Sylvanas
Diamond Member
- Jan 20, 2004
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Originally posted by: apoppin
OK, i got 550 X2 back into my PC and "roughed in" at 3906 MHz still using the 15.5 multiplier (253x15.5)
- it was 'almost' stable at 3937 but failed Everest stability test after a few minutes and at 3921 MHz after 1/2 hour
core temps are excellent ... everest reports 30s C under load [hyper n212 with 1-120 mm fan super-glued to the cooler]
-can those low core temps be right?? Everest shows CPU as 46C [what is this temp different than the core?]
The CPU voltage is 1.4 v {+0.1v}; all other voltage is raised by the smallest possible increment except DDR2 which is at 2.1 v
i left HT link on "auto" [what width do i set?]; HT frequency is 2277 [x9]
NB frequency is x9 = 2277
Where do i start? Adjusting the multiplier and fine tuning my clocks - then NB OC?
- this is fun for my first AMD CPU
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Generally I find it easier to find the max possible Core frequency (3.9ghz in your case) and after that is established then go onto overclocking the NB / tweaking memory (I find low timings > high frequency memory- although this is dependent on motherboard/BIOS).
Keep HT link frequency at around 2ghz for now (16bit link width), and try to keep memory frequency around stock for now to eliminate the possibility for any instability that is not related to the core speed- or whatever your testing. It is for this reason I tend to think it's better to use just the multipliers for now which I recently posted about in this thread.
Why I say that adjusting the multipliers is better than HTT for overclocking is because with the multipliers you have may more control. With the HTT it comes stock at 200mhz, now for arguments sake let's say we up that to 230mhz. So now we have:
230 x 16 = 3680mhz Core Speed
230 x 10 = 2.3GHZ NB speed
230 x 10 = 2.3ghz HT frequency
2 (230 x 2) = 920mhz Memory frequency with the stock 1:2 divider.
That's 4 settings that have all been increased with the HTT. Now if something goes wrong, and we get instability- it could be any one of those settings that is the problem but we wouldn't know which one unless we changed the multipliers on each one and test individually which can take ages and even then, your results are not really indicative as a multiplier will reduce said frequency by 230mhz, which may be more than is required. So you are losing potential performance if you only need to drop down in reality by 10mhz for stability. Instead I propose adjusting each multiplier individually so what you'd end up with is something like this at stock and a little bump on the core speed only:
200 x 18 = 3600mhz Core speed
200 x 10 = 2ghz NB
200 x 10 = 2GHZ HT
2 (200x2) = 800mhz memory @ 1:2 divider.
So if anything is unstable you know for sure instantly that it is the Core that is unstable at that speed so you need only adjust that or apply a little more Vcore. So you can do this for CPU, NB, Memory and HT individually which will give you better results and the facts quicker than if you were to do it by HTT. Once you have the facts, you can tweak it later with perhaps a few mhz on the HTT.
On the X3, NB VID comes stock @ 1.2v and most people get around 2400mhz stable out of that, 2600 mhz requires anything from 1.25-1.4v generally.
