Timings

[scotty365]

Ok - done as you say but mem timings had to be set on auto to get post.
Cant boot in at 1000mhz (can still try to up the NBv yet) had to reset CMOS -corrupt bios? (have to keep removing GFX card to do this!!!!)
Can boot in at 960mhz 5:6 no probs
All voltages are on auto atm except cpu and ram
FSB is 400 x8 multi

 

[Big.Wayne]

mem timings had to be set on auto to get post

Opps yeah should have mentioned that!

Cant boot in at 1000mhz (can still try to up the NBv yet)

Change that FSB (Bsel) To Northbridge Latch up from [FSB 1066] to [FSB 1333], that should then give you the option to change the memory up to DDR2-1066 [8:5] while running a 400MHz-FSB hopefully!

The [8:5] memory-multiplier is normally used at 333MHz-FSB for DDR2-1066 memory while the [4:3] memory-multiplier is normally used at 400MHz-FSB for DDR2-1066, doesn't really matter which you end up with except the 333MHz-Strap (or latch) will be slightly faster . . . although forcing it with the latch and boosting the real FSB up to 400MHz will strain it . . . maybe needing a touch more vNB is [Auto] doesn't sort it out!

had to reset CMOS -corrupt bios? (have to keep removing GFX card to do this!!!!)

That sounds a pain? . . . doesn't your board feature an *auto* recovery function? . . . on an ASUS board all I need do once the machine has failed to POST is switch it off at the PSU (or mains) for a few seconds then when the board is powered next it resets itself back to the last known good settings?

Seems like a good board you have there so I would be suprised if it didn't have an Auto recover feature of some sort?

FSB is 400 x8 multi

Memory at DDR2-1066 as mentioned above!

 

[scotty365]

I dont have the 400FSB 1066 divider the nearest is 1000 and even with the NBv bumped right up it wont boot (it does post though). Seems this board isn't liking this combination of RAM at high FSBs, even with the multi dropped right down it still wont boot.

 

[Big.Wayne]

I dont have the 400FSB 1066 divider the nearest is 1000 and even with the NBv bumped right up it wont boot (it does post though)

Strange? I thought all Intel® P45 Express motherboards would have had the [4:3] Memory Multiplier?

Have you tried playing with the FSB (Bsel) To Northbridge Latch setting? is that on [Auto] or? . . . on an ASUS board is a similar FSB-Strap setting is left on [Auto] it will change itself based on what DDR2-Frequency you select . . . and it does show you a big list of possible Memory Multipliers . . hmm

Seems this board isn't liking this combination of RAM at high FSBs, even with the multi dropped right down it still wont boot.

Which multi are you referring too? Memory or CPU?

If CPU then a choosing any multiplier other than native places more strain on the NB chip, your chips native multi is [x9] so selecting [x8] is a bit harder on the NB, [x7] harder still and [x6] is the most strenuous of them all!

Both a reduced CPU multi combined with fast memory settings all hits the northbridge hard, if in doubt either restore the CPU multi to native [x9] or blast the vNB juice up!

 

[Big.Wayne]

I'm not sure if this will help with the FSB troubles you are having but the last voltage in that list is a good one to bolster a CPU at its getting near its maximum overclock, normally on [Auto] it's ok but sometimes you need to manually switch it up . . .

CPU PLL Voltage

What's it on atm?

Also are all the GTL ref voltage controls on [Auto]?

 

[scotty365]

CPU PLL is 1.6v (1.5v-1.8v)
GTL ref has never been touched core #1 0.63xVTT core#2 0.67xVTT. MCH [Auto]. (I did have a little tinker and got the system prime stable at 3.5Ghz!! but set them back again for now.
I'm doing a bit of testing raising the FSB slowly on a x8 multi. I'm trying to see where the mem drops out and raise the NBv to try and bring it back. (I saw a overclock that raised the NBv very high, the figures go yellow then red the higher they go, these were into the red with a similar clock as mine with air cooling and normal NB heatsinks. Maybe I need to give it more juice but I cant afford to bust my MB.

 

[Big.Wayne]

Hey Scotty,

well I reckon your rolling now and we have covered the basics of getting your memory rocking at high speeds so I think its time to get this thread wrapped up!

I've got loads to get sorted over the next few weeks so my forum time will be limited, I'm sure you still got heaps of questions but feel free to make a new thread in the relevant sections and I'm sure you will get some more help!

It's been a pleasure helping you out and hopefully run into you again, overclocking can be a fun past-time but it doesn't always get the bills paid!

Laters!

 

[scotty365]

Of course Wayne - it has gone on for a good while! I've learned a lot from our exchange (shame its not constructive enough for an informative thread!!). You have been a massive help and I appreciate all the time you've given me.
Many respects for your input and no doubt I'll be in posting soon!


Cheers Wayne you've been a star dude