial will do that. You should just run 4:5 as it's ALWAYS better with a C2D to have high memory speed vs timings and slower speed.

What did you mean that it's faster than 1:1? If it didn't work at loosened timings such as 5-5-5-15, would changing them to 5-4-4-12 allow me to break the 380fsb wall (at 1:1 operation) for my S3 motherboard? I'll give it a shot.

Well, I've been trying to run 5-5-5-15 400FSB at a 1:1 operation, but it doesnt work.

 

[cmdrdredd]

Originally posted by: eojinlim

Originally posted by: cmdrdredd

Originally posted by: eojinlim
Here's my "Overclocking Log"
1) 4-4-4-10 380x8 (1:1) = 3.040Ghz Orthos Stable, Memtest Stable
2) 5-5-5-15 400x8 (1:1) System boots up on loop, unsuccessful OC
3) 5-5-5-15 400x8 (4:5, where memory is working at 500mhz) = 3.2ghz Orthos Stable, Memtest Stable
4) 5-5-5-15 407x8 (1:1) unsuccessful OC

A compatibility issue between what two parts? I'm using the Crucial 10th Anniversary Edition on S3 Board, e6400 cpu.

The DS3 BIOS had issues with Micron D9 based memory and maybe you're seeing something similar. Look at the highlighted speed you posted above...This is FASTER than 1:1 anyway. Also try 5-4-4-12 and I can just about guarantee the Crucial will do that. You should just run 4:5 as it's ALWAYS better with a C2D to have high memory speed vs timings and slower speed.

What did you mean that it's faster than 1:1? If it didn't work at loosened timings such as 5-5-5-15, would changing them to 5-4-4-12 allow me to break the 380fsb wall (at 1:1 operation) for my S3 motherboard? I'll give it a shot.

Well, I've been trying to run 5-5-5-15 400FSB at a 1:1 operation, but it doesnt work.

1:1 memory speed is SLOWER THAN 4:5. Why do you insist on running 1:1 at 400Mhz? You're not running a 680i where you can run 4-4-4-8-1T at 800Mhz. You should always go for higher actual Mhz instead.

If 4:5 works at 400Mhz just go with that.