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Cranky 7x multi?, or impossible. - Page 4

post #31 of 42
Thread Starter 
Ok, thanks for the info. Now, back to my problem. Why does this happen only with the 7x multiplier? I can not figure out why.

Here is my situation now.

I recently found out that running my RAM in sync mode is the best for my setup. Therefore, I want the highest FSB possible to make my RAM run at a good speed sync'd

Sooo, I want the multiplier to run at 7x with an FSB of 1715 (3.0ghz) Then my RAM will be overclocked to 858 (easy oc, already tested).

But for some reason I just can't set any FSB over 1473 with the dang 7x multi, which is what I need for my overclock!

I've tried everything I can think of, and everytime I change FSB to go above 1473 with the 7x multi, the system goes into safe mode, and reverts the fsb to 200 which is stock.

The weird thing is though, any other multiplier I use can go well above that FSB and it won't boot into safe mode. Is there an option to turn the safe mode off or something, is it windows that is doing this?

What the heck is going on, can anyone explain?
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post #32 of 42
Quote:
But for some reason I just can't set any FSB over 1473 with the dang 7x multi, which is what I need for my overclock!
Well..correct me if I am wrong, but isnt the default multi for that cpu 10x?

So heres how i see it: FSB = 1473mhz..or 368mhz base clock, + cpu multi lowered by 3x from default value = NB speed of ~500mhz or 2ghz effective speed.

Now, while 2ghz isnt really that high for a 965chipset..it could be the reason for the instability. If others have been successful with OC's up to 500mhz FSB without a lowered multi, then it might be possible for you to run the NB @ 500mhz for your 368mhz FSB...If you havent already, try upping your NBv a little.

As for that mobo, being a Nvidia chipset, I do not know if the HTT speed for the SB is lined to the action of the multi..in other words, the SB speed could be reacting to the multi drop in the same fashion as the NB, and increasing its speed too...thats just speculation on my part though, but it would sure explain a few things.
post #33 of 42
Thread Starter 
So wait, if thats bad, should I change these HT multipliers?

http://www.overclock.net/attachments...g?d=1183749022

check out the pic, if I lowered one, would it become stable again?
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post #34 of 42
cl3p20 is right. your processor has a high multi, which doesn't go hand in hand with a high FSB. lowering the multi puts more of a strain on your motherboard. try 300x10 with DDR2 800 and see if you like it.
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post #35 of 42
Thread Starter 
But why does it just do it with the 7x multiplier?

I can get the 6x up to above 1500 fsb? wouldnt that create a larger nbcc?
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post #36 of 42
Quote:
a high multi, which doesn't go hand in hand with a high FSB. lowering the multi puts more of a strain on your motherboard.
-> exactly ..try the 300/800 combo as mentioned.

Quote:
But why does it just do it with the 7x multiplier?
I can get the 6x up to above 1500 fsb? wouldnt that create a larger nbcc?
Yes it would..it could just be a characteristic of the NB speed/latency at that strap. When you are clocking the NB to the top-end of its strap, you will get the best performance, as a result of its speed vs. latency...but often times, these are also the areas, that are harder to maintain a stable system in.

You just may have 'found' a weak area or FSB hole..where the NB sucks..and either going beyond or below, is the only way to stabilize your OC. Its pretty common..but the characteristics are different, depending on chipset..etc.

ie- P5B strap, 400/401 problem..
post #37 of 42
Thread Starter 
Ok, I must be getting a little annoying to you guys now...

But why would I want to do that if I could at least use an 8x multiplier to get the higher FSB, plus I can overclock my RAM?
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post #38 of 42
You can still OC your RAM to 1200+mhz....below 400FSB.

Just use a different divider and a higher multi. There is more to a good OC than just FSB..like latency, divider, NB speed, voltage etc...A good 4:5 with those RAM around 333mhz..you'll be impressed.
post #39 of 42
you mean 400x8? that might be doable, but it wouldn't require you to overclock your memory. just make sure you keep an eye on your NB temp and do your stability testing.
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post #40 of 42
Thread Starter 
Ok, I'll try it... but I still don't really understand why lots of people lower their multipliers, and why I shouldn't.

Oh yeah, plus I think the 10x multiplier makes my CPU run hotter, like 2-3c which would put my load temps at the hottest point of the day at 55-58c.

Is that oK?

On a random note, I'm ocing my RAM now, how many memtest86's should it pass to consider it stable?
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