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955 Max safe CPU-NB voltage? - Page 3

post #21 of 33
Thread Starter 
Hmm, well even with 1.55v on the CPU NB, I can't get it stable at 2900MHz
 
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post #22 of 33
2800 is plenty fast for your ram speed, try to stabilize at that.

I'm guessing you are overclocking with fsb, what is your reference clock at?
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post #23 of 33
You will be fine at 2.67GHz NB. You need NB frquency over 2660 your ram at 1776.
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post #24 of 33
Thread Starter 
Quote:
Originally Posted by stonedzen View Post
2800 is plenty fast for your ram speed, try to stabilize at that.

I'm guessing you are overclocking with fsb, what is your reference clock at?
Yeah, it's 223. So it's either 2676 or 2899 NB.
 
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post #25 of 33
Thread Starter 
Quote:
Originally Posted by dixson01974 View Post
You will be fine at 2.67GHz NB. You need NB frquency over 2660 your ram at 1776.
Is there a ratio that you have to have? How do you know?
 
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post #26 of 33
You take your dram frquency and times it by 3 and that is the min NB frquency you need.
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post #27 of 33
Thread Starter 
Ok thanks
 
Gateway LT2207h
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Gateway LT2207h
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post #28 of 33
I think your RAM timings might be suspicious. Its hard to get stable past ddr3 1600 with anything smaller then 7-7-7. Im at 1600 even at 8-8-8-24-1t, BUT, Im also using all 4 dimm slots, 4x2GB, and thats hard on AMD CPU IMCs, but I'm perfectly stable. 4ghz, ddr3 1600, 2800nb. 1.525vcore, 1.3 cpu-nb, 1.28vcore NB, and 1.74vRAM.
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This rig is awesome :) 
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post #29 of 33
Quote:
Originally Posted by dixson01974 View Post
AMD says 1.55v on air.
yup
Quote:
Originally Posted by SwishaMane View Post
CPU-NB Voltage?
yup
Quote:
Originally Posted by MetalBeerSolid View Post
No, that's the CPU voltage. I'm talking about the IMC (CPU-NB)
they're both 1.55
Quote:
Originally Posted by dixson01974 View Post
NO!!! AMD says CPU/NB voltage is 1.55v Max. AMD says CPU voltage for a 955 is 1.425v max. OCER says CPU voltage is 1.55v on air. I know my stuff.
yup (1.55 for CPU on air, but apparently 1.6 is k if your temps are great)
Quote:
Originally Posted by youra6 View Post
Yes.... You can have the CPU-NB as high as the Vcore. But generally speaking the CPU-NB voltage should be lower. I would say 1.45V would be a good stopping point.
debatable but yes, i would agree around 1.475 is enough, you won't get any more clock out of it unless you had the CPU below 0
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post #30 of 33
1.4v for 2.8ghz CPU/NB
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