P965 chipset and overclock "straps"

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keldegar

Limp Gawd
Joined
Dec 11, 2006
Messages
339
I was wondering if someone knew what the different "straps" are on the Asus P5B (P965). Someone has some data on it:

chipset%20clock%20speed%20Vs%20CPU%20fsb_a.jpg


and link: http://www.bleedinedgesupport.com/ocz/forum/showthread.php?t=23803

I was wondering if anyone else has done some testing, it appears that the Asus p5b goes into the 1333 strap at 401fsb, because memory bandwith continues to rise from 266fsb up till 400fsb.. but then drops down to 333fsb levels at 401fsb..

i am trying to decide whether it is worth it to attempt going higher than 3.2ghz.. i think my proc can do 3.6ghz considering my temps and voltage @ 3.2ghz (35-46C idle 1.303V, 47-58C load 1.248V) (yeah ambient temp changes in my room alot, its hot here.. and i don't always have AC on).

I most likely will have to change my RAM to cas5, currently 4-4-4-12, which is another factor...
 
You'll never notice a speed difference between the different RAM speeds at those straps...

Unless you run SISOFT Sandra for a fun night out on Fridays.
 
did a few tries..

425fsb (3.4ghz), set voltage to 1.4V in BIOS
ram set to 850mhz 5-5-5-15

windows booted
pass super pi 1m

tried 450fsb (3.6ghz), set voltage to 1.450V in BIOS
ram set to 900mhz 5-5-5-15

windows booted
blue screen

tried 450fsb, voltage to 1.475V in BIOS

windows booted
orthos fails in <10sec
orthos blue screen

I didn't wanna pump that much voltage into it... i guess I am stuck at 3.2ghz because I am chicken.. even @ 3.2ghz my windows was suddenly unstable (explorer crashed on startup, probably from the bluescreens before) so I had to system restore (love system restore). Everything is fine now tho :D

I could probably squeeze 3.4ghz out of it but thats nearing the limits I think... probably stressing it out too much. computer feels a lot more comfortable at 3.2ghz..
 
Arcygenical said:
I can't believe you'd be unstable at 3.4ghz...
What's your RAM voltage?
Click to expand...

what settings should I try for 3.4ghz?

btw I have corsair XMS2 pc5400... that might also be a factor. Also my mobo only goes up to 2.1V VDIMM (which is what its set at)
 
Ahh, I missed that... Sorry :)

Since your Dram frequency is 1:1 (533 divider under Dram Frequency right?) your RAM probably wont post much over 400 FSB...
 
yep.

I figured, but I am happy with 3.2ghz! I was shooting for that, which is why I went with the cheaper RAM to save about $60.
 
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